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|
||||
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
|
||||
@@ -1 +1 @@
|
||||
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
|
||||
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
|
||||
File diff suppressed because one or more lines are too long
@@ -258,3 +258,4 @@ RUN set -ex && \
|
||||
RUN PIP_CONFIG_FILE=/pipconfig.txt PYTHONDONTWRITEBYTECODE=1 pip install --no-cache-dir -c /api/constraints.txt -e /deps/*
|
||||
|
||||
ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_graphs/src/agent.py:graph", "storm": "/deps/__outer_graphs/src/storm.py:graph"}'
|
||||
```
|
||||
@@ -0,0 +1,132 @@
|
||||
# Breakpoints
|
||||
|
||||
Breakpoints pause graph execution at specific points and enable stepping through execution step by step. Breakpoints are powered by LangGraph's [**persistence layer**](./persistence.md), which saves the state after each graph step. Breakpoints can also be used to enable [**human-in-the-loop**](./human_in_the_loop.md) workflows, though we recommend using the [`interrupt` function](./human_in_the_loop.md#interrupt) for this purpose.
|
||||
|
||||
## Requirements
|
||||
|
||||
To use breakpoints, you will need to:
|
||||
|
||||
1. [**Specify a checkpointer**](persistence.md#checkpoints) to save the graph state after each step.
|
||||
2. [**Set breakpoints**](#setting-breakpoints) to specify where execution should pause.
|
||||
3. **Run the graph** with a [**thread ID**](./persistence.md#threads) to pause execution at the breakpoint.
|
||||
4. **Resume execution** using `invoke`/`ainvoke`/`stream`/`astream` (see [**The `Command` primitive**](./human_in_the_loop.md#the-command-primitive)).
|
||||
|
||||
## Setting breakpoints
|
||||
|
||||
There are two places where you can set breakpoints:
|
||||
|
||||
1. **Before** or **after** a node executes by setting breakpoints at **compile time** or **run time**. We call these [**static breakpoints**](#static-breakpoints).
|
||||
2. **Inside** a node using the [`NodeInterrupt` exception](#nodeinterrupt-exception).
|
||||
|
||||
### Static breakpoints
|
||||
|
||||
Static breakpoints are triggered either **before** or **after** a node executes. You can set static breakpoints by specifying `interrupt_before` and `interrupt_after` at **"compile" time** or **run time**.
|
||||
|
||||
=== "Compile time"
|
||||
|
||||
```python
|
||||
graph = graph_builder.compile(
|
||||
interrupt_before=["node_a"],
|
||||
interrupt_after=["node_b", "node_c"],
|
||||
checkpointer=..., # Specify a checkpointer
|
||||
)
|
||||
|
||||
thread_config = {
|
||||
"configurable": {
|
||||
"thread_id": "some_thread"
|
||||
}
|
||||
}
|
||||
|
||||
# Run the graph until the breakpoint
|
||||
graph.invoke(inputs, config=thread_config)
|
||||
|
||||
# Optionally update the graph state based on user input
|
||||
graph.update_state(update, config=thread_config)
|
||||
|
||||
# Resume the graph
|
||||
graph.invoke(None, config=thread_config)
|
||||
```
|
||||
|
||||
=== "Run time"
|
||||
|
||||
```python
|
||||
graph.invoke(
|
||||
inputs,
|
||||
config={"configurable": {"thread_id": "some_thread"}},
|
||||
interrupt_before=["node_a"],
|
||||
interrupt_after=["node_b", "node_c"]
|
||||
)
|
||||
|
||||
thread_config = {
|
||||
"configurable": {
|
||||
"thread_id": "some_thread"
|
||||
}
|
||||
}
|
||||
|
||||
# Run the graph until the breakpoint
|
||||
graph.invoke(inputs, config=thread_config)
|
||||
|
||||
# Optionally update the graph state based on user input
|
||||
graph.update_state(update, config=thread_config)
|
||||
|
||||
# Resume the graph
|
||||
graph.invoke(None, config=thread_config)
|
||||
```
|
||||
|
||||
!!! note
|
||||
|
||||
You cannot set static breakpoints at runtime for **sub-graphs**.
|
||||
If you have a sub-graph, you must set the breakpoints at compilation time.
|
||||
|
||||
Static breakpoints can be especially useful for debugging if you want to step through the graph execution one
|
||||
node at a time or if you want to pause the graph execution at specific nodes.
|
||||
|
||||
### `NodeInterrupt` exception
|
||||
|
||||
We recommend that you [**use the `interrupt` function instead**](#the-interrupt-function) of the `NodeInterrupt` exception if you're trying to implement
|
||||
[human-in-the-loop](./human_in_the_loop.md) workflows. The `interrupt` function is easier to use and more flexible.
|
||||
|
||||
??? node "`NodeInterrupt` exception"
|
||||
|
||||
The developer can define some *condition* that must be met for a breakpoint to be triggered. This concept of [dynamic breakpoints](./low_level.md#dynamic-breakpoints) is useful when the developer wants to halt the graph under *a particular condition*. This uses a `NodeInterrupt`, which is a special type of exception that can be raised from within a node based upon some condition. As an example, we can define a dynamic breakpoint that triggers when the `input` is longer than 5 characters.
|
||||
|
||||
```python
|
||||
def my_node(state: State) -> State:
|
||||
if len(state['input']) > 5:
|
||||
raise NodeInterrupt(f"Received input that is longer than 5 characters: {state['input']}")
|
||||
|
||||
return state
|
||||
```
|
||||
|
||||
|
||||
Let's assume we run the graph with an input that triggers the dynamic breakpoint and then attempt to resume the graph execution simply by passing in `None` for the input.
|
||||
|
||||
```python
|
||||
# Attempt to continue the graph execution with no change to state after we hit the dynamic breakpoint
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
The graph will *interrupt* again because this node will be *re-run* with the same graph state. We need to change the graph state such that the condition that triggers the dynamic breakpoint is no longer met. So, we can simply edit the graph state to an input that meets the condition of our dynamic breakpoint (< 5 characters) and re-run the node.
|
||||
|
||||
```python
|
||||
# Update the state to pass the dynamic breakpoint
|
||||
graph.update_state(config=thread_config, values={"input": "foo"})
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
Alternatively, what if we want to keep our current input and skip the node (`my_node`) that performs the check? To do this, we can simply perform the graph update with `as_node="my_node"` and pass in `None` for the values. This will make no update the graph state, but run the update as `my_node`, effectively skipping the node and bypassing the dynamic breakpoint.
|
||||
|
||||
```python
|
||||
# This update will skip the node `my_node` altogether
|
||||
graph.update_state(config=thread_config, values=None, as_node="my_node")
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
## Additional Resources 📚
|
||||
|
||||
- [**Conceptual Guide: Persistence**](persistence.md): Read the persistence guide for more context about persistence.
|
||||
- [**Conceptual Guide: Human-in-the-loop**](human_in_the_loop.md): Read the human-in-the-loop guide for more context on integrating human feedback into LangGraph applications using breakpoints.
|
||||
- [**How to View and Update Past Graph State**](../how-tos/human_in_the_loop/time-travel.ipynb): Step-by-step instructions for working with graph state that demonstrate the **replay** and **fork** actions.
|
||||
@@ -1,322 +1,741 @@
|
||||
# Human-in-the-loop
|
||||
|
||||
Human-in-the-loop (or "on-the-loop") enhances agent capabilities through several common user interaction patterns.
|
||||
!!! tip "This guide uses the new `interrupt` function."
|
||||
|
||||
Common interaction patterns include:
|
||||
As of LangGraph 0.2.57, the recommended way to set breakpoints is using the [`interrupt` function][langgraph.types.interrupt] as it simplifies **human-in-the-loop** patterns.
|
||||
|
||||
(1) `Approval` - We can interrupt our agent, surface the current state to a user, and allow the user to accept an action.
|
||||
If you're looking for the previous version of this conceptual guide, which relied on static breakpoints and `NodeInterrupt` exception, it is available [here](v0-human-in-the-loop.md).
|
||||
|
||||
(2) `Editing` - We can interrupt our agent, surface the current state to a user, and allow the user to edit the agent state.
|
||||
A **human-in-the-loop** (or "on-the-loop") workflow integrates human input into automated processes, allowing for decisions, validation, or corrections at key stages. This is especially useful in **LLM-based applications**, where the underlying model may generate occasional inaccuracies. In low-error-tolerance scenarios like compliance, decision-making, or content generation, human involvement ensures reliability by enabling review, correction, or override of model outputs.
|
||||
|
||||
(3) `Input` - We can explicitly create a graph node to collect human input and pass that input directly to the agent state.
|
||||
|
||||
Use-cases for these interaction patterns include:
|
||||
## Use cases
|
||||
|
||||
(1) `Reviewing tool calls` - We can interrupt an agent to review and edit the results of tool calls.
|
||||
Key use cases for **human-in-the-loop** workflows in LLM-based applications include:
|
||||
|
||||
(2) `Time Travel` - We can manually re-play and / or fork past actions of an agent.
|
||||
1. [**🛠️ Reviewing tool calls**](#review-tool-calls): Humans can review, edit, or approve tool calls requested by the LLM before tool execution.
|
||||
2. **✅ Validating LLM outputs**: Humans can review, edit, or approve content generated by the LLM.
|
||||
3. **💡 Providing context**: Enable the LLM to explicitly request human input for clarification or additional details or to support multi-turn conversations.
|
||||
|
||||
## Persistence
|
||||
## `interrupt`
|
||||
|
||||
All of these interaction patterns are enabled by LangGraph's built-in [persistence](./persistence.md) layer, which will write a checkpoint of the graph state at each step. Persistence allows the graph to stop so that a human can review and / or edit the current state of the graph and then resume with the human's input.
|
||||
|
||||
### Breakpoints
|
||||
|
||||
Adding a [breakpoint](./low_level.md#breakpoints) a specific location in the graph flow is one way to enable human-in-the-loop. In this case, the developer knows *where* in the workflow human input is needed and simply places a breakpoint prior to or following that particular graph node.
|
||||
|
||||
Here, we compile our graph with a checkpointer and a breakpoint at the node we want to interrupt before, `step_for_human_in_the_loop`. We then perform one of the above interaction patterns, which will create a new checkpoint if a human edits the graph state. The new checkpoint is saved to the `thread` and we can resume the graph execution from there by passing in `None` as the input.
|
||||
The [`interrupt` function][langgraph.types.interrupt] in LangGraph enables human-in-the-loop workflows by pausing the graph at a specific node, presenting information to a human, and resuming the graph with their input. This function is useful for tasks like approvals, edits, or collecting additional input. The [`interrupt` function][langgraph.types.interrupt] is used in conjunction with the [`Command`](../reference/types.md#langgraph.types.Command) object to resume the graph with a value provided by the human.
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before "step_for_human_in_the_loop"
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["step_for_human_in_the_loop"])
|
||||
from langgraph.types import interrupt
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
thread_config = {"configurable": {"thread_id": "1"}}
|
||||
for event in graph.stream(inputs, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
def human_node(state: State):
|
||||
value = interrupt(
|
||||
# Any JSON serializable value to surface to the human.
|
||||
# For example, a question or a piece of text or a set of keys in the state
|
||||
{
|
||||
"text_to_revise": state["some_text"]
|
||||
}
|
||||
)
|
||||
# Update the state with the human's input or route the graph based on the input.
|
||||
return {
|
||||
"some_text": value
|
||||
}
|
||||
|
||||
graph = graph_builder.compile(
|
||||
checkpointer=checkpointer # Required for `interrupt` to work
|
||||
)
|
||||
|
||||
# Run the graph until the interrupt
|
||||
thread_config = {"configurable": {"thread_id": "some_id"}}
|
||||
graph.invoke(some_input, config=thread_config)
|
||||
|
||||
# Perform some action that requires human in the loop
|
||||
|
||||
# Continue the graph execution from the current checkpoint
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
# Resume the graph with the human's input
|
||||
graph.invoke(Command(resume=value_from_human), config=thread_config)
|
||||
```
|
||||
|
||||
### Dynamic Breakpoints
|
||||
```pycon
|
||||
{'some_text': 'Edited text'}
|
||||
```
|
||||
|
||||
Alternatively, the developer can define some *condition* that must be met for a breakpoint to be triggered. This concept of [dynamic breakpoints](./low_level.md#dynamic-breakpoints) is useful when the developer wants to halt the graph under *a particular condition*. This uses a `NodeInterrupt`, which is a special type of exception that can be raised from within a node based upon some condition. As an example, we can define a dynamic breakpoint that triggers when the `input` is longer than 5 characters.
|
||||
!!! warning
|
||||
Interrupts are both powerful and ergonomic. However, while they may resemble Python's input() function in terms of developer experience, it's important to note that they do not automatically resume execution from the interruption point. Instead, they rerun the entire node where the interrupt was used.
|
||||
For this reason, interrupts are typically best placed at the start of a node or in a dedicated node. Please read the [resuming from an interrupt](#how-does-resuming-from-an-interrupt-work) section for more details.
|
||||
|
||||
??? "Full Code"
|
||||
|
||||
Here's a full example of how to use `interrupt` in a graph, if you'd like
|
||||
to see the code in action.
|
||||
|
||||
```python
|
||||
from typing import TypedDict
|
||||
|
||||
from langgraph.checkpoint.memory import MemorySaver
|
||||
from langgraph.constants import START
|
||||
from langgraph.graph import StateGraph
|
||||
from langgraph.types import interrupt, Command
|
||||
|
||||
class State(TypedDict):
|
||||
"""The graph state."""
|
||||
some_text: str
|
||||
|
||||
def human_node(state: State):
|
||||
value = interrupt(
|
||||
# Any JSON serializable value to surface to the human.
|
||||
# For example, a question or a piece of text or a set of keys in the state
|
||||
{
|
||||
"text_to_revise": state["some_text"]
|
||||
}
|
||||
)
|
||||
return {
|
||||
# Update the state with the human's input
|
||||
"some_text": value
|
||||
}
|
||||
|
||||
|
||||
# Build the graph
|
||||
graph_builder = StateGraph(State)
|
||||
# Add the human-node to the graph
|
||||
graph_builder.add_node("human_node", human_node)
|
||||
graph_builder.add_edge(START, "human_node")
|
||||
|
||||
# A checkpointer is required for `interrupt` to work.
|
||||
checkpointer = MemorySaver()
|
||||
graph = graph_builder.compile(
|
||||
checkpointer=checkpointer
|
||||
)
|
||||
|
||||
|
||||
# Using stream() to directly surface the `__interrupt__` information.
|
||||
for chunk in graph.stream({"some_text": "Original text"}, config=thread_config):
|
||||
print(chunk)
|
||||
|
||||
# Resume using Command
|
||||
for chunk in graph.stream(Command(resume="Edited text"), config=thread_config):
|
||||
print(chunk)
|
||||
```
|
||||
|
||||
```pycon
|
||||
{'__interrupt__': (
|
||||
Interrupt(
|
||||
value={'question': 'Please revise the text', 'some_text': 'Original text'},
|
||||
resumable=True,
|
||||
ns=['human_node:10fe492f-3688-c8c6-0d0a-ec61a43fecd6'],
|
||||
when='during'
|
||||
),
|
||||
)
|
||||
}
|
||||
{'human_node': {'some_text': 'Edited text'}}
|
||||
```
|
||||
|
||||
## Requirements
|
||||
|
||||
To use `interrupt` in your graph, you need to:
|
||||
|
||||
1. [**Specify a checkpointer**](persistence.md#checkpoints) to save the graph state after each step.
|
||||
2. **Call `interrupt()`** in the appropriate place. See the [Design Patterns](#design-patterns) section for examples.
|
||||
3. **Run the graph** with a [**thread ID**](./persistence.md#threads) until the `interrupt` is hit.
|
||||
4. **Resume execution** using `invoke`/`ainvoke`/`stream`/`astream` (see [**The `Command` primitive**](#the-command-primitive)).
|
||||
|
||||
## Design Patterns
|
||||
|
||||
There are typically three different **actions** that you can do with a human-in-the-loop workflow:
|
||||
|
||||
1. **Approve or Reject**: Pause the graph before a critical step, such as an API call, to review and approve the action. If the action is rejected, you can prevent the graph from executing the step, and potentially take an alternative action. This pattern often involve **routing** the graph based on the human's input.
|
||||
2. **Edit Graph State**: Pause the graph to review and edit the graph state. This is useful for correcting mistakes or updating the state with additional information. This pattern often involves **updating** the state with the human's input.
|
||||
3. **Get Input**: Explicitly request human input at a particular step in the graph. This is useful for collecting additional information or context to inform the agent's decision-making process or for supporting **multi-turn conversations**.
|
||||
|
||||
Below we show different design patterns that can be implemented using these **actions**.
|
||||
|
||||
### Approve or Reject
|
||||
|
||||
<figure markdown="1">
|
||||
{: style="max-height:400px"}
|
||||
<figcaption>Depending on the human's approval or rejection, the graph can proceed with the action or take an alternative path.</figcaption>
|
||||
</figure>
|
||||
|
||||
Pause the graph before a critical step, such as an API call, to review and approve the action. If the action is rejected, you can prevent the graph from executing the step, and potentially take an alternative action.
|
||||
|
||||
```python
|
||||
def my_node(state: State) -> State:
|
||||
if len(state['input']) > 5:
|
||||
raise NodeInterrupt(f"Received input that is longer than 5 characters: {state['input']}")
|
||||
return state
|
||||
|
||||
from typing import Literal
|
||||
from langgraph.types import interrupt, Command
|
||||
|
||||
def human_approval(state: State) -> Command[Literal["some_node", "another_node"]]:
|
||||
is_approved = interrupt(
|
||||
{
|
||||
"question": "Is this correct?",
|
||||
# Surface the output that should be
|
||||
# reviewed and approved by the human.
|
||||
"llm_output": state["llm_output"]
|
||||
}
|
||||
)
|
||||
|
||||
if is_approved:
|
||||
return Command(goto="some_node")
|
||||
else:
|
||||
return Command(goto="another_node")
|
||||
|
||||
# Add the node to the graph in an appropriate location
|
||||
# and connect it to the relevant nodes.
|
||||
graph_builder.add_node("human_approval", human_approval)
|
||||
graph = graph_builder.compile(checkpointer=checkpointer)
|
||||
|
||||
# After running the graph and hitting the interrupt, the graph will pause.
|
||||
# Resume it with either an approval or rejection.
|
||||
thread_config = {"configurable": {"thread_id": "some_id"}}
|
||||
graph.invoke(Command(resume=True), config=thread_config)
|
||||
```
|
||||
|
||||
Let's assume we run the graph with an input that triggers the dynamic breakpoint and then attempt to resume the graph execution simply by passing in `None` for the input.
|
||||
See [how to review tool calls](../how-tos/human_in_the_loop/review-tool-calls.ipynb) for a more detailed example.
|
||||
|
||||
### Review & Edit State
|
||||
|
||||
<figure markdown="1">
|
||||
{: style="max-height:400px"}
|
||||
<figcaption>A human can review and edit the state of the graph. This is useful for correcting mistakes or updating the state with additional information.
|
||||
</figcaption>
|
||||
</figure>
|
||||
|
||||
```python
|
||||
# Attempt to continue the graph execution with no change to state after we hit the dynamic breakpoint
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
from langgraph.types import interrupt
|
||||
|
||||
def human_editing(state: State):
|
||||
...
|
||||
result = interrupt(
|
||||
# Interrupt information to surface to the client.
|
||||
# Can be any JSON serializable value.
|
||||
{
|
||||
"task": "Review the output from the LLM and make any necessary edits.",
|
||||
"llm_generated_summary": state["llm_generated_summary"]
|
||||
}
|
||||
)
|
||||
|
||||
# Update the state with the edited text
|
||||
return {
|
||||
"llm_generated_summary": result["edited_text"]
|
||||
}
|
||||
|
||||
# Add the node to the graph in an appropriate location
|
||||
# and connect it to the relevant nodes.
|
||||
graph_builder.add_node("human_editing", human_editing)
|
||||
graph = graph_builder.compile(checkpointer=checkpointer)
|
||||
|
||||
...
|
||||
|
||||
# After running the graph and hitting the interrupt, the graph will pause.
|
||||
# Resume it with the edited text.
|
||||
thread_config = {"configurable": {"thread_id": "some_id"}}
|
||||
graph.invoke(
|
||||
Command(resume={"edited_text": "The edited text"}),
|
||||
config=thread_config
|
||||
)
|
||||
```
|
||||
|
||||
The graph will *interrupt* again because this node will be *re-run* with the same graph state. We need to change the graph state such that the condition that triggers the dynamic breakpoint is no longer met. So, we can simply edit the graph state to an input that meets the condition of our dynamic breakpoint (< 5 characters) and re-run the node.
|
||||
See [How to wait for user input using interrupt](../how-tos/human_in_the_loop/wait-user-input.ipynb) for a more detailed example.
|
||||
|
||||
```python
|
||||
# Update the state to pass the dynamic breakpoint
|
||||
graph.update_state(config=thread_config, values={"input": "foo"})
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
### Review Tool Calls
|
||||
|
||||
Alternatively, what if we want to keep our current input and skip the node (`my_node`) that performs the check? To do this, we can simply perform the graph update with `as_node="my_node"` and pass in `None` for the values. This will make no update the graph state, but run the update as `my_node`, effectively skipping the node and bypassing the dynamic breakpoint.
|
||||
<figure markdown="1">
|
||||
{: style="max-height:400px"}
|
||||
<figcaption>A human can review and edit the output from the LLM before proceeding. This is particularly
|
||||
critical in applications where the tool calls requested by the LLM may be sensitive or require human oversight.
|
||||
</figcaption>
|
||||
</figure>
|
||||
|
||||
```python
|
||||
# This update will skip the node `my_node` altogether
|
||||
graph.update_state(config=thread_config, values=None, as_node="my_node")
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
def human_review_node(state) -> Command[Literal["call_llm", "run_tool"]]:
|
||||
# This is the value we'll be providing via Command(resume=<human_review>)
|
||||
human_review = interrupt(
|
||||
{
|
||||
"question": "Is this correct?",
|
||||
# Surface tool calls for review
|
||||
"tool_call": tool_call
|
||||
}
|
||||
)
|
||||
|
||||
review_action, review_data = human_review
|
||||
|
||||
# Approve the tool call and continue
|
||||
if review_action == "continue":
|
||||
return Command(goto="run_tool")
|
||||
|
||||
# Modify the tool call manually and then continue
|
||||
elif review_action == "update":
|
||||
...
|
||||
updated_msg = get_updated_msg(review_data)
|
||||
# Remember that to modify an existing message you will need
|
||||
# to pass the message with a matching ID.
|
||||
return Command(goto="run_tool", update={"messages": [updated_message]})
|
||||
|
||||
# Give natural language feedback, and then pass that back to the agent
|
||||
elif review_action == "feedback":
|
||||
...
|
||||
feedback_msg = get_feedback_msg(review_data)
|
||||
return Command(goto="call_llm", update={"messages": [feedback_msg]})
|
||||
```
|
||||
|
||||
See [our guide](../how-tos/human_in_the_loop/dynamic_breakpoints.ipynb) for a detailed how-to on doing this!
|
||||
See [how to review tool calls](../how-tos/human_in_the_loop/review-tool-calls.ipynb) for a more detailed example.
|
||||
|
||||
## Interaction Patterns
|
||||
### Multi-turn conversation
|
||||
|
||||
### Approval
|
||||
<figure markdown="1">
|
||||
{: style="max-height:400px"}
|
||||
<figcaption>A <strong>multi-turn conversation</strong> architecture where an <strong>agent</strong> and <strong>human node</strong> cycle back and forth until the agent decides to hand off the conversation to another agent or another part of the system.
|
||||
</figcaption>
|
||||
</figure>
|
||||
|
||||

|
||||
A **multi-turn conversation** involves multiple back-and-forth interactions between an agent and a human, which can allow the agent to gather additional information from the human in a conversational manner.
|
||||
|
||||
Sometimes we want to approve certain steps in our agent's execution.
|
||||
|
||||
We can interrupt our agent at a [breakpoint](./low_level.md#breakpoints) prior to the step that we want to approve.
|
||||
This design pattern is useful in an LLM application consisting of [multiple agents](./multi_agent.md). One or more agents may need to carry out multi-turn conversations with a human, where the human provides input or feedback at different stages of the conversation. For simplicity, the agent implementation below is illustrated as a single node, but in reality
|
||||
it may be part of a larger graph consisting of multiple nodes and include a conditional edge.
|
||||
|
||||
This is generally recommend for sensitive actions (e.g., using external APIs or writing to a database).
|
||||
|
||||
With persistence, we can surface the current agent state as well as the next step to a user for review and approval.
|
||||
|
||||
If approved, the graph resumes execution from the last saved checkpoint, which is saved to the `thread`:
|
||||
=== "Using a human node per agent"
|
||||
|
||||
In this pattern, each agent has its own human node for collecting user input.
|
||||
This can be achieved by either naming the human nodes with unique names (e.g., "human for agent 1", "human for agent 2") or by
|
||||
using subgraphs where a subgraph contains a human node and an agent node.
|
||||
|
||||
```python
|
||||
from langgraph.types import interrupt
|
||||
|
||||
def human_input(state: State):
|
||||
human_message = interrupt("human_input")
|
||||
return {
|
||||
"messages": [
|
||||
{
|
||||
"role": "human",
|
||||
"content": human_message
|
||||
}
|
||||
]
|
||||
}
|
||||
|
||||
def agent(state: State):
|
||||
# Agent logic
|
||||
...
|
||||
|
||||
graph_builder.add_node("human_input", human_input)
|
||||
graph_builder.add_edge("human_input", "agent")
|
||||
graph = graph_builder.compile(checkpointer=checkpointer)
|
||||
|
||||
# After running the graph and hitting the interrupt, the graph will pause.
|
||||
# Resume it with the human's input.
|
||||
graph.invoke(
|
||||
Command(resume="hello!"),
|
||||
config=thread_config
|
||||
)
|
||||
```
|
||||
|
||||
|
||||
=== "Sharing human node across multiple agents"
|
||||
|
||||
In this pattern, a single human node is used to collect user input for multiple agents. The active agent is determined from the state, so after human input is collected, the graph can route to the correct agent.
|
||||
|
||||
```python
|
||||
from langgraph.types import interrupt
|
||||
|
||||
def human_node(state: MessagesState) -> Command[Literal["agent_1", "agent_2", ...]]:
|
||||
"""A node for collecting user input."""
|
||||
user_input = interrupt(value="Ready for user input.")
|
||||
|
||||
# Determine the **active agent** from the state, so
|
||||
# we can route to the correct agent after collecting input.
|
||||
# For example, add a field to the state or use the last active agent.
|
||||
# or fill in `name` attribute of AI messages generated by the agents.
|
||||
active_agent = ...
|
||||
|
||||
return Command(
|
||||
update={
|
||||
"messages": [{
|
||||
"role": "human",
|
||||
"content": user_input,
|
||||
}]
|
||||
},
|
||||
goto=active_agent,
|
||||
)
|
||||
```
|
||||
|
||||
See [how to implement multi-turn conversations](../how-tos/multi-agent-multi-turn-convo.ipynb) for a more detailed example.
|
||||
|
||||
### Validating human input
|
||||
|
||||
If you need to validate the input provided by the human within the graph itself (rather than on the client side), you can achieve this by using multiple interrupt calls within a single node.
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before the step to approve
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["node_2"])
|
||||
from langgraph.types import interrupt
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
for event in graph.stream(inputs, thread, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# ... Get human approval ...
|
||||
def human_node(state: State):
|
||||
"""Human node with validation."""
|
||||
question = "What is your age?"
|
||||
|
||||
# If approved, continue the graph execution from the last saved checkpoint
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
while True:
|
||||
answer = interrupt(question)
|
||||
|
||||
# Validate answer, if the answer isn't valid ask for input again.
|
||||
if not isinstance(answer, int) or answer < 0:
|
||||
question = f"'{answer} is not a valid age. What is your age?"
|
||||
answer = None
|
||||
continue
|
||||
else:
|
||||
# If the answer is valid, we can proceed.
|
||||
break
|
||||
|
||||
print(f"The human in the loop is {answer} years old.")
|
||||
return {
|
||||
"age": answer
|
||||
}
|
||||
```
|
||||
|
||||
See [our guide](../how-tos/human_in_the_loop/breakpoints.ipynb) for a detailed how-to on doing this!
|
||||
## The `Command` primitive
|
||||
|
||||
### Editing
|
||||
When using the `interrupt` function, the graph will pause at the interrupt and wait for user input.
|
||||
|
||||

|
||||
Graph execution can be resumed using the [Command](../reference/types.md#langgraph.types.Command) primitive which can be passed through the `invoke`, `ainvoke`, `stream` or `astream` methods.
|
||||
|
||||
Sometimes we want to review and edit the agent's state.
|
||||
|
||||
As with approval, we can interrupt our agent at a [breakpoint](./low_level.md#breakpoints) prior to the step we want to check.
|
||||
|
||||
We can surface the current state to a user and allow the user to edit the agent state.
|
||||
|
||||
This can, for example, be used to correct the agent if it made a mistake (e.g., see the section on tool calling below).
|
||||
The `Command` primitive provides several options to control and modify the graph's state during resumption:
|
||||
|
||||
We can edit the graph state by forking the current checkpoint, which is saved to the `thread`.
|
||||
1. **Pass a value to the `interrupt`**: Provide data, such as a user's response, to the graph using `Command(resume=value)`. Execution resumes from the beginning of the node where the `interrupt` was used, however, this time the `interrupt(...)` call will return the value passed in the `Command(resume=value)` instead of pausing the graph.
|
||||
|
||||
We can then proceed with the graph from our forked checkpoint as done before.
|
||||
```python
|
||||
# Resume graph execution with the user's input.
|
||||
graph.invoke(Command(resume={"age": "25"}), thread_config)
|
||||
```
|
||||
|
||||
2. **Update the graph state**: Modify the graph state using `Command(update=update)`. Note that resumption starts from the beginning of the node where the `interrupt` was used. Execution resumes from the beginning of the node where the `interrupt` was used, but with the updated state.
|
||||
|
||||
```python
|
||||
# Update the graph state and resume.
|
||||
# You must provide a `resume` value if using an `interrupt`.
|
||||
graph.invoke(Command(update={"foo": "bar"}, resume="Let's go!!!"), thread_config)
|
||||
```
|
||||
|
||||
By leveraging `Command`, you can resume graph execution, handle user inputs, and dynamically adjust the graph's state.
|
||||
|
||||
## Using with `invoke` and `ainvoke`
|
||||
|
||||
When you use `stream` or `astream` to run the graph, you will receive an `Interrupt` event that let you know the `interrupt` was triggered.
|
||||
|
||||
`invoke` and `ainvoke` do not return the interrupt information. To access this information, you must use the [get_state](../reference/graphs.md#langgraph.graph.graph.CompiledGraph.get_state) method to retrieve the graph state after calling `invoke` or `ainvoke`.
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before the step to review
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["node_2"])
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
for event in graph.stream(inputs, thread, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# Review the state, decide to edit it, and create a forked checkpoint with the new state
|
||||
graph.update_state(thread, {"state": "new state"})
|
||||
|
||||
# Continue the graph execution from the forked checkpoint
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
# Run the graph up to the interrupt
|
||||
result = graph.invoke(inputs, thread_config)
|
||||
# Get the graph state to get interrupt information.
|
||||
state = graph.get_state(thread_config)
|
||||
# Print the state values
|
||||
print(state.values)
|
||||
# Print the pending tasks
|
||||
print(state.tasks)
|
||||
# Resume the graph with the user's input.
|
||||
graph.invoke(Command(resume={"age": "25"}), thread_config)
|
||||
```
|
||||
|
||||
See [this guide](../how-tos/human_in_the_loop/edit-graph-state.ipynb) for a detailed how-to on doing this!
|
||||
```pycon
|
||||
{'foo': 'bar'} # State values
|
||||
(
|
||||
PregelTask(
|
||||
id='5d8ffc92-8011-0c9b-8b59-9d3545b7e553',
|
||||
name='node_foo',
|
||||
path=('__pregel_pull', 'node_foo'),
|
||||
error=None,
|
||||
interrupts=(Interrupt(value='value_in_interrupt', resumable=True, ns=['node_foo:5d8ffc92-8011-0c9b-8b59-9d3545b7e553'], when='during'),), state=None,
|
||||
result=None
|
||||
),
|
||||
) # Pending tasks. interrupts
|
||||
```
|
||||
|
||||
### Input
|
||||
## How does resuming from an interrupt work?
|
||||
|
||||

|
||||
!!! warning
|
||||
|
||||
Sometimes we want to explicitly get human input at a particular step in the graph.
|
||||
|
||||
We can create a graph node designated for this (e.g., `human_input` in our example diagram).
|
||||
|
||||
As with approval and editing, we can interrupt our agent at a [breakpoint](./low_level.md#breakpoints) prior to this node.
|
||||
|
||||
We can then perform a state update that includes the human input, just as we did with editing state.
|
||||
Resuming from an `interrupt` is **different** from Python's `input()` function, where execution resumes from the exact point where the `input()` function was called.
|
||||
|
||||
But, we add one thing:
|
||||
A critical aspect of using `interrupt` is understanding how resuming works. When you resume execution after an `interrupt`, graph execution starts from the **beginning** of the **graph node** where the last `interrupt` was triggered.
|
||||
|
||||
We can use `as_node=human_input` with the state update to specify that the state update *should be treated as a node*.
|
||||
|
||||
The is subtle, but important:
|
||||
|
||||
With editing, the user makes a decision about whether or not to edit the graph state.
|
||||
|
||||
With input, we explicitly define a node in our graph for collecting human input!
|
||||
|
||||
The state update with the human input then runs *as this node*.
|
||||
**All** code from the beginning of the node to the `interrupt` will be re-executed.
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before the step to to collect human input
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["human_input"])
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
for event in graph.stream(inputs, thread, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# Update the state with the user input as if it was the human_input node
|
||||
graph.update_state(thread, {"user_input": user_input}, as_node="human_input")
|
||||
|
||||
# Continue the graph execution from the checkpoint created by the human_input node
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
counter = 0
|
||||
def node(state: State):
|
||||
# All the code from the beginning of the node to the interrupt will be re-executed
|
||||
# when the graph resumes.
|
||||
global counter
|
||||
counter += 1
|
||||
print(f"> Entered the node: {counter} # of times")
|
||||
# Pause the graph and wait for user input.
|
||||
answer = interrupt()
|
||||
print("The value of counter is:", counter)
|
||||
...
|
||||
```
|
||||
|
||||
See [this guide](../how-tos/human_in_the_loop/wait-user-input.ipynb) for a detailed how-to on doing this!
|
||||
Upon **resuming** the graph, the counter will be incremented a second time, resulting in the following output:
|
||||
|
||||
## Use-cases
|
||||
```pycon
|
||||
> Entered the node: 2 # of times
|
||||
The value of counter is: 2
|
||||
```
|
||||
|
||||
### Reviewing Tool Calls
|
||||
## Common Pitfalls
|
||||
|
||||
Some user interaction patterns combine the above ideas.
|
||||
### Side-effects
|
||||
|
||||
For example, many agents use [tool calling](https://python.langchain.com/docs/how_to/tool_calling/) to make decisions.
|
||||
Place code with side effects, such as API calls, **after** the `interrupt` to avoid duplication, as these are re-triggered every time the node is resumed.
|
||||
|
||||
Tool calling presents a challenge because the agent must get two things right:
|
||||
=== "Side effects before interrupt (BAD)"
|
||||
|
||||
(1) The name of the tool to call
|
||||
This code will re-execute the API call another time when the node is resumed from
|
||||
the `interrupt`.
|
||||
|
||||
(2) The arguments to pass to the tool
|
||||
This can be problematic if the API call is not idempotent or is just expensive.
|
||||
|
||||
Even if the tool call is correct, we may also want to apply discretion:
|
||||
```python
|
||||
from langgraph.types import interrupt
|
||||
|
||||
(3) The tool call may be a sensitive operation that we want to approve
|
||||
def human_node(state: State):
|
||||
"""Human node with validation."""
|
||||
api_call(...) # This code will be re-executed when the node is resumed.
|
||||
answer = interrupt(question)
|
||||
```
|
||||
|
||||
With these points in mind, we can combine the above ideas to create a human-in-the-loop review of a tool call.
|
||||
=== "Side effects after interrupt (OK)"
|
||||
|
||||
```python
|
||||
from langgraph.types import interrupt
|
||||
|
||||
def human_node(state: State):
|
||||
"""Human node with validation."""
|
||||
|
||||
answer = interrupt(question)
|
||||
|
||||
api_call(answer) # OK as it's after the interrupt
|
||||
```
|
||||
|
||||
=== "Side effects in a separate node (OK)"
|
||||
|
||||
```python
|
||||
from langgraph.types import interrupt
|
||||
|
||||
def human_node(state: State):
|
||||
"""Human node with validation."""
|
||||
|
||||
answer = interrupt(question)
|
||||
|
||||
return {
|
||||
"answer": answer
|
||||
}
|
||||
|
||||
def api_call_node(state: State):
|
||||
api_call(...) # OK as it's in a separate node
|
||||
```
|
||||
|
||||
### Subgraphs called as functions
|
||||
|
||||
When invoking a subgraph [as a function](low_level.md#as-a-function), the **parent graph** will resume execution from the **beginning of the node** where the subgraph was invoked (and where an `interrupt` was triggered). Similarly, the **subgraph**, will resume from the **beginning of the node** where the `interrupt()` function was called.
|
||||
|
||||
For example,
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before the step to to review the tool call from the LLM
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["human_review"])
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
for event in graph.stream(inputs, thread, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# Review the tool call and update it, if needed, as the human_review node
|
||||
graph.update_state(thread, {"tool_call": "updated tool call"}, as_node="human_review")
|
||||
|
||||
# Otherwise, approve the tool call and proceed with the graph execution with no edits
|
||||
|
||||
# Continue the graph execution from either:
|
||||
# (1) the forked checkpoint created by human_review or
|
||||
# (2) the checkpoint saved when the tool call was originally made (no edits in human_review)
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
def node_in_parent_graph(state: State):
|
||||
some_code() # <-- This will re-execute when the subgraph is resumed.
|
||||
# Invoke a subgraph as a function.
|
||||
# The subgraph contains an `interrupt` call.
|
||||
subgraph_result = subgraph.invoke(some_input)
|
||||
...
|
||||
```
|
||||
|
||||
See [this guide](../how-tos/human_in_the_loop/review-tool-calls.ipynb) for a detailed how-to on doing this!
|
||||
??? "**Example: Parent and Subgraph Execution Flow**"
|
||||
|
||||
### Time Travel
|
||||
Say we have a parent graph with 3 nodes:
|
||||
|
||||
When working with agents, we often want closely examine their decision making process:
|
||||
**Parent Graph**: `node_1` → `node_2` (subgraph call) → `node_3`
|
||||
|
||||
(1) Even when they arrive a desired final result, the reasoning that led to that result is often important to examine.
|
||||
And the subgraph has 3 nodes, where the second node contains an `interrupt`:
|
||||
|
||||
(2) When agents make mistakes, it is often valuable to understand why.
|
||||
**Subgraph**: `sub_node_1` → `sub_node_2` (`interrupt`) → `sub_node_3`
|
||||
|
||||
(3) In either of the above cases, it is useful to manually explore alternative decision making paths.
|
||||
When resuming the graph, the execution will proceed as follows:
|
||||
|
||||
Collectively, we call these debugging concepts `time-travel` and they are composed of `replaying` and `forking`.
|
||||
1. **Skip `node_1`** in the parent graph (already executed, graph state was saved in snapshot).
|
||||
2. **Re-execute `node_2`** in the parent graph from the start.
|
||||
3. **Skip `sub_node_1`** in the subgraph (already executed, graph state was saved in snapshot).
|
||||
4. **Re-execute `sub_node_2`** in the subgraph from the beginning.
|
||||
5. Continue with `sub_node_3` and subsequent nodes.
|
||||
|
||||
#### Replaying
|
||||
Here is abbreviated example code that you can use to understand how subgraphs work with interrupts.
|
||||
It counts the number of times each node is entered and prints the count.
|
||||
|
||||

|
||||
```python
|
||||
import uuid
|
||||
from typing import TypedDict
|
||||
|
||||
Sometimes we want to simply replay past actions of an agent.
|
||||
|
||||
Above, we showed the case of executing an agent from the current state (or checkpoint) of the graph.
|
||||
from langgraph.graph import StateGraph
|
||||
from langgraph.constants import START
|
||||
from langgraph.types import interrupt, Command
|
||||
from langgraph.checkpoint.memory import MemorySaver
|
||||
|
||||
We by simply passing in `None` for the input with a `thread`.
|
||||
|
||||
```
|
||||
thread = {"configurable": {"thread_id": "1"}}
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
class State(TypedDict):
|
||||
"""The graph state."""
|
||||
state_counter: int
|
||||
|
||||
Now, we can modify this to replay past actions from a *specific* checkpoint by passing in the checkpoint ID.
|
||||
|
||||
To get a specific checkpoint ID, we can easily get all of the checkpoints in the thread and filter to the one we want.
|
||||
counter_node_in_subgraph = 0
|
||||
|
||||
```python
|
||||
all_checkpoints = []
|
||||
for state in app.get_state_history(thread):
|
||||
all_checkpoints.append(state)
|
||||
```
|
||||
def node_in_subgraph(state: State):
|
||||
"""A node in the sub-graph."""
|
||||
global counter_node_in_subgraph
|
||||
counter_node_in_subgraph += 1 # This code will **NOT** run again!
|
||||
print(f"Entered `node_in_subgraph` a total of {counter_node_in_subgraph} times")
|
||||
|
||||
Each checkpoint has a unique ID, which we can use to replay from a specific checkpoint.
|
||||
counter_human_node = 0
|
||||
|
||||
Assume from reviewing the checkpoints that we want to replay from one, `xxx`.
|
||||
def human_node(state: State):
|
||||
global counter_human_node
|
||||
counter_human_node += 1 # This code will run again!
|
||||
print(f"Entered human_node in sub-graph a total of {counter_human_node} times")
|
||||
answer = interrupt("what is your name?")
|
||||
print(f"Got an answer of {answer}")
|
||||
|
||||
We just pass in the checkpoint ID when we run the graph.
|
||||
|
||||
```python
|
||||
config = {'configurable': {'thread_id': '1', 'checkpoint_id': 'xxx'}}
|
||||
for event in graph.stream(None, config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
Importantly, the graph knows which checkpoints have been previously executed.
|
||||
checkpointer = MemorySaver()
|
||||
|
||||
So, it will re-play any previously executed nodes rather than re-executing them.
|
||||
subgraph_builder = StateGraph(State)
|
||||
subgraph_builder.add_node("some_node", node_in_subgraph)
|
||||
subgraph_builder.add_node("human_node", human_node)
|
||||
subgraph_builder.add_edge(START, "some_node")
|
||||
subgraph_builder.add_edge("some_node", "human_node")
|
||||
subgraph = subgraph_builder.compile(checkpointer=checkpointer)
|
||||
|
||||
See [this additional conceptual guide](https://langchain-ai.github.io/langgraph/concepts/persistence/#replay) for related context on replaying.
|
||||
|
||||
See see [this guide](../how-tos/human_in_the_loop/time-travel.ipynb) for a detailed how-to on doing time-travel!
|
||||
counter_parent_node = 0
|
||||
|
||||
#### Forking
|
||||
def parent_node(state: State):
|
||||
"""This parent node will invoke the subgraph."""
|
||||
global counter_parent_node
|
||||
|
||||

|
||||
counter_parent_node += 1 # This code will run again on resuming!
|
||||
print(f"Entered `parent_node` a total of {counter_parent_node} times")
|
||||
|
||||
# Please note that we're intentionally incrementing the state counter
|
||||
# in the graph state as well to demonstrate that the subgraph update
|
||||
# of the same key will not conflict with the parent graph (until
|
||||
subgraph_state = subgraph.invoke(state)
|
||||
return subgraph_state
|
||||
|
||||
Sometimes we want to fork past actions of an agent, and explore different paths through the graph.
|
||||
|
||||
`Editing`, as discussed above, is *exactly* how we do this for the *current* state of the graph!
|
||||
builder = StateGraph(State)
|
||||
builder.add_node("parent_node", parent_node)
|
||||
builder.add_edge(START, "parent_node")
|
||||
|
||||
But, what if we want to fork *past* states of the graph?
|
||||
# A checkpointer must be enabled for interrupts to work!
|
||||
checkpointer = MemorySaver()
|
||||
graph = builder.compile(checkpointer=checkpointer)
|
||||
|
||||
For example, let's say we want to edit a particular checkpoint, `xxx`.
|
||||
config = {
|
||||
"configurable": {
|
||||
"thread_id": uuid.uuid4(),
|
||||
}
|
||||
}
|
||||
|
||||
We pass this `checkpoint_id` when we update the state of the graph.
|
||||
for chunk in graph.stream({"state_counter": 1}, config):
|
||||
print(chunk)
|
||||
|
||||
```python
|
||||
config = {"configurable": {"thread_id": "1", "checkpoint_id": "xxx"}}
|
||||
graph.update_state(config, {"state": "updated state"}, )
|
||||
```
|
||||
print('--- Resuming ---')
|
||||
|
||||
This creates a new forked checkpoint, `xxx-fork`, which we can then run the graph from.
|
||||
for chunk in graph.stream(Command(resume="35"), config):
|
||||
print(chunk)
|
||||
```
|
||||
|
||||
```python
|
||||
config = {'configurable': {'thread_id': '1', 'checkpoint_id': 'xxx-fork'}}
|
||||
for event in graph.stream(None, config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
This will print out
|
||||
|
||||
See [this additional conceptual guide](https://langchain-ai.github.io/langgraph/concepts/persistence/#update-state) for related context on forking.
|
||||
```pycon
|
||||
--- First invocation ---
|
||||
In parent node: {'foo': 'bar'}
|
||||
Entered `parent_node` a total of 1 times
|
||||
Entered `node_in_subgraph` a total of 1 times
|
||||
Entered human_node in sub-graph a total of 1 times
|
||||
{'__interrupt__': (Interrupt(value='what is your name?', resumable=True, ns=['parent_node:0b23d72f-aaba-0329-1a59-ca4f3c8bad3b', 'human_node:25df717c-cb80-57b0-7410-44e20aac8f3c'], when='during'),)}
|
||||
|
||||
See see [this guide](../how-tos/human_in_the_loop/time-travel.ipynb) for a detailed how-to on doing time-travel!
|
||||
--- Resuming ---
|
||||
In parent node: {'foo': 'bar'}
|
||||
Entered `parent_node` a total of 2 times
|
||||
Entered human_node in sub-graph a total of 2 times
|
||||
Got an answer of 35
|
||||
{'parent_node': None}
|
||||
```
|
||||
|
||||
|
||||
|
||||
### Using multiple interrupts
|
||||
|
||||
Using multiple interrupts within a **single** node can be helpful for patterns like [validating human input](#validating-human-input). However, using multiple interrupts in the same node can lead to unexpected behavior if not handled carefully.
|
||||
|
||||
When a node contains multiple interrupt calls, LangGraph keeps a list of resume values specific to the task executing the node. Whenever execution resumes, it starts at the beginning of the node. For each interrupt encountered, LangGraph checks if a matching value exists in the task's resume list. Matching is **strictly index-based**, so the order of interrupt calls within the node is critical.
|
||||
|
||||
To avoid issues, refrain from dynamically changing the node's structure between executions. This includes adding, removing, or reordering interrupt calls, as such changes can result in mismatched indices. These problems often arise from unconventional patterns, such as mutating state via `Command(resume=..., update=SOME_STATE_MUTATION)` or relying on global variables to modify the node’s structure dynamically.
|
||||
|
||||
??? "Example of incorrect code"
|
||||
|
||||
```python
|
||||
import uuid
|
||||
from typing import TypedDict, Optional
|
||||
|
||||
from langgraph.graph import StateGraph
|
||||
from langgraph.constants import START
|
||||
from langgraph.types import interrupt, Command
|
||||
from langgraph.checkpoint.memory import MemorySaver
|
||||
|
||||
|
||||
class State(TypedDict):
|
||||
"""The graph state."""
|
||||
|
||||
age: Optional[str]
|
||||
name: Optional[str]
|
||||
|
||||
|
||||
def human_node(state: State):
|
||||
if not state.get('name'):
|
||||
name = interrupt("what is your name?")
|
||||
else:
|
||||
name = "N/A"
|
||||
|
||||
if not state.get('age'):
|
||||
age = interrupt("what is your age?")
|
||||
else:
|
||||
age = "N/A"
|
||||
|
||||
print(f"Name: {name}. Age: {age}")
|
||||
|
||||
return {
|
||||
"age": age,
|
||||
"name": name,
|
||||
}
|
||||
|
||||
|
||||
builder = StateGraph(State)
|
||||
builder.add_node("human_node", human_node)
|
||||
builder.add_edge(START, "human_node")
|
||||
|
||||
# A checkpointer must be enabled for interrupts to work!
|
||||
checkpointer = MemorySaver()
|
||||
graph = builder.compile(checkpointer=checkpointer)
|
||||
|
||||
config = {
|
||||
"configurable": {
|
||||
"thread_id": uuid.uuid4(),
|
||||
}
|
||||
}
|
||||
|
||||
for chunk in graph.stream({"age": None, "name": None}, config):
|
||||
print(chunk)
|
||||
|
||||
for chunk in graph.stream(Command(resume="John", update={"name": "foo"}), config):
|
||||
print(chunk)
|
||||
```
|
||||
|
||||
```pycon
|
||||
{'__interrupt__': (Interrupt(value='what is your name?', resumable=True, ns=['human_node:3a007ef9-c30d-c357-1ec1-86a1a70d8fba'], when='during'),)}
|
||||
Name: N/A. Age: John
|
||||
{'human_node': {'age': 'John', 'name': 'N/A'}}
|
||||
```
|
||||
|
||||
## Additional Resources 📚
|
||||
|
||||
- [**Conceptual Guide: Persistence**](persistence.md#replay): Read the persistence guide for more context on replaying.
|
||||
- [**How to Guides: Human-in-the-loop**](../how-tos/index.md#human-in-the-loop): Learn how to implement human-in-the-loop workflows in LangGraph.
|
||||
- [**How to implement multi-turn conversations**](../how-tos/multi-agent-multi-turn-convo.ipynb): Learn how to implement multi-turn conversations in LangGraph.
|
||||
|
||||
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|
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|
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|
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@@ -24,7 +24,9 @@ The conceptual guide does not cover step-by-step instructions or specific implem
|
||||
- [LangGraph Glossary](low_level.md): LangGraph workflows are designed as graphs, with nodes representing different components and edges representing the flow of information between them. This guide provides an overview of the key concepts associated with LangGraph graph primitives.
|
||||
- [Common Agentic Patterns](agentic_concepts.md): An agent uses an LLM to pick its own control flow to solve more complex problems! Agents are a key building block in many LLM applications. This guide explains the different types of agent architectures and how they can be used to control the flow of an application.
|
||||
- [Multi-Agent Systems](multi_agent.md): Complex LLM applications can often be broken down into multiple agents, each responsible for a different part of the application. This guide explains common patterns for building multi-agent systems.
|
||||
- [Breakpoints](breakpoints.md): Breakpoints allow pausing the execution of a graph at specific points. Breakpoints allow stepping through graph execution for debugging purposes.
|
||||
- [Human-in-the-Loop](human_in_the_loop.md): Explains different ways of integrating human feedback into a LangGraph application.
|
||||
- [Time Travel](time-travel.md): Time travel allows you to replay past actions in your LangGraph application to explore alternative paths and debug issues.
|
||||
- [Persistence](persistence.md): LangGraph has a built-in persistence layer, implemented through checkpointers. This persistence layer helps to support powerful capabilities like human-in-the-loop, memory, time travel, and fault-tolerance.
|
||||
- [Memory](memory.md): Memory in AI applications refers to the ability to process, store, and effectively recall information from past interactions. With memory, your agents can learn from feedback and adapt to users' preferences.
|
||||
- [Streaming](streaming.md): Streaming is crucial for enhancing the responsiveness of applications built on LLMs. By displaying output progressively, even before a complete response is ready, streaming significantly improves user experience (UX), particularly when dealing with the latency of LLMs.
|
||||
|
||||
@@ -21,6 +21,18 @@ See the [how-to guide](../cloud/deployment/cloud.md#create-new-deployment) for c
|
||||
| Development | 1 CPU | 1 GB | Up to 1 container |
|
||||
| Production | 1 CPU | 2 GB | Up to 10 containers |
|
||||
|
||||
## Autoscaling
|
||||
`Production` type deployments automatically scale up to 10 containers. Scaling is based on the current request load for a single container. Specifically, the autoscaling implementation scales the deployment so that each container is processing about 10 concurrent requests. For example...
|
||||
|
||||
- If the deployment is processing 20 concurrent requests, the deployment will scale up from 1 container to 2 containers (20 requests / 2 containers = 10 requests per container).
|
||||
- If a deployment of 2 containers is processing 10 requests, the deployment will scale down from 2 containers to 1 container (10 requests / 1 container = 10 requests per container).
|
||||
|
||||
10 concurrent requests per container is the target threshold. However, 10 concurrent requests per container is not a hard limit. The number of concurrent requests can exceed 10 if there is a sudden burst of requests.
|
||||
|
||||
Scale down actions are delayed for 30 minutes before any action is taken. In other words, if the autoscaling implementation decides to scale down a deployment, it will first wait for 30 minutes before scaling down. After 30 minutes, the concurrency metric is recomputed and the deployment will scale down if the concurrency metric has met the target threshold. Otherwise, the deployment remains scaled up. This "cool down" period ensures that deployments do not scale up and down too frequently.
|
||||
|
||||
In the future, the autoscaling implementation may evolve to accommodate other metrics such as background run queue size.
|
||||
|
||||
## Revision
|
||||
|
||||
A revision is an iteration of a [deployment](#deployment). When a new deployment is created, an initial revision is automatically created. To deploy new code changes or update environment variable configurations for a deployment, a new revision must be created. When a revision is created, a new container image is built automatically.
|
||||
@@ -31,6 +43,12 @@ See the [how-to guide](../cloud/deployment/cloud.md#create-new-revision) for cre
|
||||
|
||||
Infrastructure for [deployments](#deployment) and [revisions](#revision) are provisioned and deployed asynchronously. They are not deployed immediately after submission. Currently, deployment can take up to several minutes.
|
||||
|
||||
- When a new deployment is created, a new database is created for the deployment. Database creation is a one-time step. This step contributes to a longer deployment time for the initial revision of the deployment.
|
||||
- When a subsequent revision is created for a deployment, there is no database creation step. The deployment time for a subsequent revision is significantly faster compared to the deployment time of the initial revision.
|
||||
- The deployment process for each revision contains a build step, which can take up to a few minutes.
|
||||
|
||||
!!! info "Database creation for `Development` type deployments takes longer than database creation for `Production` type deployments."
|
||||
|
||||
## Architecture
|
||||
|
||||
!!! warning "Subject to Change"
|
||||
@@ -40,7 +58,6 @@ A high-level diagram of a Cloud SaaS deployment.
|
||||
|
||||

|
||||
|
||||
|
||||
## Related
|
||||
|
||||
- [Deployment Options](./deployment_options.md)
|
||||
|
||||
@@ -353,6 +353,12 @@ def my_node(state: State) -> Command[Literal["my_other_node"]]:
|
||||
|
||||
Check out this [how-to guide](../how-tos/command.ipynb) for an end-to-end example of how to use `Command`.
|
||||
|
||||
### When should I use Command instead of conditional edges?
|
||||
|
||||
Use `Command` when you need to **both** update the graph state **and** route to a different node. For example, when implementing [multi-agent handoffs](./multi_agent.md#handoffs) where it's important to route to a different agent and pass some information to that agent.
|
||||
|
||||
Use [conditional edges](#conditional-edges) to route between nodes conditionally without updating the state.
|
||||
|
||||
### Using inside tools
|
||||
|
||||
A common use case is updating graph state from inside a tool. For example, in a customer support application you might want to look up customer information based on their account number or ID in the beginning of the conversation. To update the graph state from the tool, you can return `Command(update={"my_custom_key": "foo", "messages": [...]})` from the tool:
|
||||
@@ -377,6 +383,10 @@ def lookup_user_info(tool_call_id: Annotated[str, InjectedToolCallId], config: R
|
||||
|
||||
If you are using tools that update state via `Command`, we recommend using prebuilt [`ToolNode`][langgraph.prebuilt.tool_node.ToolNode] which automatically handles tools returning `Command` objects and propagates them to the graph state. If you're writing a custom node that calls tools, you would need to manually propagate `Command` objects returned by the tools as the update from node.
|
||||
|
||||
### Human-in-the-loop
|
||||
|
||||
`Command` is an important part of human-in-the-loop workflows: when using `interrupt()` to collect user input, `Command` is then used to supply the input and resume execution via `Command(resume="User input")`. Check out [this conceptual guide](./human_in_the_loop.md) for more information.
|
||||
|
||||
## Persistence
|
||||
|
||||
LangGraph provides built-in persistence for your agent's state using [checkpointers][langgraph.checkpoint.base.BaseCheckpointSaver]. Checkpointers save snapshots of the graph state at every superstep, allowing resumption at any time. This enables features like human-in-the-loop interactions, memory management, and fault-tolerance. You can even directly manipulate a graph's state after its execution using the
|
||||
@@ -442,35 +452,32 @@ graph.invoke(inputs, config={"recursion_limit": 5, "configurable":{"llm": "anthr
|
||||
|
||||
Read [this how-to](https://langchain-ai.github.io/langgraph/how-tos/recursion-limit/) to learn more about how the recursion limit works.
|
||||
|
||||
## `interrupt`
|
||||
|
||||
Use the [interrupt](../reference/types.md/#langgraph.types.interrupt) function to **pause** the graph at specific points to collect user input. The `interrupt` function surfaces interrupt information to the client, allowing the developer to collect user input, validate the graph state, or make decisions before resuming execution.
|
||||
|
||||
```python
|
||||
from langgraph.types import interrupt
|
||||
|
||||
def human_approval_node(state: State):
|
||||
...
|
||||
answer = interrupt(
|
||||
# This value will be sent to the client.
|
||||
# It can be any JSON serializable value.
|
||||
{"question": "is it ok to continue?"},
|
||||
)
|
||||
...
|
||||
```
|
||||
|
||||
Resuming the graph is done by passing a [`Command`](#command) object to the graph with the `resume` key set to the value returned by the `interrupt` function.
|
||||
|
||||
Read more about how the `interrupt` is used for **human-in-the-loop** workflows in the [Human-in-the-loop conceptual guide](./human_in_the_loop.md).
|
||||
|
||||
## Breakpoints
|
||||
|
||||
It can often be useful to set breakpoints before or after certain nodes execute. This can be used to wait for human approval before continuing. These can be set when you ["compile" a graph](#compiling-your-graph). You can set breakpoints either _before_ a node executes (using `interrupt_before`) or after a node executes (using `interrupt_after`.)
|
||||
Breakpoints pause graph execution at specific points and enable stepping through execution step by step. Breakpoints are powered by LangGraph's [**persistence layer**](./persistence.md), which saves the state after each graph step. Breakpoints can also be used to enable [**human-in-the-loop**](./human_in_the_loop.md) workflows, though we recommend using the [`interrupt` function](#interrupt-function) for this purpose.
|
||||
|
||||
You **MUST** use a [checkpointer](./persistence.md) when using breakpoints. This is because your graph needs to be able to resume execution.
|
||||
|
||||
In order to resume execution, you can just invoke your graph with `None` as the input.
|
||||
|
||||
```python
|
||||
# Initial run of graph
|
||||
graph.invoke(inputs, config=config)
|
||||
|
||||
# Let's assume it hit a breakpoint somewhere, you can then resume by passing in None
|
||||
graph.invoke(None, config=config)
|
||||
```
|
||||
|
||||
See [this guide](../how-tos/human_in_the_loop/breakpoints.ipynb) for a full walkthrough of how to add breakpoints.
|
||||
|
||||
### Dynamic Breakpoints
|
||||
|
||||
It may be helpful to **dynamically** interrupt the graph from inside a given node based on some condition. In `LangGraph` you can do so by using `NodeInterrupt` -- a special exception that can be raised from inside a node.
|
||||
|
||||
```python
|
||||
def my_node(state: State) -> State:
|
||||
if len(state['input']) > 5:
|
||||
raise NodeInterrupt(f"Received input that is longer than 5 characters: {state['input']}")
|
||||
|
||||
return state
|
||||
```
|
||||
Read more about breakpoints in the [Breakpoints conceptual guide](./breakpoints.md).
|
||||
|
||||
## Subgraphs
|
||||
|
||||
@@ -511,7 +518,7 @@ The simplest way to create subgraph nodes is by using a [compiled subgraph](#com
|
||||
If you pass extra keys to the subgraph node (i.e., in addition to the shared keys), they will be ignored by the subgraph node. Similarly, if you return extra keys from the subgraph, they will be ignored by the parent graph.
|
||||
|
||||
```python
|
||||
from langgraph.graph import START, StateGraph
|
||||
from langgraph.graph import StateGraph
|
||||
from typing import TypedDict
|
||||
|
||||
class State(TypedDict):
|
||||
|
||||
@@ -98,7 +98,7 @@ This is a special case of updating the graph state from tools where in addition
|
||||
```python
|
||||
def call_tools(state):
|
||||
...
|
||||
commands = [tools_by_name[call["name"].invoke(call, config={"coerce_tool_content": False}) for tool_call in tool_calls]
|
||||
commands = [tools_by_name[tool_call["name"]].invoke(tool_call) for tool_call in tool_calls]
|
||||
return commands
|
||||
```
|
||||
|
||||
@@ -153,7 +153,7 @@ network = builder.compile()
|
||||
|
||||
### Supervisor
|
||||
|
||||
In this architecture, we define agents as nodes and add a supervisor node (LLM) that decides which agent nodes should be called next. We use [conditional edges](./low_level.md#conditional-edges) to route execution to the appropriate agent node based on supervisor's decision. This architecture also lends itself well to running multiple agents in parallel or using [map-reduce](../how-tos/map-reduce.ipynb) pattern.
|
||||
In this architecture, we define agents as nodes and add a supervisor node (LLM) that decides which agent nodes should be called next. We use [`Command`](./low_level.md#command) to route execution to the appropriate agent node based on supervisor's decision. This architecture also lends itself well to running multiple agents in parallel or using [map-reduce](../how-tos/map-reduce.ipynb) pattern.
|
||||
|
||||
```python
|
||||
from typing import Literal
|
||||
|
||||
@@ -168,7 +168,7 @@ Importantly, LangGraph knows whether a particular checkpoint has been executed p
|
||||
|
||||
### Update state
|
||||
|
||||
In addition to re-playing the graph from specific `checkpoints`, we can also *edit* the graph state. We do this using `graph.update_state()`. This method three different arguments:
|
||||
In addition to re-playing the graph from specific `checkpoints`, we can also *edit* the graph state. We do this using `graph.update_state()`. This method accepts three different arguments:
|
||||
|
||||
#### `config`
|
||||
|
||||
@@ -222,7 +222,7 @@ The final thing you can optionally specify when calling `update_state` is `as_no
|
||||
|
||||
A [state schema](low_level.md#schema) specifies a set of keys that are populated as a graph is executed. As discussed above, state can be written by a checkpointer to a thread at each graph step, enabling state persistence.
|
||||
|
||||
But, what if we want to retrain some information *across threads*? Consider the case of a chatbot where we want to retain specific information about the user across *all* chat conversations (e.g., threads) with that user!
|
||||
But, what if we want to retain some information *across threads*? Consider the case of a chatbot where we want to retain specific information about the user across *all* chat conversations (e.g., threads) with that user!
|
||||
|
||||
With checkpointers alone, we cannot share information across threads. This motivates the need for the [`Store`](../reference/store.md#langgraph.store.base.BaseStore) interface. As an illustration, we can define an `InMemoryStore` to store information about a user across threads. We simply compile our graph with a checkpointer, as before, and with our new `in_memory_store` variable.
|
||||
|
||||
@@ -471,7 +471,7 @@ Second, checkpointers allow for ["memory"](agentic_concepts.md#memory) between i
|
||||
|
||||
### Time Travel
|
||||
|
||||
Third, checkpointers allow for ["time travel"](../how-tos/human_in_the_loop/time-travel.ipynb), allowing users to replay prior graph executions to review and / or debug specific graph steps. In addition, checkpointers make it possible to fork the graph state at arbitrary checkpoints to explore alternative trajectories.
|
||||
Third, checkpointers allow for ["time travel"](time-travel.md), allowing users to replay prior graph executions to review and / or debug specific graph steps. In addition, checkpointers make it possible to fork the graph state at arbitrary checkpoints to explore alternative trajectories.
|
||||
|
||||
### Fault-tolerance
|
||||
|
||||
|
||||
@@ -0,0 +1,72 @@
|
||||
# Time Travel ⏱️
|
||||
|
||||
!!! note "Prerequisites"
|
||||
|
||||
This guide assumes that you are familiar with LangGraph's checkpoints and states. If not, please review the [persistence](./persistence.md) concept first.
|
||||
|
||||
|
||||
When working with non-deterministic systems that make model-based decisions (e.g., agents powered by LLMs), it can be useful to examine their decision-making process in detail:
|
||||
|
||||
1. 🤔 **Understand Reasoning**: Analyze the steps that led to a successful result.
|
||||
2. 🐞 **Debug Mistakes**: Identify where and why errors occurred.
|
||||
3. 🔍 **Explore Alternatives**: Test different paths to uncover better solutions.
|
||||
|
||||
We call these debugging techniques **Time Travel**, composed of two key actions: [**Replaying**](#replaying) 🔁 and [**Forking**](#forking) 🔀 .
|
||||
|
||||
## Replaying
|
||||
|
||||

|
||||
|
||||
Replaying allows us to revisit and reproduce an agent's past actions. This can be done either from the current state (or checkpoint) of the graph or from a specific checkpoint.
|
||||
|
||||
To replay from the current state, simply pass `None` as the input along with a `thread`:
|
||||
|
||||
```python
|
||||
thread = {"configurable": {"thread_id": "1"}}
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
To replay actions from a specific checkpoint, start by retrieving all checkpoints for the thread:
|
||||
|
||||
```python
|
||||
all_checkpoints = []
|
||||
for state in graph.get_state_history(thread):
|
||||
all_checkpoints.append(state)
|
||||
```
|
||||
|
||||
Each checkpoint has a unique ID. After identifying the desired checkpoint, for instance, `xyz`, include its ID in the configuration:
|
||||
|
||||
```python
|
||||
config = {'configurable': {'thread_id': '1', 'checkpoint_id': 'xyz'}}
|
||||
for event in graph.stream(None, config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
The graph efficiently replays previously executed nodes instead of re-executing them, leveraging its awareness of prior checkpoint executions.
|
||||
|
||||
## Forking
|
||||
|
||||

|
||||
|
||||
Forking allows you to revisit an agent's past actions and explore alternative paths within the graph.
|
||||
|
||||
To edit a specific checkpoint, such as `xyz`, provide its `checkpoint_id` when updating the graph's state:
|
||||
|
||||
```python
|
||||
config = {"configurable": {"thread_id": "1", "checkpoint_id": "xyz"}}
|
||||
graph.update_state(config, {"state": "updated state"})
|
||||
```
|
||||
|
||||
This creates a new forked checkpoint, xyz-fork, from which you can continue running the graph:
|
||||
|
||||
```python
|
||||
config = {'configurable': {'thread_id': '1', 'checkpoint_id': 'xyz-fork'}}
|
||||
for event in graph.stream(None, config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
## Additional Resources 📚
|
||||
|
||||
- [**Conceptual Guide: Persistence**](https://langchain-ai.github.io/langgraph/concepts/persistence/#replay): Read the persistence guide for more context on replaying.
|
||||
- [**How to View and Update Past Graph State**](../how-tos/human_in_the_loop/time-travel.ipynb): Step-by-step instructions for working with graph state that demonstrate the **replay** and **fork** actions.
|
||||
@@ -0,0 +1,329 @@
|
||||
# Human-in-the-loop
|
||||
|
||||
!!! note "Use the `interrupt` function instead."
|
||||
|
||||
As of LangGraph 0.2.57, the recommended way to set breakpoints is using the [`interrupt` function][langgraph.types.interrupt] as it simplifies **human-in-the-loop** patterns.
|
||||
|
||||
Please see the revised [human-in-the-loop guide](./human_in_the_loop.md) for the latest version that uses the `interrupt` function.
|
||||
|
||||
|
||||
Human-in-the-loop (or "on-the-loop") enhances agent capabilities through several common user interaction patterns.
|
||||
|
||||
Common interaction patterns include:
|
||||
|
||||
(1) `Approval` - We can interrupt our agent, surface the current state to a user, and allow the user to accept an action.
|
||||
|
||||
(2) `Editing` - We can interrupt our agent, surface the current state to a user, and allow the user to edit the agent state.
|
||||
|
||||
(3) `Input` - We can explicitly create a graph node to collect human input and pass that input directly to the agent state.
|
||||
|
||||
Use-cases for these interaction patterns include:
|
||||
|
||||
(1) `Reviewing tool calls` - We can interrupt an agent to review and edit the results of tool calls.
|
||||
|
||||
(2) `Time Travel` - We can manually re-play and / or fork past actions of an agent.
|
||||
|
||||
## Persistence
|
||||
|
||||
All of these interaction patterns are enabled by LangGraph's built-in [persistence](./persistence.md) layer, which will write a checkpoint of the graph state at each step. Persistence allows the graph to stop so that a human can review and / or edit the current state of the graph and then resume with the human's input.
|
||||
|
||||
### Breakpoints
|
||||
|
||||
Adding a [breakpoint](./breakpoints.md) a specific location in the graph flow is one way to enable human-in-the-loop. In this case, the developer knows *where* in the workflow human input is needed and simply places a breakpoint prior to or following that particular graph node.
|
||||
|
||||
Here, we compile our graph with a checkpointer and a breakpoint at the node we want to interrupt before, `step_for_human_in_the_loop`. We then perform one of the above interaction patterns, which will create a new checkpoint if a human edits the graph state. The new checkpoint is saved to the `thread` and we can resume the graph execution from there by passing in `None` as the input.
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before "step_for_human_in_the_loop"
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["step_for_human_in_the_loop"])
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
thread_config = {"configurable": {"thread_id": "1"}}
|
||||
for event in graph.stream(inputs, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# Perform some action that requires human in the loop
|
||||
|
||||
# Continue the graph execution from the current checkpoint
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
### Dynamic Breakpoints
|
||||
|
||||
Alternatively, the developer can define some *condition* that must be met for a breakpoint to be triggered. This concept of [dynamic breakpoints](./breakpoints.md) is useful when the developer wants to halt the graph under *a particular condition*. This uses a `NodeInterrupt`, which is a special type of exception that can be raised from within a node based upon some condition. As an example, we can define a dynamic breakpoint that triggers when the `input` is longer than 5 characters.
|
||||
|
||||
```python
|
||||
def my_node(state: State) -> State:
|
||||
if len(state['input']) > 5:
|
||||
raise NodeInterrupt(f"Received input that is longer than 5 characters: {state['input']}")
|
||||
return state
|
||||
```
|
||||
|
||||
Let's assume we run the graph with an input that triggers the dynamic breakpoint and then attempt to resume the graph execution simply by passing in `None` for the input.
|
||||
|
||||
```python
|
||||
# Attempt to continue the graph execution with no change to state after we hit the dynamic breakpoint
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
The graph will *interrupt* again because this node will be *re-run* with the same graph state. We need to change the graph state such that the condition that triggers the dynamic breakpoint is no longer met. So, we can simply edit the graph state to an input that meets the condition of our dynamic breakpoint (< 5 characters) and re-run the node.
|
||||
|
||||
```python
|
||||
# Update the state to pass the dynamic breakpoint
|
||||
graph.update_state(config=thread_config, values={"input": "foo"})
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
Alternatively, what if we want to keep our current input and skip the node (`my_node`) that performs the check? To do this, we can simply perform the graph update with `as_node="my_node"` and pass in `None` for the values. This will make no update the graph state, but run the update as `my_node`, effectively skipping the node and bypassing the dynamic breakpoint.
|
||||
|
||||
```python
|
||||
# This update will skip the node `my_node` altogether
|
||||
graph.update_state(config=thread_config, values=None, as_node="my_node")
|
||||
for event in graph.stream(None, thread_config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
See [our guide](../how-tos/human_in_the_loop/dynamic_breakpoints.ipynb) for a detailed how-to on doing this!
|
||||
|
||||
## Interaction Patterns
|
||||
|
||||
### Approval
|
||||
|
||||

|
||||
|
||||
Sometimes we want to approve certain steps in our agent's execution.
|
||||
|
||||
We can interrupt our agent at a [breakpoint](./breakpoints.md) prior to the step that we want to approve.
|
||||
|
||||
This is generally recommend for sensitive actions (e.g., using external APIs or writing to a database).
|
||||
|
||||
With persistence, we can surface the current agent state as well as the next step to a user for review and approval.
|
||||
|
||||
If approved, the graph resumes execution from the last saved checkpoint, which is saved to the `thread`:
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before the step to approve
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["node_2"])
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
for event in graph.stream(inputs, thread, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# ... Get human approval ...
|
||||
|
||||
# If approved, continue the graph execution from the last saved checkpoint
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
See [our guide](../how-tos/human_in_the_loop/breakpoints.ipynb) for a detailed how-to on doing this!
|
||||
|
||||
### Editing
|
||||
|
||||

|
||||
|
||||
Sometimes we want to review and edit the agent's state.
|
||||
|
||||
As with approval, we can interrupt our agent at a [breakpoint](./breakpoints.md) prior to the step we want to check.
|
||||
|
||||
We can surface the current state to a user and allow the user to edit the agent state.
|
||||
|
||||
This can, for example, be used to correct the agent if it made a mistake (e.g., see the section on tool calling below).
|
||||
|
||||
We can edit the graph state by forking the current checkpoint, which is saved to the `thread`.
|
||||
|
||||
We can then proceed with the graph from our forked checkpoint as done before.
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before the step to review
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["node_2"])
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
for event in graph.stream(inputs, thread, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# Review the state, decide to edit it, and create a forked checkpoint with the new state
|
||||
graph.update_state(thread, {"state": "new state"})
|
||||
|
||||
# Continue the graph execution from the forked checkpoint
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
See [this guide](../how-tos/human_in_the_loop/edit-graph-state.ipynb) for a detailed how-to on doing this!
|
||||
|
||||
### Input
|
||||
|
||||

|
||||
|
||||
Sometimes we want to explicitly get human input at a particular step in the graph.
|
||||
|
||||
We can create a graph node designated for this (e.g., `human_input` in our example diagram).
|
||||
|
||||
As with approval and editing, we can interrupt our agent at a [breakpoint](./breakpoints.md) prior to this node.
|
||||
|
||||
We can then perform a state update that includes the human input, just as we did with editing state.
|
||||
|
||||
But, we add one thing:
|
||||
|
||||
We can use `as_node=human_input` with the state update to specify that the state update *should be treated as a node*.
|
||||
|
||||
The is subtle, but important:
|
||||
|
||||
With editing, the user makes a decision about whether or not to edit the graph state.
|
||||
|
||||
With input, we explicitly define a node in our graph for collecting human input!
|
||||
|
||||
The state update with the human input then runs *as this node*.
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before the step to to collect human input
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["human_input"])
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
for event in graph.stream(inputs, thread, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# Update the state with the user input as if it was the human_input node
|
||||
graph.update_state(thread, {"user_input": user_input}, as_node="human_input")
|
||||
|
||||
# Continue the graph execution from the checkpoint created by the human_input node
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
See [this guide](../how-tos/human_in_the_loop/wait-user-input.ipynb) for a detailed how-to on doing this!
|
||||
|
||||
## Use-cases
|
||||
|
||||
### Reviewing Tool Calls
|
||||
|
||||
Some user interaction patterns combine the above ideas.
|
||||
|
||||
For example, many agents use [tool calling](https://python.langchain.com/docs/how_to/tool_calling/) to make decisions.
|
||||
|
||||
Tool calling presents a challenge because the agent must get two things right:
|
||||
|
||||
(1) The name of the tool to call
|
||||
|
||||
(2) The arguments to pass to the tool
|
||||
|
||||
Even if the tool call is correct, we may also want to apply discretion:
|
||||
|
||||
(3) The tool call may be a sensitive operation that we want to approve
|
||||
|
||||
With these points in mind, we can combine the above ideas to create a human-in-the-loop review of a tool call.
|
||||
|
||||
```python
|
||||
# Compile our graph with a checkpointer and a breakpoint before the step to to review the tool call from the LLM
|
||||
graph = builder.compile(checkpointer=checkpointer, interrupt_before=["human_review"])
|
||||
|
||||
# Run the graph up to the breakpoint
|
||||
for event in graph.stream(inputs, thread, stream_mode="values"):
|
||||
print(event)
|
||||
|
||||
# Review the tool call and update it, if needed, as the human_review node
|
||||
graph.update_state(thread, {"tool_call": "updated tool call"}, as_node="human_review")
|
||||
|
||||
# Otherwise, approve the tool call and proceed with the graph execution with no edits
|
||||
|
||||
# Continue the graph execution from either:
|
||||
# (1) the forked checkpoint created by human_review or
|
||||
# (2) the checkpoint saved when the tool call was originally made (no edits in human_review)
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
See [this guide](../how-tos/human_in_the_loop/review-tool-calls.ipynb) for a detailed how-to on doing this!
|
||||
|
||||
### Time Travel
|
||||
|
||||
When working with agents, we often want closely examine their decision making process:
|
||||
|
||||
(1) Even when they arrive a desired final result, the reasoning that led to that result is often important to examine.
|
||||
|
||||
(2) When agents make mistakes, it is often valuable to understand why.
|
||||
|
||||
(3) In either of the above cases, it is useful to manually explore alternative decision making paths.
|
||||
|
||||
Collectively, we call these debugging concepts `time-travel` and they are composed of `replaying` and `forking`.
|
||||
|
||||
#### Replaying
|
||||
|
||||

|
||||
|
||||
Sometimes we want to simply replay past actions of an agent.
|
||||
|
||||
Above, we showed the case of executing an agent from the current state (or checkpoint) of the graph.
|
||||
|
||||
We by simply passing in `None` for the input with a `thread`.
|
||||
|
||||
```
|
||||
thread = {"configurable": {"thread_id": "1"}}
|
||||
for event in graph.stream(None, thread, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
Now, we can modify this to replay past actions from a *specific* checkpoint by passing in the checkpoint ID.
|
||||
|
||||
To get a specific checkpoint ID, we can easily get all of the checkpoints in the thread and filter to the one we want.
|
||||
|
||||
```python
|
||||
all_checkpoints = []
|
||||
for state in app.get_state_history(thread):
|
||||
all_checkpoints.append(state)
|
||||
```
|
||||
|
||||
Each checkpoint has a unique ID, which we can use to replay from a specific checkpoint.
|
||||
|
||||
Assume from reviewing the checkpoints that we want to replay from one, `xxx`.
|
||||
|
||||
We just pass in the checkpoint ID when we run the graph.
|
||||
|
||||
```python
|
||||
config = {'configurable': {'thread_id': '1', 'checkpoint_id': 'xxx'}}
|
||||
for event in graph.stream(None, config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
Importantly, the graph knows which checkpoints have been previously executed.
|
||||
|
||||
So, it will re-play any previously executed nodes rather than re-executing them.
|
||||
|
||||
See [this additional conceptual guide](https://langchain-ai.github.io/langgraph/concepts/persistence/#replay) for related context on replaying.
|
||||
|
||||
See see [this guide](../how-tos/human_in_the_loop/time-travel.ipynb) for a detailed how-to on doing time-travel!
|
||||
|
||||
#### Forking
|
||||
|
||||

|
||||
|
||||
Sometimes we want to fork past actions of an agent, and explore different paths through the graph.
|
||||
|
||||
`Editing`, as discussed above, is *exactly* how we do this for the *current* state of the graph!
|
||||
|
||||
But, what if we want to fork *past* states of the graph?
|
||||
|
||||
For example, let's say we want to edit a particular checkpoint, `xxx`.
|
||||
|
||||
We pass this `checkpoint_id` when we update the state of the graph.
|
||||
|
||||
```python
|
||||
config = {"configurable": {"thread_id": "1", "checkpoint_id": "xxx"}}
|
||||
graph.update_state(config, {"state": "updated state"}, )
|
||||
```
|
||||
|
||||
This creates a new forked checkpoint, `xxx-fork`, which we can then run the graph from.
|
||||
|
||||
```python
|
||||
config = {'configurable': {'thread_id': '1', 'checkpoint_id': 'xxx-fork'}}
|
||||
for event in graph.stream(None, config, stream_mode="values"):
|
||||
print(event)
|
||||
```
|
||||
|
||||
See [this additional conceptual guide](https://langchain-ai.github.io/langgraph/concepts/persistence/#update-state) for related context on forking.
|
||||
|
||||
See [this guide](../how-tos/human_in_the_loop/time-travel.ipynb) for a detailed how-to on doing time-travel!
|
||||
@@ -12,6 +12,14 @@
|
||||
"source": [
|
||||
"# How to add breakpoints\n",
|
||||
"\n",
|
||||
"!!! tip \"Prerequisites\"\n",
|
||||
"\n",
|
||||
" This guide assumes familiarity with the following concepts:\n",
|
||||
"\n",
|
||||
" * [Breakpoints](../../../concepts/breakpoints)\n",
|
||||
" * [LangGraph Glossary](../../../concepts/low_level)\n",
|
||||
" \n",
|
||||
"\n",
|
||||
"Human-in-the-loop (HIL) interactions are crucial for [agentic systems](https://langchain-ai.github.io/langgraph/concepts/agentic_concepts/#human-in-the-loop). [Breakpoints](https://langchain-ai.github.io/langgraph/concepts/low_level/#breakpoints) are a common HIL interaction pattern, allowing the graph to stop at specific steps and seek human approval before proceeding (e.g., for sensitive actions). \n",
|
||||
"\n",
|
||||
"Breakpoints are built on top of LangGraph [checkpoints](https://langchain-ai.github.io/langgraph/concepts/low_level/#checkpointer), which save the graph's state after each node execution. Checkpoints are saved in [threads](https://langchain-ai.github.io/langgraph/concepts/low_level/#threads) that preserve graph state and can be accessed after a graph has finished execution. This allows for graph execution to pause at specific points, await human approval, and then resume execution from the last checkpoint.\n",
|
||||
@@ -467,7 +475,7 @@
|
||||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.11.8"
|
||||
"version": "3.11.4"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
||||
@@ -1,24 +1,32 @@
|
||||
{
|
||||
"cells": [
|
||||
{
|
||||
"attachments": {},
|
||||
"cell_type": "markdown",
|
||||
"id": "ee54cde3-7e4d-43f4-b921-e7141ea0f19e",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# How to add dynamic breakpoints"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "607849c6-4b8c-4e06-ad9c-758bb5a08e86",
|
||||
"id": "b7d5f6a5-9e59-43e4-a4b6-8ada6dace691",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# How to add dynamic breakpoints with `NodeInterrupt`\n",
|
||||
"\n",
|
||||
"!!! note\n",
|
||||
"\n",
|
||||
" For **human-in-the-loop** workflows use the new [`interrupt()`](../../../reference/types/#langgraph.types.interrupt) function for **human-in-the-loop** workflows. Please review the [Human-in-the-loop conceptual guide](../../../concepts/human_in_the_loop) for more information about design patterns with `interrupt`.\n",
|
||||
"\n",
|
||||
"!!! tip \"Prerequisites\"\n",
|
||||
"\n",
|
||||
" This guide assumes familiarity with the following concepts:\n",
|
||||
"\n",
|
||||
" * [Breakpoints](../../../concepts/breakpoints)\n",
|
||||
" * [LangGraph Glossary](../../../concepts/low_level)\n",
|
||||
" \n",
|
||||
"\n",
|
||||
"Human-in-the-loop (HIL) interactions are crucial for [agentic systems](https://langchain-ai.github.io/langgraph/concepts/agentic_concepts/#human-in-the-loop). [Breakpoints](https://langchain-ai.github.io/langgraph/concepts/low_level/#breakpoints) are a common HIL interaction pattern, allowing the graph to stop at specific steps and seek human approval before proceeding (e.g., for sensitive actions).\n",
|
||||
"\n",
|
||||
"In LangGraph you can add breakpoints before / after a node is executed. But oftentimes it may be helpful to **dynamically** interrupt the graph from inside a given node based on some condition. When doing so, it may also be helpful to include information about **why** that interrupt was raised.\n",
|
||||
"\n",
|
||||
"This guide shows how you can dynamically interrupt the graph using `NodeInterrupt` -- a special exception that can be raised from inside a node. Let's see it in action!\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"## Setup\n",
|
||||
"\n",
|
||||
"First, let's install the required packages"
|
||||
@@ -430,7 +438,7 @@
|
||||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.11.9"
|
||||
"version": "3.11.4"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
||||
@@ -12,6 +12,12 @@
|
||||
"source": [
|
||||
"# How to edit graph state\n",
|
||||
"\n",
|
||||
"!!! tip \"Prerequisites\"\n",
|
||||
"\n",
|
||||
" * [Human-in-the-loop](../../../concepts/human_in_the_loop)\n",
|
||||
" * [Breakpoints](../../../concepts/breakpoints)\n",
|
||||
" * [LangGraph Glossary](../../../concepts/low_level)\n",
|
||||
"\n",
|
||||
"Human-in-the-loop (HIL) interactions are crucial for [agentic systems](https://langchain-ai.github.io/langgraph/concepts/agentic_concepts/#human-in-the-loop). Manually updating the graph state a common HIL interaction pattern, allowing the human to edit actions (e.g., what tool is being called or how it is being called).\n",
|
||||
"\n",
|
||||
"We can implement this in LangGraph using a [breakpoint](https://langchain-ai.github.io/langgraph/how-tos/human_in_the_loop/breakpoints/): breakpoints allow us to interrupt graph execution before a specific step. At this breakpoint, we can manually update the graph state and then resume from that spot to continue. \n",
|
||||
@@ -554,7 +560,7 @@
|
||||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.11.8"
|
||||
"version": "3.11.4"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
||||
File diff suppressed because one or more lines are too long
@@ -7,6 +7,15 @@
|
||||
"source": [
|
||||
"# How to view and update past graph state\n",
|
||||
"\n",
|
||||
"!!! tip \"Prerequisites\"\n",
|
||||
"\n",
|
||||
" This guide assumes familiarity with the following concepts:\n",
|
||||
"\n",
|
||||
" * [Time Travel](../../../concepts/time-travel)\n",
|
||||
" * [Breakpoints](../../../concepts/breakpoints)\n",
|
||||
" * [LangGraph Glossary](../../../concepts/low_level)\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"Once you start [checkpointing](../../persistence) your graphs, you can easily **get** or **update** the state of the agent at any point in time. This permits a few things:\n",
|
||||
"\n",
|
||||
"1. You can surface a state during an interrupt to a user to let them accept an action.\n",
|
||||
@@ -589,7 +598,7 @@
|
||||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.11.9"
|
||||
"version": "3.11.4"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
||||
File diff suppressed because one or more lines are too long
@@ -30,7 +30,7 @@ These how-to guides show how to achieve that controllability.
|
||||
- [How to add thread-level persistence to subgraphs](subgraph-persistence.ipynb)
|
||||
- [How to add cross-thread persistence to your graph](cross-thread-persistence.ipynb)
|
||||
- [How to use Postgres checkpointer for persistence](persistence_postgres.ipynb)
|
||||
- [How to create a custom checkpointer using MongoDB](persistence_mongodb.ipynb)
|
||||
- [How to use MongoDB checkpointer for persistence](persistence_mongodb.ipynb)
|
||||
- [How to create a custom checkpointer using Redis](persistence_redis.ipynb)
|
||||
|
||||
### Memory
|
||||
@@ -48,12 +48,24 @@ LangGraph makes it easy to manage conversation [memory](../concepts/memory.md) i
|
||||
[Human-in-the-loop](../concepts/human_in_the_loop.md) functionality allows
|
||||
you to involve humans in the decision-making process of your graph. These how-to guides show how to implement human-in-the-loop workflows in your graph.
|
||||
|
||||
- [How to add breakpoints](human_in_the_loop/breakpoints.ipynb)
|
||||
- [How to add dynamic breakpoints](human_in_the_loop/dynamic_breakpoints.ipynb)
|
||||
- [How to edit graph state](human_in_the_loop/edit-graph-state.ipynb)
|
||||
- [How to wait for user input](human_in_the_loop/wait-user-input.ipynb)
|
||||
|
||||
Key workflows:
|
||||
|
||||
- [How to wait for user input](human_in_the_loop/wait-user-input.ipynb): A basic example that shows how to implement a human-in-the-loop workflow in your graph using the `interrupt` function.
|
||||
- [How to review tool calls](human_in_the_loop/review-tool-calls.ipynb): Incorporate human-in-the-loop for reviewing/editing/accepting tool call requests before they executed using the `interrupt` function.
|
||||
|
||||
|
||||
Other methods:
|
||||
|
||||
- [How to add static breakpoints](human_in_the_loop/breakpoints.ipynb): Use for debugging purposes. For [**human-in-the-loop**](../concepts/human_in_the_loop.md) workflows, we recommend the [`interrupt` function][langgraph.types.interrupt] instead.
|
||||
- [How to edit graph state](human_in_the_loop/edit-graph-state.ipynb): Edit graph state using `graph.update_state` method. Use this if implementing a **human-in-the-loop** workflow via **static breakpoints**.
|
||||
- [How to add dynamic breakpoints with `NodeInterrupt`](human_in_the_loop/dynamic_breakpoints.ipynb): **Not recommended**: Use the [`interrupt` function](../concepts/human_in_the_loop.md) instead.
|
||||
|
||||
### Time Travel
|
||||
|
||||
[Time travel](../concepts/time-travel.md) allows you to replay past actions in your LangGraph application to explore alternative paths and debug issues. These how-to guides show how to use time travel in your graph.
|
||||
|
||||
- [How to view and update past graph state](human_in_the_loop/time-travel.ipynb)
|
||||
- [How to review tool calls](human_in_the_loop/review-tool-calls.ipynb)
|
||||
|
||||
### Streaming
|
||||
|
||||
@@ -81,6 +93,7 @@ These how-to guides show common patterns for tool calling with LangGraph:
|
||||
- [How to handle tool calling errors](tool-calling-errors.ipynb)
|
||||
- [How to pass runtime values to tools](pass-run-time-values-to-tools.ipynb)
|
||||
- [How to pass config to tools](pass-config-to-tools.ipynb)
|
||||
- [How to update graph state from tools](update-state-from-tools.ipynb)
|
||||
- [How to handle large numbers of tools](many-tools.ipynb)
|
||||
|
||||
### Subgraphs
|
||||
@@ -93,7 +106,10 @@ These how-to guides show common patterns for tool calling with LangGraph:
|
||||
|
||||
### Multi-agent
|
||||
|
||||
[Multi-agent systems](../concepts/multi_agent.md) are useful to break down complex LLM applications into multiple agents, each responsible for a different part of the application. These how-to guides show how to implement multi-agent systems in LangGraph:
|
||||
|
||||
- [How to build a multi-agent network](multi-agent-network.ipynb)
|
||||
- [How to add multi-turn conversation in a multi-agent application](multi-agent-multi-turn-convo.ipynb)
|
||||
|
||||
See the [multi-agent tutorials](../tutorials/index.md#multi-agent-systems) for implementations of other multi-agent architectures.
|
||||
|
||||
|
||||
File diff suppressed because one or more lines are too long
@@ -133,74 +133,110 @@
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 3,
|
||||
"id": "aa4bdbff-9461-46cc-aee9-8a22d3c3d9ec",
|
||||
"id": "29e2a824-dbeb-4944-9df2-63fdbd883252",
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"from typing_extensions import TypedDict, Literal\n",
|
||||
"\n",
|
||||
"from langchain_openai import ChatOpenAI\n",
|
||||
"from langchain_core.messages import AnyMessage\n",
|
||||
"from langgraph.graph import MessagesState, StateGraph, START, END\n",
|
||||
"from langgraph.types import Command\n",
|
||||
"\n",
|
||||
"model = ChatOpenAI(model=\"gpt-4o\")\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def make_agent_node(*, name: str, destinations: list[str], system_prompt: str):\n",
|
||||
" def agent_node(state: MessagesState) -> Command[Literal[*destinations, END]]:\n",
|
||||
" # define schema for the structured output:\n",
|
||||
" # - model's text response (`response`)\n",
|
||||
" # - name of the node to go to next (or 'finish')\n",
|
||||
" class Response(TypedDict):\n",
|
||||
" response: str\n",
|
||||
" goto: Literal[*destinations, \"finish\"]\n",
|
||||
"# Define a helper for each of the agent nodes to call\n",
|
||||
"def call_llm(messages: list[AnyMessage], target_agent_nodes: list[str]):\n",
|
||||
" \"\"\"Call LLM with structured output to get a natural language response as well as a target agent (node) to go to next.\n",
|
||||
"\n",
|
||||
" messages = [{\"role\": \"system\", \"content\": system_prompt}] + state[\"messages\"]\n",
|
||||
" response = model.with_structured_output(Response).invoke(messages)\n",
|
||||
" goto = response[\"goto\"]\n",
|
||||
" if goto == \"finish\":\n",
|
||||
" goto = END\n",
|
||||
"\n",
|
||||
" # handoff to another agent or halt\n",
|
||||
" ai_msg = {\"role\": \"ai\", \"content\": response[\"response\"], \"name\": name}\n",
|
||||
" return Command(goto=goto, update={\"messages\": ai_msg})\n",
|
||||
"\n",
|
||||
" return agent_node\n",
|
||||
" Args:\n",
|
||||
" messages: list of messages to pass to the LLM\n",
|
||||
" target_agents: list of the node names of the target agents to navigate to\n",
|
||||
" \"\"\"\n",
|
||||
" # define JSON schema for the structured output:\n",
|
||||
" # - model's text response (`response`)\n",
|
||||
" # - name of the node to go to next (or 'finish')\n",
|
||||
" # see more on structured output here https://python.langchain.com/docs/concepts/structured_outputs\n",
|
||||
" json_schema = {\n",
|
||||
" \"name\": \"Response\",\n",
|
||||
" \"parameters\": {\n",
|
||||
" \"type\": \"object\",\n",
|
||||
" \"properties\": {\n",
|
||||
" \"response\": {\n",
|
||||
" \"type\": \"string\",\n",
|
||||
" \"description\": \"A human readable response to the original question. Does not need to be a final response. Will be streamed back to the user.\",\n",
|
||||
" },\n",
|
||||
" \"goto\": {\n",
|
||||
" \"enum\": [*target_agent_nodes, \"__end__\"],\n",
|
||||
" \"type\": \"string\",\n",
|
||||
" \"description\": \"The next agent to call, or __end__ if the user's query has been resolved. Must be one of the specified values.\",\n",
|
||||
" },\n",
|
||||
" },\n",
|
||||
" \"required\": [\"response\", \"goto\"],\n",
|
||||
" },\n",
|
||||
" }\n",
|
||||
" response = model.with_structured_output(json_schema).invoke(messages)\n",
|
||||
" return response\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"travel_advisor = make_agent_node(\n",
|
||||
" name=\"travel_advisor\",\n",
|
||||
" destinations=[\"sightseeing_advisor\", \"hotel_advisor\"],\n",
|
||||
" system_prompt=(\n",
|
||||
"def travel_advisor(\n",
|
||||
" state: MessagesState,\n",
|
||||
") -> Command[Literal[\"sightseeing_advisor\", \"hotel_advisor\", \"__end__\"]]:\n",
|
||||
" system_prompt = (\n",
|
||||
" \"You are a general travel expert that can recommend travel destinations (e.g. countries, cities, etc). \"\n",
|
||||
" \"If you need specific sightseeing recommendations, ask 'sightseeing_advisor' for help. \"\n",
|
||||
" \"If you need hotel recommendations, ask 'hotel_advisor' for help. \"\n",
|
||||
" \"If you have enough information to respond to the user, return 'finish'. \"\n",
|
||||
" \"Never mention other agents by name.\"\n",
|
||||
" ),\n",
|
||||
")\n",
|
||||
"sightseeing_advisor = make_agent_node(\n",
|
||||
" name=\"sightseeing_advisor\",\n",
|
||||
" destinations=[\"travel_advisor\", \"hotel_advisor\"],\n",
|
||||
" system_prompt=(\n",
|
||||
" )\n",
|
||||
" messages = [{\"role\": \"system\", \"content\": system_prompt}] + state[\"messages\"]\n",
|
||||
" target_agent_nodes = [\"sightseeing_advisor\", \"hotel_advisor\"]\n",
|
||||
" response = call_llm(messages, target_agent_nodes)\n",
|
||||
" ai_msg = {\"role\": \"ai\", \"content\": response[\"response\"], \"name\": \"travel_advisor\"}\n",
|
||||
" # handoff to another agent or halt\n",
|
||||
" return Command(goto=response[\"goto\"], update={\"messages\": ai_msg})\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def sightseeing_advisor(\n",
|
||||
" state: MessagesState,\n",
|
||||
") -> Command[Literal[\"travel_advisor\", \"hotel_advisor\", \"__end__\"]]:\n",
|
||||
" system_prompt = (\n",
|
||||
" \"You are a travel expert that can provide specific sightseeing recommendations for a given destination. \"\n",
|
||||
" \"If you need general travel help, go to 'travel_advisor' for help. \"\n",
|
||||
" \"If you need hotel recommendations, go to 'hotel_advisor' for help. \"\n",
|
||||
" \"If you have enough information to respond to the user, return 'finish'. \"\n",
|
||||
" \"Never mention other agents by name.\"\n",
|
||||
" ),\n",
|
||||
")\n",
|
||||
"hotel_advisor = make_agent_node(\n",
|
||||
" name=\"hotel_advisor\",\n",
|
||||
" destinations=[\"travel_advisor\", \"sightseeing_advisor\"],\n",
|
||||
" system_prompt=(\n",
|
||||
" )\n",
|
||||
" messages = [{\"role\": \"system\", \"content\": system_prompt}] + state[\"messages\"]\n",
|
||||
" target_agent_nodes = [\"travel_advisor\", \"hotel_advisor\"]\n",
|
||||
" response = call_llm(messages, target_agent_nodes)\n",
|
||||
" ai_msg = {\n",
|
||||
" \"role\": \"ai\",\n",
|
||||
" \"content\": response[\"response\"],\n",
|
||||
" \"name\": \"sightseeing_advisor\",\n",
|
||||
" }\n",
|
||||
" # handoff to another agent or halt\n",
|
||||
" return Command(goto=response[\"goto\"], update={\"messages\": ai_msg})\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def hotel_advisor(\n",
|
||||
" state: MessagesState,\n",
|
||||
") -> Command[Literal[\"travel_advisor\", \"sightseeing_advisor\", \"__end__\"]]:\n",
|
||||
" system_prompt = (\n",
|
||||
" \"You are a travel expert that can provide hotel recommendations for a given destination. \"\n",
|
||||
" \"If you need general travel help, ask 'travel_advisor' for help. \"\n",
|
||||
" \"If you need specific sightseeing recommendations, ask 'sightseeing_advisor' for help. \"\n",
|
||||
" \"If you have enough information to respond to the user, return 'finish'. \"\n",
|
||||
" \"Never mention other agents by name.\"\n",
|
||||
" ),\n",
|
||||
")\n",
|
||||
" )\n",
|
||||
" messages = [{\"role\": \"system\", \"content\": system_prompt}] + state[\"messages\"]\n",
|
||||
" target_agent_nodes = [\"travel_advisor\", \"sightseeing_advisor\"]\n",
|
||||
" response = call_llm(messages, target_agent_nodes)\n",
|
||||
" ai_msg = {\"role\": \"ai\", \"content\": response[\"response\"], \"name\": \"hotel_advisor\"}\n",
|
||||
" # handoff to another agent or halt\n",
|
||||
" return Command(goto=response[\"goto\"], update={\"messages\": ai_msg})\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"builder = StateGraph(MessagesState)\n",
|
||||
@@ -254,7 +290,7 @@
|
||||
"name": "stdout",
|
||||
"output_type": "stream",
|
||||
"text": [
|
||||
"{'travel_advisor': {'messages': {'role': 'ai', 'content': 'The Caribbean is a fantastic choice for warm, sunny weather and beautiful beaches. Here are a few destinations you might consider:\\n\\n1. **Jamaica**: Known for its vibrant culture, reggae music, and stunning beaches like Negril and Montego Bay.\\n\\n2. **Bahamas**: With over 700 islands, the Bahamas offers clear turquoise waters and beautiful sandy beaches, perfect for relaxation and water sports.\\n\\n3. **Dominican Republic**: Known for its resorts, beaches, and golfing. Punta Cana and Puerto Plata are popular destinations.\\n\\n4. **Barbados**: Offers beautiful beaches and a rich history, with plenty of activities and festivals.\\n\\n5. **Puerto Rico**: A mix of Spanish heritage and modern resorts, with opportunities for hiking in El Yunque National Forest and enjoying the vibrant nightlife in San Juan.\\n\\n6. **Aruba**: Known for its dry climate and sunny days, with beautiful beaches and activities like snorkeling and diving.\\n\\nEach of these destinations has its own unique charm and appeal. If you need specific sightseeing or hotel recommendations, let me know!', 'name': 'travel_advisor'}}}\n",
|
||||
"{'travel_advisor': {'messages': {'role': 'ai', 'content': 'The Caribbean offers many warm and beautiful destinations. Some popular ones include:\\n\\n1. **Jamaica** - Known for its beautiful beaches, reggae music, and vibrant culture.\\n2. **Bahamas** - Offers stunning beaches and clear turquoise waters, perfect for relaxation and water activities.\\n3. **Barbados** - Known for its friendly locals, delicious cuisine, and beautiful beaches.\\n4. **Dominican Republic** - Offers a mix of beaches, mountains, and historical sites.\\n5. **Aruba** - Known for its dry climate, beautiful beaches, and outdoor activities.\\n\\nWould you like recommendations for sightseeing or hotels in any of these destinations?', 'name': 'travel_advisor'}}}\n",
|
||||
"\n",
|
||||
"\n"
|
||||
]
|
||||
@@ -286,10 +322,13 @@
|
||||
"name": "stdout",
|
||||
"output_type": "stream",
|
||||
"text": [
|
||||
"{'travel_advisor': {'messages': {'role': 'ai', 'content': \"I recommend visiting Barbados for a warm Caribbean getaway. It's known for its beautiful beaches, vibrant culture, and friendly locals. Let me gather some sightseeing and hotel recommendations for you.\", 'name': 'travel_advisor'}}}\n",
|
||||
"{'travel_advisor': {'messages': {'role': 'ai', 'content': 'I recommend visiting Jamaica, a vibrant and warm destination in the Caribbean known for its beautiful beaches, rich culture, and exciting activities.', 'name': 'travel_advisor'}}}\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"{'sightseeing_advisor': {'messages': {'role': 'ai', 'content': \"Barbados is a fantastic destination to experience the warmth of the Caribbean. Here are some things to do and places to stay:\\n\\n### Sightseeing Recommendations:\\n1. **Harrison's Cave**: Explore this stunning limestone cave with its impressive stalactites and stalagmites. \\n2. **Bathsheba Beach**: Known for its unique rock formations and surf-friendly waves, it's perfect for a day of relaxation and exploration.\\n3. **St. Nicholas Abbey**: Visit this historic plantation house, distillery, and museum for a glimpse into the island's colonial past.\\n4. **Animal Flower Cave**: Located at the northern tip of Barbados, this sea cave offers incredible views and natural rock pools.\\n5. **Oistins Fish Fry**: Experience local culture and cuisine with fresh seafood, music, and dancing every Friday night.\\n\\n### Hotel Recommendations:\\n1. **Sandy Lane**: A luxurious resort offering world-class amenities, golf courses, and a private beach.\\n2. **The Crane Resort**: Known for its historic charm and stunning ocean views, it provides a unique blend of luxury and culture.\\n3. **Sea Breeze Beach House**: Offers an all-inclusive experience with multiple dining options and beachfront access.\\n4. **The House by Elegant Hotels**: A boutique, adults-only hotel perfect for a romantic getaway with personalized service and beachfront location.\\n\\nEnjoy your trip to Barbados!\", 'name': 'sightseeing_advisor'}}}\n",
|
||||
"{'sightseeing_advisor': {'messages': {'role': 'ai', 'content': \"For a warm and vibrant Caribbean destination, I recommend Jamaica. It's renowned for its stunning beaches, lively culture, and exciting activities.\\n\\n### Things to Do in Jamaica:\\n1. **Explore Dunn’s River Falls**: A famous waterfall near Ocho Rios where you can climb the terraced steps and enjoy the natural pools.\\n2. **Visit Bob Marley Museum**: Located in Kingston, this museum offers a deep dive into the life of the reggae legend.\\n3. **Relax at Seven Mile Beach**: Known for its beautiful white sand and clear blue waters, it’s perfect for sunbathing and swimming.\\n4. **Experience Negril Cliffs**: Enjoy breathtaking views and adventurous cliff diving.\\n5. **Discover Blue Hole**: A hidden gem near Ocho Rios, offering a refreshing swim in stunning turquoise waters.\\n\\nI will now find some hotel recommendations for you in Jamaica.\", 'name': 'sightseeing_advisor'}}}\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"{'hotel_advisor': {'messages': {'role': 'ai', 'content': 'For your stay in Jamaica, here are some hotel recommendations:\\n\\n1. **Sandals Montego Bay**: An all-inclusive resort offering luxury accommodations, private beaches, and various dining options.\\n\\n2. **Jamaica Inn**: Located in Ocho Rios, this boutique hotel offers a more intimate experience with stunning beach views and personalized service.\\n\\n3. **Half Moon Resort**: Situated in Montego Bay, this resort features a private beach, golf course, and a world-class spa.\\n\\n4. **The Caves Hotel**: In Negril, offering unique cliffside cottages and a romantic atmosphere.\\n\\n5. **Round Hill Hotel and Villas**: A classic resort near Montego Bay with luxurious villas and an elegant ambiance.\\n\\nEnjoy your trip to Jamaica, where warm weather and vibrant culture await!', 'name': 'hotel_advisor'}}}\n",
|
||||
"\n",
|
||||
"\n"
|
||||
]
|
||||
@@ -371,7 +410,7 @@
|
||||
" guard_on_duty: bool\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def villager(state: GameState) -> Command[Literal[\"villager\", END]]:\n",
|
||||
"def villager(state: GameState) -> Command[Literal[\"villager\", \"__end__\"]]:\n",
|
||||
" \"\"\"Villager NPC that gathers wood and food.\"\"\"\n",
|
||||
" current_resources = state[\"wood\"] + state[\"food\"]\n",
|
||||
" if current_resources < 15: # Continue gathering until we have enough resources\n",
|
||||
@@ -384,7 +423,7 @@
|
||||
" return Command(goto=END)\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def guard(state: GameState) -> Command[Literal[\"guard\", END]]:\n",
|
||||
"def guard(state: GameState) -> Command[Literal[\"guard\", \"__end__\"]]:\n",
|
||||
" \"\"\"Guard NPC that protects gold and consumes food.\"\"\"\n",
|
||||
" if not state[\"guard_on_duty\"]:\n",
|
||||
" return Command(goto=END)\n",
|
||||
@@ -401,7 +440,7 @@
|
||||
" return Command(goto=END, update={\"guard_on_duty\": False}) # Leave to get food\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def merchant(state: GameState) -> Command[Literal[\"merchant\", END]]:\n",
|
||||
"def merchant(state: GameState) -> Command[Literal[\"merchant\", \"__end__\"]]:\n",
|
||||
" \"\"\"Merchant NPC that trades wood for gold.\"\"\"\n",
|
||||
" if state[\"wood\"] >= 5: # Trade wood for gold when available\n",
|
||||
" print(\"Merchant trading wood for gold.\")\n",
|
||||
@@ -410,7 +449,7 @@
|
||||
" return Command(goto=END)\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def thief(state: GameState) -> Command[Literal[\"thief\", END]]:\n",
|
||||
"def thief(state: GameState) -> Command[Literal[\"thief\", \"__end__\"]]:\n",
|
||||
" \"\"\"Thief NPC that steals gold if the guard leaves to get food.\"\"\"\n",
|
||||
" if not state[\"guard_on_duty\"]:\n",
|
||||
" print(\"Thief stealing gold.\")\n",
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@@ -151,6 +151,7 @@
|
||||
"from langchain_core.runnables import RunnableConfig\n",
|
||||
"\n",
|
||||
"from langgraph.checkpoint.base import (\n",
|
||||
" WRITES_IDX_MAP,\n",
|
||||
" BaseCheckpointSaver,\n",
|
||||
" ChannelVersions,\n",
|
||||
" Checkpoint,\n",
|
||||
@@ -163,7 +164,7 @@
|
||||
"from redis import Redis\n",
|
||||
"from redis.asyncio import Redis as AsyncRedis\n",
|
||||
"\n",
|
||||
"REDIS_KEY_SEPARATOR = \":\"\n",
|
||||
"REDIS_KEY_SEPARATOR = \"$\"\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"# Utilities shared by both RedisSaver and AsyncRedisSaver\n",
|
||||
@@ -246,17 +247,6 @@
|
||||
" return keys\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def _dump_writes(serde: SerializerProtocol, writes: tuple[str, Any]) -> list[dict]:\n",
|
||||
" \"\"\"Serialize pending writes.\"\"\"\n",
|
||||
" serialized_writes = []\n",
|
||||
" for channel, value in writes:\n",
|
||||
" type_, serialized_value = serde.dumps_typed(value)\n",
|
||||
" serialized_writes.append(\n",
|
||||
" {\"channel\": channel, \"type\": type_, \"value\": serialized_value}\n",
|
||||
" )\n",
|
||||
" return serialized_writes\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def _load_writes(\n",
|
||||
" serde: SerializerProtocol, task_id_to_data: dict[tuple[str, str], dict]\n",
|
||||
") -> list[PendingWrite]:\n",
|
||||
@@ -413,7 +403,7 @@
|
||||
" config: RunnableConfig,\n",
|
||||
" writes: List[Tuple[str, Any]],\n",
|
||||
" task_id: str,\n",
|
||||
" ) -> RunnableConfig:\n",
|
||||
" ) -> None:\n",
|
||||
" \"\"\"Store intermediate writes linked to a checkpoint.\n",
|
||||
"\n",
|
||||
" Args:\n",
|
||||
@@ -425,12 +415,23 @@
|
||||
" checkpoint_ns = config[\"configurable\"][\"checkpoint_ns\"]\n",
|
||||
" checkpoint_id = config[\"configurable\"][\"checkpoint_id\"]\n",
|
||||
"\n",
|
||||
" for idx, data in enumerate(_dump_writes(self.serde, writes)):\n",
|
||||
" for idx, (channel, value) in enumerate(writes):\n",
|
||||
" key = _make_redis_checkpoint_writes_key(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id, task_id, idx\n",
|
||||
" thread_id,\n",
|
||||
" checkpoint_ns,\n",
|
||||
" checkpoint_id,\n",
|
||||
" task_id,\n",
|
||||
" WRITES_IDX_MAP.get(channel, idx),\n",
|
||||
" )\n",
|
||||
" self.conn.hset(key, mapping=data)\n",
|
||||
" return config\n",
|
||||
" type_, serialized_value = self.serde.dumps_typed(value)\n",
|
||||
" data = {\"channel\": channel, \"type\": type_, \"value\": serialized_value}\n",
|
||||
" if all(w[0] in WRITES_IDX_MAP for w in writes):\n",
|
||||
" # Use HSET which will overwrite existing values\n",
|
||||
" self.conn.hset(key, mapping=data)\n",
|
||||
" else:\n",
|
||||
" # Use HSETNX which will not overwrite existing values\n",
|
||||
" for field, value in data.items():\n",
|
||||
" self.conn.hsetnx(key, field, value)\n",
|
||||
"\n",
|
||||
" def get_tuple(self, config: RunnableConfig) -> Optional[CheckpointTuple]:\n",
|
||||
" \"\"\"Get a checkpoint tuple from Redis.\n",
|
||||
@@ -463,21 +464,8 @@
|
||||
" checkpoint_id\n",
|
||||
" or _parse_redis_checkpoint_key(checkpoint_key)[\"checkpoint_id\"]\n",
|
||||
" )\n",
|
||||
" writes_key = _make_redis_checkpoint_writes_key(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id, \"*\", None\n",
|
||||
" )\n",
|
||||
" matching_keys = self.conn.keys(pattern=writes_key)\n",
|
||||
" parsed_keys = [\n",
|
||||
" _parse_redis_checkpoint_writes_key(key.decode()) for key in matching_keys\n",
|
||||
" ]\n",
|
||||
" pending_writes = _load_writes(\n",
|
||||
" self.serde,\n",
|
||||
" {\n",
|
||||
" (parsed_key[\"task_id\"], parsed_key[\"idx\"]): self.conn.hgetall(key)\n",
|
||||
" for key, parsed_key in sorted(\n",
|
||||
" zip(matching_keys, parsed_keys), key=lambda x: x[1][\"idx\"]\n",
|
||||
" )\n",
|
||||
" },\n",
|
||||
" pending_writes = self._load_pending_writes(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id\n",
|
||||
" )\n",
|
||||
" return _parse_redis_checkpoint_data(\n",
|
||||
" self.serde, checkpoint_key, checkpoint_data, pending_writes=pending_writes\n",
|
||||
@@ -514,7 +502,37 @@
|
||||
" for key in keys:\n",
|
||||
" data = self.conn.hgetall(key)\n",
|
||||
" if data and b\"checkpoint\" in data and b\"metadata\" in data:\n",
|
||||
" yield _parse_redis_checkpoint_data(self.serde, key.decode(), data)\n",
|
||||
" # load pending writes\n",
|
||||
" checkpoint_id = _parse_redis_checkpoint_key(key.decode())[\n",
|
||||
" \"checkpoint_id\"\n",
|
||||
" ]\n",
|
||||
" pending_writes = self._load_pending_writes(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id\n",
|
||||
" )\n",
|
||||
" yield _parse_redis_checkpoint_data(\n",
|
||||
" self.serde, key.decode(), data, pending_writes=pending_writes\n",
|
||||
" )\n",
|
||||
"\n",
|
||||
" def _load_pending_writes(\n",
|
||||
" self, thread_id: str, checkpoint_ns: str, checkpoint_id: str\n",
|
||||
" ) -> List[PendingWrite]:\n",
|
||||
" writes_key = _make_redis_checkpoint_writes_key(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id, \"*\", None\n",
|
||||
" )\n",
|
||||
" matching_keys = self.conn.keys(pattern=writes_key)\n",
|
||||
" parsed_keys = [\n",
|
||||
" _parse_redis_checkpoint_writes_key(key.decode()) for key in matching_keys\n",
|
||||
" ]\n",
|
||||
" pending_writes = _load_writes(\n",
|
||||
" self.serde,\n",
|
||||
" {\n",
|
||||
" (parsed_key[\"task_id\"], parsed_key[\"idx\"]): self.conn.hgetall(key)\n",
|
||||
" for key, parsed_key in sorted(\n",
|
||||
" zip(matching_keys, parsed_keys), key=lambda x: x[1][\"idx\"]\n",
|
||||
" )\n",
|
||||
" },\n",
|
||||
" )\n",
|
||||
" return pending_writes\n",
|
||||
"\n",
|
||||
" def _get_checkpoint_key(\n",
|
||||
" self, conn, thread_id: str, checkpoint_ns: str, checkpoint_id: Optional[str]\n",
|
||||
@@ -637,7 +655,7 @@
|
||||
" config: RunnableConfig,\n",
|
||||
" writes: List[Tuple[str, Any]],\n",
|
||||
" task_id: str,\n",
|
||||
" ) -> RunnableConfig:\n",
|
||||
" ) -> None:\n",
|
||||
" \"\"\"Store intermediate writes linked to a checkpoint asynchronously.\n",
|
||||
"\n",
|
||||
" This method saves intermediate writes associated with a checkpoint to the database.\n",
|
||||
@@ -651,12 +669,23 @@
|
||||
" checkpoint_ns = config[\"configurable\"][\"checkpoint_ns\"]\n",
|
||||
" checkpoint_id = config[\"configurable\"][\"checkpoint_id\"]\n",
|
||||
"\n",
|
||||
" for idx, data in enumerate(_dump_writes(self.serde, writes)):\n",
|
||||
" for idx, (channel, value) in enumerate(writes):\n",
|
||||
" key = _make_redis_checkpoint_writes_key(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id, task_id, idx\n",
|
||||
" thread_id,\n",
|
||||
" checkpoint_ns,\n",
|
||||
" checkpoint_id,\n",
|
||||
" task_id,\n",
|
||||
" WRITES_IDX_MAP.get(channel, idx),\n",
|
||||
" )\n",
|
||||
" await self.conn.hset(key, mapping=data)\n",
|
||||
" return config\n",
|
||||
" type_, serialized_value = self.serde.dumps_typed(value)\n",
|
||||
" data = {\"channel\": channel, \"type\": type_, \"value\": serialized_value}\n",
|
||||
" if all(w[0] in WRITES_IDX_MAP for w in writes):\n",
|
||||
" # Use HSET which will overwrite existing values\n",
|
||||
" await self.conn.hset(key, mapping=data)\n",
|
||||
" else:\n",
|
||||
" # Use HSETNX which will not overwrite existing values\n",
|
||||
" for field, value in data.items():\n",
|
||||
" await self.conn.hsetnx(key, field, value)\n",
|
||||
"\n",
|
||||
" async def aget_tuple(self, config: RunnableConfig) -> Optional[CheckpointTuple]:\n",
|
||||
" \"\"\"Get a checkpoint tuple from Redis asynchronously.\n",
|
||||
@@ -688,21 +717,8 @@
|
||||
" checkpoint_id\n",
|
||||
" or _parse_redis_checkpoint_key(checkpoint_key)[\"checkpoint_id\"]\n",
|
||||
" )\n",
|
||||
" writes_key = _make_redis_checkpoint_writes_key(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id, \"*\", None\n",
|
||||
" )\n",
|
||||
" matching_keys = await self.conn.keys(pattern=writes_key)\n",
|
||||
" parsed_keys = [\n",
|
||||
" _parse_redis_checkpoint_writes_key(key.decode()) for key in matching_keys\n",
|
||||
" ]\n",
|
||||
" pending_writes = _load_writes(\n",
|
||||
" self.serde,\n",
|
||||
" {\n",
|
||||
" (parsed_key[\"task_id\"], parsed_key[\"idx\"]): await self.conn.hgetall(key)\n",
|
||||
" for key, parsed_key in sorted(\n",
|
||||
" zip(matching_keys, parsed_keys), key=lambda x: x[1][\"idx\"]\n",
|
||||
" )\n",
|
||||
" },\n",
|
||||
" pending_writes = await self._aload_pending_writes(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id\n",
|
||||
" )\n",
|
||||
" return _parse_redis_checkpoint_data(\n",
|
||||
" self.serde, checkpoint_key, checkpoint_data, pending_writes=pending_writes\n",
|
||||
@@ -738,7 +754,36 @@
|
||||
" for key in keys:\n",
|
||||
" data = await self.conn.hgetall(key)\n",
|
||||
" if data and b\"checkpoint\" in data and b\"metadata\" in data:\n",
|
||||
" yield _parse_redis_checkpoint_data(self.serde, key.decode(), data)\n",
|
||||
" checkpoint_id = _parse_redis_checkpoint_key(key.decode())[\n",
|
||||
" \"checkpoint_id\"\n",
|
||||
" ]\n",
|
||||
" pending_writes = await self._aload_pending_writes(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id\n",
|
||||
" )\n",
|
||||
" yield _parse_redis_checkpoint_data(\n",
|
||||
" self.serde, key.decode(), data, pending_writes=pending_writes\n",
|
||||
" )\n",
|
||||
"\n",
|
||||
" async def _aload_pending_writes(\n",
|
||||
" self, thread_id: str, checkpoint_ns: str, checkpoint_id: str\n",
|
||||
" ) -> List[PendingWrite]:\n",
|
||||
" writes_key = _make_redis_checkpoint_writes_key(\n",
|
||||
" thread_id, checkpoint_ns, checkpoint_id, \"*\", None\n",
|
||||
" )\n",
|
||||
" matching_keys = await self.conn.keys(pattern=writes_key)\n",
|
||||
" parsed_keys = [\n",
|
||||
" _parse_redis_checkpoint_writes_key(key.decode()) for key in matching_keys\n",
|
||||
" ]\n",
|
||||
" pending_writes = _load_writes(\n",
|
||||
" self.serde,\n",
|
||||
" {\n",
|
||||
" (parsed_key[\"task_id\"], parsed_key[\"idx\"]): await self.conn.hgetall(key)\n",
|
||||
" for key, parsed_key in sorted(\n",
|
||||
" zip(matching_keys, parsed_keys), key=lambda x: x[1][\"idx\"]\n",
|
||||
" )\n",
|
||||
" },\n",
|
||||
" )\n",
|
||||
" return pending_writes\n",
|
||||
"\n",
|
||||
" async def _aget_checkpoint_key(\n",
|
||||
" self, conn, thread_id: str, checkpoint_ns: str, checkpoint_id: Optional[str]\n",
|
||||
@@ -1042,7 +1087,7 @@
|
||||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.11.4"
|
||||
"version": "3.12.3"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
||||
@@ -0,0 +1,383 @@
|
||||
{
|
||||
"cells": [
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "7c58c957-83d8-44ff-8580-a9b3dd39a0a9",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# How to update graph state from tools"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {},
|
||||
"cell_type": "markdown",
|
||||
"id": "95f30587-8dd2-40be-920d-59539089c09f",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"!!! info \"Prerequisites\"\n",
|
||||
" This guide assumes familiarity with the following:\n",
|
||||
" \n",
|
||||
" - [Command](../../concepts/low_level/#command)\n",
|
||||
"\n",
|
||||
"A common use case is updating graph state from inside a tool. For example, in a customer support application you might want to look up customer account number or ID in the beginning of the conversation. To update the graph state from the tool, you can return `Command(update={\"my_custom_key\": \"foo\", \"messages\": [...]})` from the tool:\n",
|
||||
"\n",
|
||||
"```python\n",
|
||||
"@tool\n",
|
||||
"def lookup_user_info(tool_call_id: Annotated[str, InjectedToolCallId], config: RunnableConfig):\n",
|
||||
" \"\"\"Use this to look up user information to better assist them with their questions.\"\"\"\n",
|
||||
" user_info = get_user_info(config)\n",
|
||||
" return Command(\n",
|
||||
" update={\n",
|
||||
" # update the state keys\n",
|
||||
" \"user_info\": user_info,\n",
|
||||
" # update the message history\n",
|
||||
" \"messages\": [ToolMessage(\"Successfully looked up user information\", tool_call_id=tool_call_id)]\n",
|
||||
" }\n",
|
||||
" )\n",
|
||||
"```\n",
|
||||
"\n",
|
||||
"!!! important\n",
|
||||
"\n",
|
||||
" If you want to use tools that return `Command` and update graph state, you can either use prebuilt [`create_react_agent`][langgraph.prebuilt.chat_agent_executor.create_react_agent] / [`ToolNode`][langgraph.prebuilt.tool_node.ToolNode] components, or implement your own tool-executing node that collects `Command` objects returned by the tools and returns a list of them, e.g.:\n",
|
||||
" \n",
|
||||
" ```python\n",
|
||||
" def call_tools(state):\n",
|
||||
" ...\n",
|
||||
" commands = [tools_by_name[tool_call[\"name\"]].invoke(tool_call) for tool_call in tool_calls]\n",
|
||||
" return commands\n",
|
||||
" ```\n",
|
||||
"\n",
|
||||
"This guide shows how you can do this using LangGraph's prebuilt components ([`create_react_agent`][langgraph.prebuilt.chat_agent_executor.create_react_agent] / [`ToolNode`][langgraph.prebuilt.tool_node.ToolNode]).\n",
|
||||
"\n",
|
||||
"!!! note\n",
|
||||
"\n",
|
||||
" Support for tools that return [`Command`][langgraph.types.Command] was added in LangGraph `v0.2.59`.\n",
|
||||
"\n",
|
||||
"## Setup\n",
|
||||
"\n",
|
||||
"First, let's install the required packages and set our API keys:"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 1,
|
||||
"id": "64500eca-1cdc-43d9-9401-f4cd9999881f",
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"%%capture --no-stderr\n",
|
||||
"%pip install -U langgraph langchain-openai"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 2,
|
||||
"id": "a3f92fb2-9175-47fa-9c7d-ad5f44bfd20e",
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"name": "stdout",
|
||||
"output_type": "stream",
|
||||
"text": [
|
||||
"Please provide your OPENAI_API_KEY ········\n"
|
||||
]
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"import os\n",
|
||||
"import getpass\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def _set_if_undefined(var: str):\n",
|
||||
" if not os.environ.get(var):\n",
|
||||
" os.environ[var] = getpass.getpass(f\"Please provide your {var}\")\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"_set_if_undefined(\"OPENAI_API_KEY\")"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "caf6ff9f-c1e6-499e-a230-9fa231ea7d2f",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"<div class=\"admonition tip\">\n",
|
||||
" <p class=\"admonition-title\">Set up <a href=\"https://smith.langchain.com\">LangSmith</a> for LangGraph development</p>\n",
|
||||
" <p style=\"padding-top: 5px;\">\n",
|
||||
" Sign up for LangSmith to quickly spot issues and improve the performance of your LangGraph projects. LangSmith lets you use trace data to debug, test, and monitor your LLM apps built with LangGraph — read more about how to get started <a href=\"https://docs.smith.langchain.com\">here</a>. \n",
|
||||
" </p>\n",
|
||||
"</div>"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "10e9a9c6-fa3f-416c-bac0-3e58d7259908",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Let's create a simple ReAct style agent that can look up user information and personalize the response based on the user info."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "4255b9b9-cf67-4cc3-8018-1708f5dfcfd2",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## Define tool"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "7de6b010-aab1-4fe8-8251-907fcae78583",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"First, let's define the tool that we'll be using to look up user information. We'll use a naive implementation that simply looks user information up using a dictionary:"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": null,
|
||||
"id": "8d070c9f-6e61-4724-85dc-ac4531b9c79a",
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"USER_INFO = [\n",
|
||||
" {\"user_id\": \"1\", \"name\": \"Bob Dylan\", \"location\": \"New York, NY\"},\n",
|
||||
" {\"user_id\": \"2\", \"name\": \"Taylor Swift\", \"location\": \"Beverly Hills, CA\"},\n",
|
||||
"]\n",
|
||||
"\n",
|
||||
"USER_ID_TO_USER_INFO = {info[\"user_id\"]: info for info in USER_INFO}"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 3,
|
||||
"id": "08d1ecca-ee57-4e97-b8d0-e09de85337d4",
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"from langgraph.prebuilt.chat_agent_executor import AgentState\n",
|
||||
"from langgraph.types import Command\n",
|
||||
"from langchain_core.tools import tool\n",
|
||||
"from langchain_core.tools.base import InjectedToolCallId\n",
|
||||
"from langchain_core.messages import ToolMessage\n",
|
||||
"from langchain_core.runnables import RunnableConfig\n",
|
||||
"\n",
|
||||
"from typing_extensions import Any, Annotated\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"class State(AgentState):\n",
|
||||
" # user provided\n",
|
||||
" last_name: str\n",
|
||||
" # updated by the tool\n",
|
||||
" user_info: dict[str, Any]\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"@tool\n",
|
||||
"def lookup_user_info(\n",
|
||||
" tool_call_id: Annotated[str, InjectedToolCallId], config: RunnableConfig\n",
|
||||
"):\n",
|
||||
" \"\"\"Use this to look up user information to better assist them with their questions.\"\"\"\n",
|
||||
" user_id = config.get(\"configurable\", {}).get(\"user_id\")\n",
|
||||
" if user_id is None:\n",
|
||||
" raise ValueError(\"Please provide user ID\")\n",
|
||||
"\n",
|
||||
" if user_id not in USER_ID_TO_USER_INFO:\n",
|
||||
" raise ValueError(f\"User '{user_id}' not found\")\n",
|
||||
"\n",
|
||||
" user_info = USER_ID_TO_USER_INFO[user_id]\n",
|
||||
" return Command(\n",
|
||||
" update={\n",
|
||||
" # update the state keys\n",
|
||||
" \"user_info\": user_info,\n",
|
||||
" # update the message history\n",
|
||||
" \"messages\": [\n",
|
||||
" ToolMessage(\n",
|
||||
" \"Successfully looked up user information\", tool_call_id=tool_call_id\n",
|
||||
" )\n",
|
||||
" ],\n",
|
||||
" }\n",
|
||||
" )"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "b99e5f24-5e5e-4a34-baae-467182675bb5",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## Define prompt"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "cbb06aea-6654-4245-91f8-af6e8f2b5377",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Let's now add personalization: we'll respond differently to the user based on the state values AFTER the state has been updated from the tool. To achieve this, let's define a function that will dynamically construct the system prompt based on the graph state. It will be called ever time the LLM is called and the function output will be passed to the LLM:"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 4,
|
||||
"id": "c553d062-d145-4145-84bd-9b798f7c95c2",
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"def state_modifier(state: State):\n",
|
||||
" user_info = state.get(\"user_info\")\n",
|
||||
" if user_info is None:\n",
|
||||
" return state[\"messages\"]\n",
|
||||
"\n",
|
||||
" system_msg = (\n",
|
||||
" f\"User name is {user_info['name']}. User lives in {user_info['location']}\"\n",
|
||||
" )\n",
|
||||
" return [{\"role\": \"system\", \"content\": system_msg}] + state[\"messages\"]"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "c5acdd5d-68be-466b-9c21-46cbed91d2bc",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## Define graph"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "afb65028-0359-46c8-b09c-ffc90180f759",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Finally, let's combine this into a single graph using the prebuilt `create_react_agent`:"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 5,
|
||||
"id": "2d59db29-fd51-4d29-9854-21763a4855e3",
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"from langgraph.prebuilt import create_react_agent\n",
|
||||
"from langchain_openai import ChatOpenAI\n",
|
||||
"\n",
|
||||
"model = ChatOpenAI(model=\"gpt-4o\")\n",
|
||||
"\n",
|
||||
"agent = create_react_agent(\n",
|
||||
" model,\n",
|
||||
" # pass the tool that can update state\n",
|
||||
" [lookup_user_info],\n",
|
||||
" state_schema=State,\n",
|
||||
" # pass dynamic prompt function\n",
|
||||
" state_modifier=state_modifier,\n",
|
||||
")"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "0782b8ab-a603-47b8-9a76-77f593402678",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## Use it!"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "6165e153-ab28-4404-adea-796c7bd0701b",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Let's now try running our agent. We'll need to provide user ID in the config so that our tool knows what information to look up:"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 6,
|
||||
"id": "de34a58b-1765-4b63-a232-d46790aff884",
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"name": "stdout",
|
||||
"output_type": "stream",
|
||||
"text": [
|
||||
"{'agent': {'messages': [AIMessage(content='', additional_kwargs={'tool_calls': [{'id': 'call_7LSUh6ZDvGJAUvlWvXiCK4Gf', 'function': {'arguments': '{}', 'name': 'lookup_user_info'}, 'type': 'function'}], 'refusal': None}, response_metadata={'token_usage': {'completion_tokens': 11, 'prompt_tokens': 56, 'total_tokens': 67, 'completion_tokens_details': {'accepted_prediction_tokens': 0, 'audio_tokens': 0, 'reasoning_tokens': 0, 'rejected_prediction_tokens': 0}, 'prompt_tokens_details': {'audio_tokens': 0, 'cached_tokens': 0}}, 'model_name': 'gpt-4o-2024-08-06', 'system_fingerprint': 'fp_9d50cd990b', 'finish_reason': 'tool_calls', 'logprobs': None}, id='run-57eeb216-e35d-4501-aaac-b5c6b26fb17c-0', tool_calls=[{'name': 'lookup_user_info', 'args': {}, 'id': 'call_7LSUh6ZDvGJAUvlWvXiCK4Gf', 'type': 'tool_call'}], usage_metadata={'input_tokens': 56, 'output_tokens': 11, 'total_tokens': 67, 'input_token_details': {'audio': 0, 'cache_read': 0}, 'output_token_details': {'audio': 0, 'reasoning': 0}})]}}\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"{'tools': {'user_info': {'user_id': '1', 'name': 'Bob Dylan', 'location': 'New York, NY'}, 'messages': [ToolMessage(content='Successfully looked up user information', name='lookup_user_info', id='168d8ff8-b021-4c8b-a11a-3b50c30a072c', tool_call_id='call_7LSUh6ZDvGJAUvlWvXiCK4Gf')]}}\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"{'agent': {'messages': [AIMessage(content=\"Hi Bob! Since you're in New York, NY, there are plenty of exciting things to do over the weekend. Here are some suggestions:\\n\\n1. **Explore Central Park**: Take a leisurely walk, rent a bike, or have a picnic in this iconic park.\\n\\n2. **Visit a Museum**: Check out The Metropolitan Museum of Art or the Museum of Modern Art (MoMA) for an enriching cultural experience.\\n\\n3. **Broadway Show**: Catch a Broadway show or an off-Broadway performance for some world-class entertainment.\\n\\n4. **Food Tour**: Explore different neighborhoods like Greenwich Village or Williamsburg for diverse culinary experiences.\\n\\n5. **Brooklyn Bridge Walk**: Take a walk across the Brooklyn Bridge for stunning views of the city skyline.\\n\\n6. **Visit a Rooftop Bar**: Enjoy a drink with a view at one of New York’s many rooftop bars.\\n\\n7. **Explore a New Neighborhood**: Discover the unique charm of areas like SoHo, Chelsea, or Astoria.\\n\\n8. **Live Music**: Check out live music venues for a night of great performances.\\n\\n9. **Art Galleries**: Visit some of the smaller art galleries around Chelsea or the Lower East Side.\\n\\n10. **Attend a Local Event**: Look up any local events or festivals happening this weekend.\\n\\nFeel free to let me know if you want more details on any of these activities!\", additional_kwargs={'refusal': None}, response_metadata={'token_usage': {'completion_tokens': 285, 'prompt_tokens': 95, 'total_tokens': 380, 'completion_tokens_details': {'accepted_prediction_tokens': 0, 'audio_tokens': 0, 'reasoning_tokens': 0, 'rejected_prediction_tokens': 0}, 'prompt_tokens_details': {'audio_tokens': 0, 'cached_tokens': 0}}, 'model_name': 'gpt-4o-2024-08-06', 'system_fingerprint': 'fp_9d50cd990b', 'finish_reason': 'stop', 'logprobs': None}, id='run-f13ce15b-02b6-40e6-8264-c4d9edd0d03a-0', usage_metadata={'input_tokens': 95, 'output_tokens': 285, 'total_tokens': 380, 'input_token_details': {'audio': 0, 'cache_read': 0}, 'output_token_details': {'audio': 0, 'reasoning': 0}})]}}\n",
|
||||
"\n",
|
||||
"\n"
|
||||
]
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"for chunk in agent.stream(\n",
|
||||
" {\"messages\": [(\"user\", \"hi, what should i do this weekend?\")]},\n",
|
||||
" # provide user ID in the config\n",
|
||||
" {\"configurable\": {\"user_id\": \"1\"}},\n",
|
||||
"):\n",
|
||||
" print(chunk)\n",
|
||||
" print(\"\\n\")"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"id": "d9b2281f-269c-41dd-b6b2-4c743f11ffc9",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"We can see that the model correctly recommended some New York activities for Bob Dylan! Let's try getting recommendations for Taylor Swift:"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 7,
|
||||
"id": "9d71af94-572a-4961-88a7-665e792cf96a",
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"name": "stdout",
|
||||
"output_type": "stream",
|
||||
"text": [
|
||||
"{'agent': {'messages': [AIMessage(content='', additional_kwargs={'tool_calls': [{'id': 'call_5HLtJtzcgmKbtmK6By21wW5Y', 'function': {'arguments': '{}', 'name': 'lookup_user_info'}, 'type': 'function'}], 'refusal': None}, response_metadata={'token_usage': {'completion_tokens': 11, 'prompt_tokens': 56, 'total_tokens': 67, 'completion_tokens_details': {'accepted_prediction_tokens': 0, 'audio_tokens': 0, 'reasoning_tokens': 0, 'rejected_prediction_tokens': 0}, 'prompt_tokens_details': {'audio_tokens': 0, 'cached_tokens': 0}}, 'model_name': 'gpt-4o-2024-08-06', 'system_fingerprint': 'fp_c7ca0ebaca', 'finish_reason': 'tool_calls', 'logprobs': None}, id='run-bacacd7d-76cc-4f6b-9e9b-d9e6f00b9391-0', tool_calls=[{'name': 'lookup_user_info', 'args': {}, 'id': 'call_5HLtJtzcgmKbtmK6By21wW5Y', 'type': 'tool_call'}], usage_metadata={'input_tokens': 56, 'output_tokens': 11, 'total_tokens': 67, 'input_token_details': {'audio': 0, 'cache_read': 0}, 'output_token_details': {'audio': 0, 'reasoning': 0}})]}}\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"{'tools': {'user_info': {'user_id': '2', 'name': 'Taylor Swift', 'location': 'Beverly Hills, CA'}, 'messages': [ToolMessage(content='Successfully looked up user information', name='lookup_user_info', id='d81ef31e-6d77-4f13-ae86-e2e6ba567e3d', tool_call_id='call_5HLtJtzcgmKbtmK6By21wW5Y')]}}\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"{'agent': {'messages': [AIMessage(content=\"Hi Taylor! Since you're in Beverly Hills, here are a few suggestions for a fun weekend:\\n\\n1. **Hiking at Runyon Canyon**: Enjoy a scenic hike with beautiful views of Los Angeles. It's a great way to get some exercise and enjoy the outdoors.\\n\\n2. **Visit Rodeo Drive**: Spend some time shopping or window shopping at the famous Rodeo Drive. You might even spot some celebrities!\\n\\n3. **Explore the Getty Center**: Check out the art collections and beautiful gardens at the Getty Center. The architecture and views are stunning.\\n\\n4. **Relax at a Spa**: Treat yourself to a relaxing day at one of Beverly Hills' luxurious spas.\\n\\n5. **Dining Out**: Try a new restaurant or visit your favorite spot for a delicious meal. Beverly Hills has a fantastic dining scene.\\n\\n6. **Attend a Local Event**: Check out any local events or concerts happening this weekend. Beverly Hills often hosts exciting events.\\n\\nEnjoy your weekend!\", additional_kwargs={'refusal': None}, response_metadata={'token_usage': {'completion_tokens': 198, 'prompt_tokens': 95, 'total_tokens': 293, 'completion_tokens_details': {'accepted_prediction_tokens': 0, 'audio_tokens': 0, 'reasoning_tokens': 0, 'rejected_prediction_tokens': 0}, 'prompt_tokens_details': {'audio_tokens': 0, 'cached_tokens': 0}}, 'model_name': 'gpt-4o-2024-08-06', 'system_fingerprint': 'fp_c7ca0ebaca', 'finish_reason': 'stop', 'logprobs': None}, id='run-2057df76-f192-4c69-a66a-1f0a86bf5d66-0', usage_metadata={'input_tokens': 95, 'output_tokens': 198, 'total_tokens': 293, 'input_token_details': {'audio': 0, 'cache_read': 0}, 'output_token_details': {'audio': 0, 'reasoning': 0}})]}}\n",
|
||||
"\n",
|
||||
"\n"
|
||||
]
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"for chunk in agent.stream(\n",
|
||||
" {\"messages\": [(\"user\", \"hi, what should i do this weekend?\")]},\n",
|
||||
" {\"configurable\": {\"user_id\": \"2\"}},\n",
|
||||
"):\n",
|
||||
" print(chunk)\n",
|
||||
" print(\"\\n\")"
|
||||
]
|
||||
}
|
||||
],
|
||||
"metadata": {
|
||||
"kernelspec": {
|
||||
"display_name": "Python 3 (ipykernel)",
|
||||
"language": "python",
|
||||
"name": "python3"
|
||||
},
|
||||
"language_info": {
|
||||
"codemirror_mode": {
|
||||
"name": "ipython",
|
||||
"version": 3
|
||||
},
|
||||
"file_extension": ".py",
|
||||
"mimetype": "text/x-python",
|
||||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.12.3"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
"nbformat_minor": 5
|
||||
}
|
||||
@@ -192,6 +192,7 @@ nav:
|
||||
- how-tos/tool-calling.ipynb
|
||||
- how-tos/tool-calling-errors.ipynb
|
||||
- how-tos/pass-run-time-values-to-tools.ipynb
|
||||
- how-tos/update-state-from-tools.ipynb
|
||||
- how-tos/pass-config-to-tools.ipynb
|
||||
- how-tos/many-tools.ipynb
|
||||
- Subgraphs:
|
||||
|
||||
@@ -99,6 +99,13 @@ class AsyncPostgresStore(AsyncBatchedBaseStore, BasePostgresStore[_ainternal.Con
|
||||
2. Have the pgvector extension available to use vector search
|
||||
3. Use Python 3.10+ for async functionality
|
||||
|
||||
Tip:
|
||||
This class is available in the [`langgraph-checkpoint-postgres` package](https://pypi.org/project/langgraph-checkpoint-postgres/).
|
||||
Install with:
|
||||
```bash
|
||||
pip install langgraph-checkpoint-postgres
|
||||
```
|
||||
|
||||
Note:
|
||||
Semantic search is disabled by default. You can enable it by providing an `index` configuration
|
||||
when creating the store. Without this configuration, all `index` arguments passed to
|
||||
|
||||
@@ -578,6 +578,13 @@ class PostgresStore(BaseStore, BasePostgresStore[_pg_internal.Conn]):
|
||||
Semantic search is disabled by default. You can enable it by providing an `index` configuration
|
||||
when creating the store. Without this configuration, all `index` arguments passed to
|
||||
`put` or `aput`will have no effect.
|
||||
|
||||
Tip:
|
||||
This class is available in the [`langgraph-checkpoint-postgres` package](https://pypi.org/project/langgraph-checkpoint-postgres/).
|
||||
Install with:
|
||||
```bash
|
||||
pip install langgraph-checkpoint-postgres
|
||||
```
|
||||
|
||||
Warning:
|
||||
Make sure to call `setup()` before first use to create necessary tables and indexes.
|
||||
|
||||
@@ -1,4 +1,3 @@
|
||||
import asyncio
|
||||
import logging
|
||||
import os
|
||||
import pickle
|
||||
@@ -6,7 +5,6 @@ import random
|
||||
import shutil
|
||||
from collections import defaultdict
|
||||
from contextlib import AbstractAsyncContextManager, AbstractContextManager, ExitStack
|
||||
from functools import partial
|
||||
from types import TracebackType
|
||||
from typing import Any, AsyncIterator, Dict, Iterator, Optional, Sequence, Tuple, Type
|
||||
|
||||
@@ -395,9 +393,7 @@ class MemorySaver(
|
||||
Returns:
|
||||
Optional[CheckpointTuple]: The retrieved checkpoint tuple, or None if no matching checkpoint was found.
|
||||
"""
|
||||
return await asyncio.get_running_loop().run_in_executor(
|
||||
None, self.get_tuple, config
|
||||
)
|
||||
return self.get_tuple(config)
|
||||
|
||||
async def alist(
|
||||
self,
|
||||
@@ -418,24 +414,8 @@ class MemorySaver(
|
||||
Yields:
|
||||
AsyncIterator[CheckpointTuple]: An asynchronous iterator of checkpoint tuples.
|
||||
"""
|
||||
loop = asyncio.get_running_loop()
|
||||
iter = await loop.run_in_executor(
|
||||
None,
|
||||
partial(
|
||||
self.list,
|
||||
before=before,
|
||||
limit=limit,
|
||||
filter=filter,
|
||||
),
|
||||
config,
|
||||
)
|
||||
while True:
|
||||
# handling StopIteration exception inside coroutine won't work
|
||||
# as expected, so using next() with default value to break the loop
|
||||
if item := await loop.run_in_executor(None, next, iter, None):
|
||||
yield item
|
||||
else:
|
||||
break
|
||||
for item in self.list(config, filter=filter, before=before, limit=limit):
|
||||
yield item
|
||||
|
||||
async def aput(
|
||||
self,
|
||||
@@ -455,9 +435,7 @@ class MemorySaver(
|
||||
Returns:
|
||||
RunnableConfig: The updated config containing the saved checkpoint's timestamp.
|
||||
"""
|
||||
return await asyncio.get_running_loop().run_in_executor(
|
||||
None, self.put, config, checkpoint, metadata, new_versions
|
||||
)
|
||||
return self.put(config, checkpoint, metadata, new_versions)
|
||||
|
||||
async def aput_writes(
|
||||
self,
|
||||
@@ -474,10 +452,9 @@ class MemorySaver(
|
||||
config (RunnableConfig): The config to associate with the writes.
|
||||
writes (List[Tuple[str, Any]]): The writes to save, each as a (channel, value) pair.
|
||||
task_id (str): Identifier for the task creating the writes.
|
||||
return self.put_writes(config, writes, task_id)
|
||||
"""
|
||||
return await asyncio.get_running_loop().run_in_executor(
|
||||
None, self.put_writes, config, writes, task_id
|
||||
)
|
||||
return self.put_writes(config, writes, task_id)
|
||||
|
||||
def get_next_version(self, current: Optional[str], channel: ChannelProtocol) -> str:
|
||||
if current is None:
|
||||
|
||||
@@ -438,28 +438,36 @@ def _msgpack_default(obj: Any) -> Union[str, msgpack.ExtType]:
|
||||
def _msgpack_ext_hook(code: int, data: bytes) -> Any:
|
||||
if code == EXT_CONSTRUCTOR_SINGLE_ARG:
|
||||
try:
|
||||
tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
|
||||
tup = msgpack.unpackb(
|
||||
data, ext_hook=_msgpack_ext_hook, strict_map_key=False
|
||||
)
|
||||
# module, name, arg
|
||||
return getattr(importlib.import_module(tup[0]), tup[1])(tup[2])
|
||||
except Exception:
|
||||
return
|
||||
elif code == EXT_CONSTRUCTOR_POS_ARGS:
|
||||
try:
|
||||
tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
|
||||
tup = msgpack.unpackb(
|
||||
data, ext_hook=_msgpack_ext_hook, strict_map_key=False
|
||||
)
|
||||
# module, name, args
|
||||
return getattr(importlib.import_module(tup[0]), tup[1])(*tup[2])
|
||||
except Exception:
|
||||
return
|
||||
elif code == EXT_CONSTRUCTOR_KW_ARGS:
|
||||
try:
|
||||
tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
|
||||
tup = msgpack.unpackb(
|
||||
data, ext_hook=_msgpack_ext_hook, strict_map_key=False
|
||||
)
|
||||
# module, name, args
|
||||
return getattr(importlib.import_module(tup[0]), tup[1])(**tup[2])
|
||||
except Exception:
|
||||
return
|
||||
elif code == EXT_METHOD_SINGLE_ARG:
|
||||
try:
|
||||
tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
|
||||
tup = msgpack.unpackb(
|
||||
data, ext_hook=_msgpack_ext_hook, strict_map_key=False
|
||||
)
|
||||
# module, name, arg, method
|
||||
return getattr(getattr(importlib.import_module(tup[0]), tup[1]), tup[3])(
|
||||
tup[2]
|
||||
@@ -468,7 +476,9 @@ def _msgpack_ext_hook(code: int, data: bytes) -> Any:
|
||||
return
|
||||
elif code == EXT_PYDANTIC_V1:
|
||||
try:
|
||||
tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
|
||||
tup = msgpack.unpackb(
|
||||
data, ext_hook=_msgpack_ext_hook, strict_map_key=False
|
||||
)
|
||||
# module, name, kwargs
|
||||
cls = getattr(importlib.import_module(tup[0]), tup[1])
|
||||
try:
|
||||
@@ -479,7 +489,9 @@ def _msgpack_ext_hook(code: int, data: bytes) -> Any:
|
||||
return
|
||||
elif code == EXT_PYDANTIC_V2:
|
||||
try:
|
||||
tup = msgpack.unpackb(data, ext_hook=_msgpack_ext_hook)
|
||||
tup = msgpack.unpackb(
|
||||
data, ext_hook=_msgpack_ext_hook, strict_map_key=False
|
||||
)
|
||||
# module, name, kwargs, method
|
||||
cls = getattr(importlib.import_module(tup[0]), tup[1])
|
||||
try:
|
||||
|
||||
@@ -611,6 +611,11 @@ class BaseStore(ABC):
|
||||
by providing an `index` configuration at creation time. Without this
|
||||
configuration, semantic search is disabled and any `index` arguments
|
||||
to storage operations will have no effect.
|
||||
|
||||
Note:
|
||||
When deploying to the LangGraph Platform, your store (and checkpointer)
|
||||
are managed by the platform. Do not manually create a store, as it will
|
||||
be ignored.
|
||||
"""
|
||||
|
||||
__slots__ = ("__weakref__",)
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
[tool.poetry]
|
||||
name = "langgraph-checkpoint"
|
||||
version = "2.0.8"
|
||||
version = "2.0.9"
|
||||
description = "Library with base interfaces for LangGraph checkpoint savers."
|
||||
authors = []
|
||||
license = "MIT"
|
||||
|
||||
@@ -559,6 +559,7 @@ class StateGraph(Graph):
|
||||
for key, node in self.nodes.items():
|
||||
compiled.attach_node(key, node)
|
||||
|
||||
compiled.attach_branch(START, SELF, CONTROL_BRANCH, with_reader=False)
|
||||
for key, node in self.nodes.items():
|
||||
compiled.attach_branch(key, SELF, CONTROL_BRANCH, with_reader=False)
|
||||
|
||||
|
||||
@@ -297,7 +297,7 @@ class ToolNode(RunnableCallable):
|
||||
|
||||
try:
|
||||
input = {**call, **{"type": "tool_call"}}
|
||||
response = self.tools_by_name[call["name"]].invoke(input)
|
||||
response = self.tools_by_name[call["name"]].invoke(input, config)
|
||||
|
||||
# GraphInterrupt is a special exception that will always be raised.
|
||||
# It can be triggered in the following scenarios:
|
||||
@@ -352,7 +352,7 @@ class ToolNode(RunnableCallable):
|
||||
|
||||
try:
|
||||
input = {**call, **{"type": "tool_call"}}
|
||||
response = await self.tools_by_name[call["name"]].ainvoke(input)
|
||||
response = await self.tools_by_name[call["name"]].ainvoke(input, config)
|
||||
|
||||
# GraphInterrupt is a special exception that will always be raised.
|
||||
# It can be triggered in the following scenarios:
|
||||
|
||||
@@ -18,7 +18,6 @@ from typing import (
|
||||
Type,
|
||||
Union,
|
||||
cast,
|
||||
get_type_hints,
|
||||
overload,
|
||||
)
|
||||
from uuid import UUID, uuid5
|
||||
@@ -117,6 +116,7 @@ from langgraph.utils.config import (
|
||||
patch_config,
|
||||
patch_configurable,
|
||||
)
|
||||
from langgraph.utils.fields import get_enhanced_type_hints
|
||||
from langgraph.utils.pydantic import create_model
|
||||
from langgraph.utils.queue import AsyncQueue, SyncQueue # type: ignore[attr-defined]
|
||||
|
||||
@@ -319,8 +319,15 @@ class Pregel(PregelProtocol):
|
||||
)
|
||||
+ (
|
||||
[
|
||||
ConfigurableFieldSpec(id=name, annotation=typ)
|
||||
for name, typ in get_type_hints(self.config_type).items()
|
||||
ConfigurableFieldSpec(
|
||||
id=name,
|
||||
annotation=typ,
|
||||
default=default,
|
||||
description=description,
|
||||
)
|
||||
for name, typ, default, description in get_enhanced_type_hints(
|
||||
self.config_type
|
||||
)
|
||||
]
|
||||
if self.config_type is not None
|
||||
else []
|
||||
|
||||
@@ -14,6 +14,8 @@ from langgraph.constants import (
|
||||
PUSH,
|
||||
RESUME,
|
||||
RETURN,
|
||||
SELF,
|
||||
START,
|
||||
TAG_HIDDEN,
|
||||
TASKS,
|
||||
)
|
||||
@@ -79,12 +81,14 @@ def map_command(
|
||||
else:
|
||||
sends = [cmd.goto]
|
||||
for send in sends:
|
||||
if not isinstance(send, Send):
|
||||
if isinstance(send, Send):
|
||||
yield (NULL_TASK_ID, PUSH if FF_SEND_V2 else TASKS, send)
|
||||
elif isinstance(send, str):
|
||||
yield (NULL_TASK_ID, f"branch:{START}:{SELF}:{send}", START)
|
||||
else:
|
||||
raise TypeError(
|
||||
f"In Command.goto, expected Send, got {type(send).__name__}"
|
||||
f"In Command.goto, expected Send/str, got {type(send).__name__}"
|
||||
)
|
||||
yield (NULL_TASK_ID, PUSH if FF_SEND_V2 else TASKS, send)
|
||||
# TODO handle goto str for state graph
|
||||
if cmd.resume:
|
||||
if isinstance(cmd.resume, dict) and all(is_task_id(k) for k in cmd.resume):
|
||||
for tid, resume in cmd.resume.items():
|
||||
|
||||
@@ -311,7 +311,9 @@ class PregelLoop(LoopProtocol):
|
||||
) -> Optional[PregelExecutableTask]:
|
||||
"""Accept a PUSH from a task, potentially returning a new task to start."""
|
||||
# don't start if we should interrupt *after* the original task
|
||||
if should_interrupt(self.checkpoint, self.interrupt_after, [task]):
|
||||
if self.interrupt_after and should_interrupt(
|
||||
self.checkpoint, self.interrupt_after, [task]
|
||||
):
|
||||
self.to_interrupt.append(task)
|
||||
return
|
||||
if pushed := cast(
|
||||
@@ -333,7 +335,9 @@ class PregelLoop(LoopProtocol):
|
||||
),
|
||||
):
|
||||
# don't start if we should interrupt *before* the new task
|
||||
if should_interrupt(self.checkpoint, self.interrupt_before, [pushed]):
|
||||
if self.interrupt_before and should_interrupt(
|
||||
self.checkpoint, self.interrupt_before, [pushed]
|
||||
):
|
||||
self.to_interrupt.append(pushed)
|
||||
return
|
||||
# produce debug output
|
||||
@@ -409,7 +413,7 @@ class PregelLoop(LoopProtocol):
|
||||
}
|
||||
)
|
||||
# after execution, check if we should interrupt
|
||||
if should_interrupt(
|
||||
if self.interrupt_after and should_interrupt(
|
||||
self.checkpoint, self.interrupt_after, self.tasks.values()
|
||||
):
|
||||
self.status = "interrupt_after"
|
||||
@@ -422,18 +426,6 @@ class PregelLoop(LoopProtocol):
|
||||
self.status = "out_of_steps"
|
||||
return False
|
||||
|
||||
# apply NULL writes
|
||||
if null_writes := [
|
||||
w[1:] for w in self.checkpoint_pending_writes if w[0] == NULL_TASK_ID
|
||||
]:
|
||||
mv_writes = apply_writes(
|
||||
self.checkpoint,
|
||||
self.channels,
|
||||
[PregelTaskWrites((), INPUT, null_writes, [])],
|
||||
self.checkpointer_get_next_version,
|
||||
)
|
||||
for key, values in mv_writes.items():
|
||||
self._update_mv(key, values)
|
||||
# prepare next tasks
|
||||
self.tasks = prepare_next_tasks(
|
||||
self.checkpoint,
|
||||
@@ -493,7 +485,7 @@ class PregelLoop(LoopProtocol):
|
||||
return self.tick(input_keys=input_keys)
|
||||
|
||||
# before execution, check if we should interrupt
|
||||
if should_interrupt(
|
||||
if self.interrupt_before and should_interrupt(
|
||||
self.checkpoint, self.interrupt_before, self.tasks.values()
|
||||
):
|
||||
self.status = "interrupt_before"
|
||||
@@ -552,6 +544,18 @@ class PregelLoop(LoopProtocol):
|
||||
# save writes
|
||||
for tid, ws in writes.items():
|
||||
self.put_writes(tid, ws)
|
||||
# apply NULL writes
|
||||
if null_writes := [
|
||||
w[1:] for w in self.checkpoint_pending_writes if w[0] == NULL_TASK_ID
|
||||
]:
|
||||
mv_writes = apply_writes(
|
||||
self.checkpoint,
|
||||
self.channels,
|
||||
[PregelTaskWrites((), INPUT, null_writes, [])],
|
||||
self.checkpointer_get_next_version,
|
||||
)
|
||||
for key, values in mv_writes.items():
|
||||
self._update_mv(key, values)
|
||||
# proceed past previous checkpoint
|
||||
if is_resuming:
|
||||
self.checkpoint["versions_seen"].setdefault(INTERRUPT, {})
|
||||
|
||||
@@ -347,6 +347,99 @@ class PregelScratchpad(TypedDict, total=False):
|
||||
|
||||
|
||||
def interrupt(value: Any) -> Any:
|
||||
"""Interrupt the graph with a resumable exception from within a node.
|
||||
|
||||
The `interrupt` function enables human-in-the-loop workflows by pausing graph
|
||||
execution and surfacing a value to the client. This value can communicate context
|
||||
or request input required to resume execution.
|
||||
|
||||
In a given node, the first invocation of this function raises a `GraphInterrupt`
|
||||
exception, halting execution. The provided `value` is included with the exception
|
||||
and sent to the client executing the graph.
|
||||
|
||||
A client resuming the graph must use the [`Command`][langgraph.types.Command]
|
||||
primitive to specify a value for the interrupt and continue execution.
|
||||
The graph resumes from the start of the node, **re-executing** all logic.
|
||||
|
||||
If a node contains multiple `interrupt` calls, LangGraph matches resume values
|
||||
to interrupts based on their order in the node. This list of resume values
|
||||
is scoped to the specific task executing the node and is not shared across tasks.
|
||||
|
||||
To use an `interrupt`, you must enable a checkpointer, as the feature relies
|
||||
on persisting the graph state.
|
||||
|
||||
Example:
|
||||
```python
|
||||
import uuid
|
||||
from typing import TypedDict, Optional
|
||||
|
||||
from langgraph.checkpoint.memory import MemorySaver
|
||||
from langgraph.constants import START
|
||||
from langgraph.graph import StateGraph
|
||||
from langgraph.types import interrupt
|
||||
|
||||
|
||||
class State(TypedDict):
|
||||
\"\"\"The graph state.\"\"\"
|
||||
|
||||
foo: str
|
||||
human_value: Optional[str]
|
||||
\"\"\"Human value will be updated using an interrupt.\"\"\"
|
||||
|
||||
|
||||
def node(state: State):
|
||||
answer = interrupt(
|
||||
# This value will be sent to the client
|
||||
# as part of the interrupt information.
|
||||
\"what is your age?\"
|
||||
)
|
||||
print(f\"> Received an input from the interrupt: {answer}\")
|
||||
return {\"human_value\": answer}
|
||||
|
||||
|
||||
builder = StateGraph(State)
|
||||
builder.add_node(\"node\", node)
|
||||
builder.add_edge(START, \"node\")
|
||||
|
||||
# A checkpointer must be enabled for interrupts to work!
|
||||
checkpointer = MemorySaver()
|
||||
graph = builder.compile(checkpointer=checkpointer)
|
||||
|
||||
config = {
|
||||
\"configurable\": {
|
||||
\"thread_id\": uuid.uuid4(),
|
||||
}
|
||||
}
|
||||
|
||||
for chunk in graph.stream({\"foo\": \"abc\"}, config):
|
||||
print(chunk)
|
||||
```
|
||||
|
||||
```pycon
|
||||
{'__interrupt__': (Interrupt(value='what is your age?', resumable=True, ns=['node:62e598fa-8653-9d6d-2046-a70203020e37'], when='during'),)}
|
||||
```
|
||||
|
||||
```python
|
||||
command = Command(resume=\"some input from a human!!!\")
|
||||
|
||||
for chunk in graph.stream(Command(resume=\"some input from a human!!!\"), config):
|
||||
print(chunk)
|
||||
```
|
||||
|
||||
```pycon
|
||||
Received an input from the interrupt: some input from a human!!!
|
||||
{'node': {'human_value': 'some input from a human!!!'}}
|
||||
```
|
||||
|
||||
Args:
|
||||
value: The value to surface to the client when the graph is interrupted.
|
||||
|
||||
Returns:
|
||||
Any: On subsequent invocations within the same node (same task to be precise), returns the value provided during the first invocation
|
||||
|
||||
Raises:
|
||||
GraphInterrupt: On the first invocation within the node, halts execution and surfaces the provided value to the client.
|
||||
"""
|
||||
from langgraph.constants import (
|
||||
CONFIG_KEY_CHECKPOINT_NS,
|
||||
CONFIG_KEY_SCRATCHPAD,
|
||||
|
||||
@@ -1,5 +1,5 @@
|
||||
import dataclasses
|
||||
from typing import Any, Optional, Type, Union
|
||||
from typing import Any, Generator, Optional, Type, Union, get_type_hints
|
||||
|
||||
from typing_extensions import Annotated, NotRequired, ReadOnly, Required, get_origin
|
||||
|
||||
@@ -106,3 +106,44 @@ def get_field_default(name: str, type_: Any, schema: Type[Any]) -> Any:
|
||||
if _is_optional_type(type_):
|
||||
return None
|
||||
return ...
|
||||
|
||||
|
||||
def get_enhanced_type_hints(
|
||||
type: Type[Any],
|
||||
) -> Generator[tuple[str, Any, Any, Optional[str]], None, None]:
|
||||
"""Attempt to extract default values and descriptions from provided type, used for config schema."""
|
||||
for name, typ in get_type_hints(type).items():
|
||||
default = None
|
||||
description = None
|
||||
|
||||
# Pydantic models
|
||||
try:
|
||||
if hasattr(type, "__fields__") and name in type.__fields__:
|
||||
field = type.__fields__[name]
|
||||
|
||||
if hasattr(field, "description") and field.description is not None:
|
||||
description = field.description
|
||||
|
||||
if hasattr(field, "default") and field.default is not None:
|
||||
default = field.default
|
||||
if (
|
||||
hasattr(default, "__class__")
|
||||
and getattr(default.__class__, "__name__", "")
|
||||
== "PydanticUndefinedType"
|
||||
):
|
||||
default = None
|
||||
|
||||
except (AttributeError, KeyError, TypeError):
|
||||
pass
|
||||
|
||||
# TypedDict, dataclass
|
||||
try:
|
||||
if hasattr(type, "__dict__"):
|
||||
type_dict = getattr(type, "__dict__")
|
||||
|
||||
if name in type_dict:
|
||||
default = type_dict[name]
|
||||
except (AttributeError, KeyError, TypeError):
|
||||
pass
|
||||
|
||||
yield name, typ, default, description
|
||||
|
||||
@@ -404,12 +404,10 @@ class RunnableSeq(Runnable):
|
||||
config = patch_config(
|
||||
config, callbacks=run_manager.get_child(f"seq:step:{i+1}")
|
||||
)
|
||||
context = copy_context()
|
||||
context.run(_set_config_context, config)
|
||||
if i == 0:
|
||||
input = context.run(step.invoke, input, config, **kwargs)
|
||||
input = step.invoke(input, config, **kwargs)
|
||||
else:
|
||||
input = context.run(step.invoke, input, config)
|
||||
input = step.invoke(input, config)
|
||||
# finish the root run
|
||||
except BaseException as e:
|
||||
run_manager.on_chain_error(e)
|
||||
@@ -443,16 +441,10 @@ class RunnableSeq(Runnable):
|
||||
config = patch_config(
|
||||
config, callbacks=run_manager.get_child(f"seq:step:{i+1}")
|
||||
)
|
||||
context = copy_context()
|
||||
context.run(_set_config_context, config)
|
||||
if i == 0:
|
||||
coro = step.ainvoke(input, config, **kwargs)
|
||||
input = await step.ainvoke(input, config, **kwargs)
|
||||
else:
|
||||
coro = step.ainvoke(input, config)
|
||||
if ASYNCIO_ACCEPTS_CONTEXT:
|
||||
input = await asyncio.create_task(coro, context=context)
|
||||
else:
|
||||
input = await asyncio.create_task(coro)
|
||||
input = await step.ainvoke(input, config)
|
||||
# finish the root run
|
||||
except BaseException as e:
|
||||
await run_manager.on_chain_error(e)
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
[tool.poetry]
|
||||
name = "langgraph"
|
||||
version = "0.2.57"
|
||||
version = "0.2.59"
|
||||
description = "Building stateful, multi-actor applications with LLMs"
|
||||
authors = []
|
||||
license = "MIT"
|
||||
|
||||
File diff suppressed because one or more lines are too long
@@ -1,230 +1,4 @@
|
||||
# serializer version: 1
|
||||
# name: test_branch_then.1
|
||||
'''
|
||||
%%{init: {'flowchart': {'curve': 'linear'}}}%%
|
||||
graph TD;
|
||||
__start__([__start__]):::first
|
||||
prepare(prepare)
|
||||
tool_two_slow(tool_two_slow)
|
||||
tool_two_fast(tool_two_fast)
|
||||
finish(finish)
|
||||
__end__([__end__]):::last
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
classDef default fill:#f2f0ff,line-height:1.2
|
||||
classDef first fill-opacity:0
|
||||
classDef last fill:#bfb6fc
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[duckdb]
|
||||
'''
|
||||
graph TD;
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[duckdb].1
|
||||
'''
|
||||
%%{init: {'flowchart': {'curve': 'linear'}}}%%
|
||||
graph TD;
|
||||
__start__([<p>__start__</p>]):::first
|
||||
prepare(prepare)
|
||||
tool_two_slow(tool_two_slow)
|
||||
tool_two_fast(tool_two_fast)
|
||||
finish(finish)
|
||||
__end__([<p>__end__</p>]):::last
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
classDef default fill:#f2f0ff,line-height:1.2
|
||||
classDef first fill-opacity:0
|
||||
classDef last fill:#bfb6fc
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[memory]
|
||||
'''
|
||||
graph TD;
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[memory].1
|
||||
'''
|
||||
%%{init: {'flowchart': {'curve': 'linear'}}}%%
|
||||
graph TD;
|
||||
__start__([<p>__start__</p>]):::first
|
||||
prepare(prepare)
|
||||
tool_two_slow(tool_two_slow)
|
||||
tool_two_fast(tool_two_fast)
|
||||
finish(finish)
|
||||
__end__([<p>__end__</p>]):::last
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
classDef default fill:#f2f0ff,line-height:1.2
|
||||
classDef first fill-opacity:0
|
||||
classDef last fill:#bfb6fc
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[postgres]
|
||||
'''
|
||||
graph TD;
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[postgres].1
|
||||
'''
|
||||
%%{init: {'flowchart': {'curve': 'linear'}}}%%
|
||||
graph TD;
|
||||
__start__([<p>__start__</p>]):::first
|
||||
prepare(prepare)
|
||||
tool_two_slow(tool_two_slow)
|
||||
tool_two_fast(tool_two_fast)
|
||||
finish(finish)
|
||||
__end__([<p>__end__</p>]):::last
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
classDef default fill:#f2f0ff,line-height:1.2
|
||||
classDef first fill-opacity:0
|
||||
classDef last fill:#bfb6fc
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[postgres_pipe]
|
||||
'''
|
||||
graph TD;
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[postgres_pipe].1
|
||||
'''
|
||||
%%{init: {'flowchart': {'curve': 'linear'}}}%%
|
||||
graph TD;
|
||||
__start__([<p>__start__</p>]):::first
|
||||
prepare(prepare)
|
||||
tool_two_slow(tool_two_slow)
|
||||
tool_two_fast(tool_two_fast)
|
||||
finish(finish)
|
||||
__end__([<p>__end__</p>]):::last
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
classDef default fill:#f2f0ff,line-height:1.2
|
||||
classDef first fill-opacity:0
|
||||
classDef last fill:#bfb6fc
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[postgres_pool]
|
||||
'''
|
||||
graph TD;
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[postgres_pool].1
|
||||
'''
|
||||
%%{init: {'flowchart': {'curve': 'linear'}}}%%
|
||||
graph TD;
|
||||
__start__([<p>__start__</p>]):::first
|
||||
prepare(prepare)
|
||||
tool_two_slow(tool_two_slow)
|
||||
tool_two_fast(tool_two_fast)
|
||||
finish(finish)
|
||||
__end__([<p>__end__</p>]):::last
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
classDef default fill:#f2f0ff,line-height:1.2
|
||||
classDef first fill-opacity:0
|
||||
classDef last fill:#bfb6fc
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[sqlite]
|
||||
'''
|
||||
graph TD;
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_branch_then[sqlite].1
|
||||
'''
|
||||
%%{init: {'flowchart': {'curve': 'linear'}}}%%
|
||||
graph TD;
|
||||
__start__([<p>__start__</p>]):::first
|
||||
prepare(prepare)
|
||||
tool_two_slow(tool_two_slow)
|
||||
tool_two_fast(tool_two_fast)
|
||||
finish(finish)
|
||||
__end__([<p>__end__</p>]):::last
|
||||
__start__ --> prepare;
|
||||
finish --> __end__;
|
||||
prepare -.-> tool_two_slow;
|
||||
tool_two_slow --> finish;
|
||||
prepare -.-> tool_two_fast;
|
||||
tool_two_fast --> finish;
|
||||
classDef default fill:#f2f0ff,line-height:1.2
|
||||
classDef first fill-opacity:0
|
||||
classDef last fill:#bfb6fc
|
||||
|
||||
'''
|
||||
# ---
|
||||
# name: test_conditional_entrypoint_graph
|
||||
'{"title": "LangGraphInput"}'
|
||||
# ---
|
||||
|
||||
@@ -0,0 +1,43 @@
|
||||
from typing import Literal, Union
|
||||
|
||||
from pydantic import BaseModel
|
||||
|
||||
|
||||
# define these objects to avoid importing langchain_core.agents
|
||||
# and therefore avoid relying on core Pydantic version
|
||||
class AgentAction(BaseModel):
|
||||
tool: str
|
||||
tool_input: Union[str, dict]
|
||||
log: str
|
||||
type: Literal["AgentAction"] = "AgentAction"
|
||||
|
||||
model_config = {
|
||||
"json_schema_extra": {
|
||||
"description": (
|
||||
"""Represents a request to execute an action by an agent.
|
||||
|
||||
The action consists of the name of the tool to execute and the input to pass
|
||||
to the tool. The log is used to pass along extra information about the action."""
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
class AgentFinish(BaseModel):
|
||||
"""Final return value of an ActionAgent.
|
||||
|
||||
Agents return an AgentFinish when they have reached a stopping condition.
|
||||
"""
|
||||
|
||||
return_values: dict
|
||||
log: str
|
||||
type: Literal["AgentFinish"] = "AgentFinish"
|
||||
model_config = {
|
||||
"json_schema_extra": {
|
||||
"description": (
|
||||
"""Final return value of an ActionAgent.
|
||||
|
||||
Agents return an AgentFinish when they have reached a stopping condition."""
|
||||
)
|
||||
}
|
||||
}
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
+310
-10039
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@@ -21,7 +21,11 @@ from typing_extensions import Annotated, NotRequired, Required
|
||||
|
||||
from langgraph.graph import END, StateGraph
|
||||
from langgraph.graph.graph import CompiledGraph
|
||||
from langgraph.utils.fields import _is_optional_type, get_field_default
|
||||
from langgraph.utils.fields import (
|
||||
_is_optional_type,
|
||||
get_enhanced_type_hints,
|
||||
get_field_default,
|
||||
)
|
||||
from langgraph.utils.runnable import is_async_callable, is_async_generator
|
||||
|
||||
pytestmark = pytest.mark.anyio
|
||||
@@ -227,3 +231,57 @@ def test_is_required():
|
||||
assert get_field_default("val_12", gcannos["val_12"], MyGrandChildDict) is None
|
||||
assert get_field_default("val_9", gcannos["val_9"], MyGrandChildDict) is None
|
||||
assert get_field_default("val_13", gcannos["val_13"], MyGrandChildDict) == ...
|
||||
|
||||
|
||||
def test_enhanced_type_hints() -> None:
|
||||
from dataclasses import dataclass
|
||||
from typing import Annotated
|
||||
|
||||
from pydantic import BaseModel, Field
|
||||
|
||||
class MyTypedDict(TypedDict):
|
||||
val_1: str
|
||||
val_2: int = 42
|
||||
val_3: str = "default"
|
||||
|
||||
hints = list(get_enhanced_type_hints(MyTypedDict))
|
||||
assert len(hints) == 3
|
||||
assert hints[0] == ("val_1", str, None, None)
|
||||
assert hints[1] == ("val_2", int, 42, None)
|
||||
assert hints[2] == ("val_3", str, "default", None)
|
||||
|
||||
@dataclass
|
||||
class MyDataclass:
|
||||
val_1: str
|
||||
val_2: int = 42
|
||||
val_3: str = "default"
|
||||
|
||||
hints = list(get_enhanced_type_hints(MyDataclass))
|
||||
assert len(hints) == 3
|
||||
assert hints[0] == ("val_1", str, None, None)
|
||||
assert hints[1] == ("val_2", int, 42, None)
|
||||
assert hints[2] == ("val_3", str, "default", None)
|
||||
|
||||
class MyPydanticModel(BaseModel):
|
||||
val_1: str
|
||||
val_2: int = 42
|
||||
val_3: str = Field(default="default", description="A description")
|
||||
|
||||
hints = list(get_enhanced_type_hints(MyPydanticModel))
|
||||
assert len(hints) == 3
|
||||
assert hints[0] == ("val_1", str, None, None)
|
||||
assert hints[1] == ("val_2", int, 42, None)
|
||||
assert hints[2] == ("val_3", str, "default", "A description")
|
||||
|
||||
class MyPydanticModelWithAnnotated(BaseModel):
|
||||
val_1: Annotated[str, Field(description="A description")]
|
||||
val_2: Annotated[int, Field(default=42)]
|
||||
val_3: Annotated[
|
||||
str, Field(default="default", description="Another description")
|
||||
]
|
||||
|
||||
hints = list(get_enhanced_type_hints(MyPydanticModelWithAnnotated))
|
||||
assert len(hints) == 3
|
||||
assert hints[0] == ("val_1", str, None, "A description")
|
||||
assert hints[1] == ("val_2", int, 42, None)
|
||||
assert hints[2] == ("val_3", str, "default", "Another description")
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
{
|
||||
"name": "@langchain/langgraph-sdk",
|
||||
"version": "0.0.31",
|
||||
"version": "0.0.32",
|
||||
"description": "Client library for interacting with the LangGraph API",
|
||||
"type": "module",
|
||||
"packageManager": "yarn@1.22.19",
|
||||
|
||||
@@ -1318,7 +1318,9 @@ class RunsClient:
|
||||
""" # noqa: E501
|
||||
payload = {
|
||||
"input": input,
|
||||
"command": command,
|
||||
"command": {k: v for k, v in command.items() if v is not None}
|
||||
if command
|
||||
else None,
|
||||
"config": config,
|
||||
"metadata": metadata,
|
||||
"stream_mode": stream_mode,
|
||||
@@ -1503,7 +1505,9 @@ class RunsClient:
|
||||
""" # noqa: E501
|
||||
payload = {
|
||||
"input": input,
|
||||
"command": command,
|
||||
"command": {k: v for k, v in command.items() if v is not None}
|
||||
if command
|
||||
else None,
|
||||
"stream_mode": stream_mode,
|
||||
"stream_subgraphs": stream_subgraphs,
|
||||
"config": config,
|
||||
@@ -1672,7 +1676,9 @@ class RunsClient:
|
||||
""" # noqa: E501
|
||||
payload = {
|
||||
"input": input,
|
||||
"command": command,
|
||||
"command": {k: v for k, v in command.items() if v is not None}
|
||||
if command
|
||||
else None,
|
||||
"config": config,
|
||||
"metadata": metadata,
|
||||
"assistant_id": assistant_id,
|
||||
@@ -3477,7 +3483,9 @@ class SyncRunsClient:
|
||||
""" # noqa: E501
|
||||
payload = {
|
||||
"input": input,
|
||||
"command": command,
|
||||
"command": {k: v for k, v in command.items() if v is not None}
|
||||
if command
|
||||
else None,
|
||||
"config": config,
|
||||
"metadata": metadata,
|
||||
"stream_mode": stream_mode,
|
||||
@@ -3662,7 +3670,9 @@ class SyncRunsClient:
|
||||
""" # noqa: E501
|
||||
payload = {
|
||||
"input": input,
|
||||
"command": command,
|
||||
"command": {k: v for k, v in command.items() if v is not None}
|
||||
if command
|
||||
else None,
|
||||
"stream_mode": stream_mode,
|
||||
"stream_subgraphs": stream_subgraphs,
|
||||
"config": config,
|
||||
@@ -3828,7 +3838,9 @@ class SyncRunsClient:
|
||||
""" # noqa: E501
|
||||
payload = {
|
||||
"input": input,
|
||||
"command": command,
|
||||
"command": {k: v for k, v in command.items() if v is not None}
|
||||
if command
|
||||
else None,
|
||||
"config": config,
|
||||
"metadata": metadata,
|
||||
"assistant_id": assistant_id,
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
[tool.poetry]
|
||||
name = "langgraph-sdk"
|
||||
version = "0.1.43"
|
||||
version = "0.1.44"
|
||||
description = "SDK for interacting with LangGraph API"
|
||||
authors = []
|
||||
license = "MIT"
|
||||
|
||||
Generated
+36
-24
@@ -2933,13 +2933,13 @@ tenacity = ">=8.1.0,<8.4.0 || >8.4.0,<9.0.0"
|
||||
|
||||
[[package]]
|
||||
name = "langchain-core"
|
||||
version = "0.3.21"
|
||||
version = "0.3.23"
|
||||
description = "Building applications with LLMs through composability"
|
||||
optional = false
|
||||
python-versions = "<4.0,>=3.9"
|
||||
files = [
|
||||
{file = "langchain_core-0.3.21-py3-none-any.whl", hash = "sha256:7e723dff80946a1198976c6876fea8326dc82566ef9bcb5f8d9188f738733665"},
|
||||
{file = "langchain_core-0.3.21.tar.gz", hash = "sha256:561b52b258ffa50a9fb11d7a1940ebfd915654d1ec95b35e81dfd5ee84143411"},
|
||||
{file = "langchain_core-0.3.23-py3-none-any.whl", hash = "sha256:550c0b996990830fa6515a71a1192a8a0343367999afc36d4ede14222941e420"},
|
||||
{file = "langchain_core-0.3.23.tar.gz", hash = "sha256:f9e175e3b82063cc3b160c2ca2b155832e1c6f915312e1204828f97d4aabf6e1"},
|
||||
]
|
||||
|
||||
[package.dependencies]
|
||||
@@ -3005,18 +3005,18 @@ pillow = ">=10.3.0,<11.0.0"
|
||||
|
||||
[[package]]
|
||||
name = "langchain-openai"
|
||||
version = "0.2.1"
|
||||
version = "0.2.12"
|
||||
description = "An integration package connecting OpenAI and LangChain"
|
||||
optional = false
|
||||
python-versions = "<4.0,>=3.9"
|
||||
files = [
|
||||
{file = "langchain_openai-0.2.1-py3-none-any.whl", hash = "sha256:215efa4526c88f8105f002b43b7cbf98cebd9baeb4f62c3b58faebdb578715bc"},
|
||||
{file = "langchain_openai-0.2.1.tar.gz", hash = "sha256:a131ea18736f1a8792925391b91a8c8bd834431ffc2055c92ba49f59c3dcaaf0"},
|
||||
{file = "langchain_openai-0.2.12-py3-none-any.whl", hash = "sha256:916965c45584d9ea565825ad3bb7629b1ff57f12f36d4b937e5b7d65903839d6"},
|
||||
{file = "langchain_openai-0.2.12.tar.gz", hash = "sha256:8b92096623065a2820e89aa5fb0a262fb109d56c346e3b09ba319af424c45cd1"},
|
||||
]
|
||||
|
||||
[package.dependencies]
|
||||
langchain-core = ">=0.3,<0.4"
|
||||
openai = ">=1.40.0,<2.0.0"
|
||||
langchain-core = ">=0.3.21,<0.4.0"
|
||||
openai = ">=1.55.3,<2.0.0"
|
||||
tiktoken = ">=0.7,<1"
|
||||
|
||||
[[package]]
|
||||
@@ -3035,7 +3035,7 @@ langchain-core = ">=0.3.0,<0.4.0"
|
||||
|
||||
[[package]]
|
||||
name = "langgraph"
|
||||
version = "0.2.54"
|
||||
version = "0.2.59"
|
||||
description = "Building stateful, multi-actor applications with LLMs"
|
||||
optional = false
|
||||
python-versions = ">=3.9.0,<4.0"
|
||||
@@ -3043,7 +3043,7 @@ files = []
|
||||
develop = true
|
||||
|
||||
[package.dependencies]
|
||||
langchain-core = ">=0.2.43,<0.4.0,!=0.3.0,!=0.3.1,!=0.3.2,!=0.3.3,!=0.3.4,!=0.3.5,!=0.3.6,!=0.3.7,!=0.3.8,!=0.3.9,!=0.3.10,!=0.3.11,!=0.3.12,!=0.3.13,!=0.3.14"
|
||||
langchain-core = ">=0.2.43,<0.4.0,!=0.3.0,!=0.3.1,!=0.3.2,!=0.3.3,!=0.3.4,!=0.3.5,!=0.3.6,!=0.3.7,!=0.3.8,!=0.3.9,!=0.3.10,!=0.3.11,!=0.3.12,!=0.3.13,!=0.3.14,!=0.3.15,!=0.3.16,!=0.3.17,!=0.3.18,!=0.3.19,!=0.3.20,!=0.3.21,!=0.3.22"
|
||||
langgraph-checkpoint = "^2.0.4"
|
||||
langgraph-sdk = "^0.1.42"
|
||||
|
||||
@@ -3068,9 +3068,26 @@ msgpack = "^1.1.0"
|
||||
type = "directory"
|
||||
url = "libs/checkpoint"
|
||||
|
||||
[[package]]
|
||||
name = "langgraph-checkpoint-mongodb"
|
||||
version = "0.1.0"
|
||||
description = "Library with a MongoDB implementation of LangGraph checkpoint saver."
|
||||
optional = false
|
||||
python-versions = "<4.0.0,>=3.9.0"
|
||||
files = [
|
||||
{file = "langgraph_checkpoint_mongodb-0.1.0-py3-none-any.whl", hash = "sha256:52f20956b36e0275ff805a1eea1db4c1a7e5e0ffe0a1ade65969004fa1654703"},
|
||||
{file = "langgraph_checkpoint_mongodb-0.1.0.tar.gz", hash = "sha256:3165c134ad5c82a3fe02fef04c81dcd48a3f5d031e07a9d1cb84457241f76793"},
|
||||
]
|
||||
|
||||
[package.dependencies]
|
||||
langgraph = ">=0.2.38,<0.3.0"
|
||||
langgraph-checkpoint = ">=2.0.0,<3.0.0"
|
||||
motor = ">3.5.0"
|
||||
pymongo = ">=4.9.0,<4.10.0"
|
||||
|
||||
[[package]]
|
||||
name = "langgraph-checkpoint-postgres"
|
||||
version = "2.0.7"
|
||||
version = "2.0.8"
|
||||
description = "Library with a Postgres implementation of LangGraph checkpoint saver."
|
||||
optional = false
|
||||
python-versions = "^3.9.0,<4.0"
|
||||
@@ -3106,7 +3123,7 @@ url = "libs/checkpoint-sqlite"
|
||||
|
||||
[[package]]
|
||||
name = "langgraph-sdk"
|
||||
version = "0.1.42"
|
||||
version = "0.1.43"
|
||||
description = "SDK for interacting with LangGraph API"
|
||||
optional = false
|
||||
python-versions = "^3.9.0,<4.0"
|
||||
@@ -3585,6 +3602,7 @@ optional = false
|
||||
python-versions = ">=3.6"
|
||||
files = [
|
||||
{file = "mkdocs-redirects-1.2.1.tar.gz", hash = "sha256:9420066d70e2a6bb357adf86e67023dcdca1857f97f07c7fe450f8f1fb42f861"},
|
||||
{file = "mkdocs_redirects-1.2.1-py3-none-any.whl", hash = "sha256:497089f9e0219e7389304cffefccdfa1cac5ff9509f2cb706f4c9b221726dffb"},
|
||||
]
|
||||
|
||||
[package.dependencies]
|
||||
@@ -4338,13 +4356,13 @@ sympy = "*"
|
||||
|
||||
[[package]]
|
||||
name = "openai"
|
||||
version = "1.50.1"
|
||||
version = "1.57.2"
|
||||
description = "The official Python library for the openai API"
|
||||
optional = false
|
||||
python-versions = ">=3.7.1"
|
||||
python-versions = ">=3.8"
|
||||
files = [
|
||||
{file = "openai-1.50.1-py3-none-any.whl", hash = "sha256:7967fc8372d5e005ad61514586fb286d593facafccedbee00416bc38ee07c2e6"},
|
||||
{file = "openai-1.50.1.tar.gz", hash = "sha256:80cbdf275488894c70bfbad711dbba6f31ea71d579b97e364bfd99cdf030158e"},
|
||||
{file = "openai-1.57.2-py3-none-any.whl", hash = "sha256:f7326283c156fdee875746e7e54d36959fb198eadc683952ee05e3302fbd638d"},
|
||||
{file = "openai-1.57.2.tar.gz", hash = "sha256:5f49fd0f38e9f2131cda7deb45dafdd1aee4f52a637e190ce0ecf40147ce8cee"},
|
||||
]
|
||||
|
||||
[package.dependencies]
|
||||
@@ -5096,7 +5114,6 @@ description = "Pure-Python implementation of ASN.1 types and DER/BER/CER codecs
|
||||
optional = false
|
||||
python-versions = ">=3.8"
|
||||
files = [
|
||||
{file = "pyasn1-0.6.1-py3-none-any.whl", hash = "sha256:0d632f46f2ba09143da3a8afe9e33fb6f92fa2320ab7e886e2d0f7672af84629"},
|
||||
{file = "pyasn1-0.6.1.tar.gz", hash = "sha256:6f580d2bdd84365380830acf45550f2511469f673cb4a5ae3857a3170128b034"},
|
||||
]
|
||||
|
||||
@@ -5107,7 +5124,6 @@ description = "A collection of ASN.1-based protocols modules"
|
||||
optional = false
|
||||
python-versions = ">=3.8"
|
||||
files = [
|
||||
{file = "pyasn1_modules-0.4.1-py3-none-any.whl", hash = "sha256:49bfa96b45a292b711e986f222502c1c9a5e1f4e568fc30e2574a6c7d07838fd"},
|
||||
{file = "pyasn1_modules-0.4.1.tar.gz", hash = "sha256:c28e2dbf9c06ad61c71a075c7e0f9fd0f1b0bb2d2ad4377f240d33ac2ab60a7c"},
|
||||
]
|
||||
|
||||
@@ -6167,11 +6183,6 @@ files = [
|
||||
{file = "scikit_learn-1.5.2-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:f60021ec1574e56632be2a36b946f8143bf4e5e6af4a06d85281adc22938e0dd"},
|
||||
{file = "scikit_learn-1.5.2-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:394397841449853c2290a32050382edaec3da89e35b3e03d6cc966aebc6a8ae6"},
|
||||
{file = "scikit_learn-1.5.2-cp312-cp312-win_amd64.whl", hash = "sha256:57cc1786cfd6bd118220a92ede80270132aa353647684efa385a74244a41e3b1"},
|
||||
{file = "scikit_learn-1.5.2-cp313-cp313-macosx_10_13_x86_64.whl", hash = "sha256:e9a702e2de732bbb20d3bad29ebd77fc05a6b427dc49964300340e4c9328b3f5"},
|
||||
{file = "scikit_learn-1.5.2-cp313-cp313-macosx_12_0_arm64.whl", hash = "sha256:b0768ad641981f5d3a198430a1d31c3e044ed2e8a6f22166b4d546a5116d7908"},
|
||||
{file = "scikit_learn-1.5.2-cp313-cp313-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:178ddd0a5cb0044464fc1bfc4cca5b1833bfc7bb022d70b05db8530da4bb3dd3"},
|
||||
{file = "scikit_learn-1.5.2-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:f7284ade780084d94505632241bf78c44ab3b6f1e8ccab3d2af58e0e950f9c12"},
|
||||
{file = "scikit_learn-1.5.2-cp313-cp313-win_amd64.whl", hash = "sha256:b7b0f9a0b1040830d38c39b91b3a44e1b643f4b36e36567b80b7c6bd2202a27f"},
|
||||
{file = "scikit_learn-1.5.2-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:757c7d514ddb00ae249832fe87100d9c73c6ea91423802872d9e74970a0e40b9"},
|
||||
{file = "scikit_learn-1.5.2-cp39-cp39-macosx_12_0_arm64.whl", hash = "sha256:52788f48b5d8bca5c0736c175fa6bdaab2ef00a8f536cda698db61bd89c551c1"},
|
||||
{file = "scikit_learn-1.5.2-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:643964678f4b5fbdc95cbf8aec638acc7aa70f5f79ee2cdad1eec3df4ba6ead8"},
|
||||
@@ -6962,6 +6973,7 @@ description = "Automatically mock your HTTP interactions to simplify and speed u
|
||||
optional = false
|
||||
python-versions = ">=3.8"
|
||||
files = [
|
||||
{file = "vcrpy-6.0.1-py2.py3-none-any.whl", hash = "sha256:621c3fb2d6bd8aa9f87532c688e4575bcbbde0c0afeb5ebdb7e14cac409edfdd"},
|
||||
{file = "vcrpy-6.0.1.tar.gz", hash = "sha256:9e023fee7f892baa0bbda2f7da7c8ac51165c1c6e38ff8688683a12a4bde9278"},
|
||||
]
|
||||
|
||||
@@ -7473,4 +7485,4 @@ type = ["pytest-mypy"]
|
||||
[metadata]
|
||||
lock-version = "2.0"
|
||||
python-versions = "^3.10"
|
||||
content-hash = "cf18eed5e183fc4f7786d095540b6c9261e130750f2d1fcc427e08b78d522c61"
|
||||
content-hash = "367f5fb480a8fa5d8ab1c0964a1e9450dbb28e6998097e7536966e7a5fe30c90"
|
||||
|
||||
@@ -41,6 +41,7 @@ langchain-nomic = "^0.1.3"
|
||||
langchain-fireworks = "^0.2.0"
|
||||
langchain-community = "^0.3.0"
|
||||
langchain-experimental = "^0.3.2"
|
||||
langgraph-checkpoint-mongodb = "^0.1.0"
|
||||
langsmith = "^0.1.129"
|
||||
chromadb = "^0.5.5"
|
||||
gpt4all = "^2.8.2"
|
||||
|
||||
Reference in New Issue
Block a user