Compare commits

...
36 Commits
Author SHA1 Message Date
Nuno CamposandGitHub 477a43dae0 Update pyproject.toml 2025-03-17 21:58:49 -07:00
Nuno CamposandGitHub fc8e6ec64f When using global resume value, ensure subgraphs consume it (#3889)
- Previously the global resume value was passed to subgraphs without
being consumed
- This would result in two parallel subgraph calls being able to use the
same resume value
- Note this behavior can't be implemented over the wire, that will be
fixed in future PR

Closes #3398
2025-03-17 21:26:33 -07:00
Nuno Campos dd16ae4ba5 When using global resume value, ensure subgraphs consume it
- Previously the global resume value was passed to subgraphs without being consumed
- This would result in two parallel subgraph calls being able to use the same resume value
- Note this behavior can't be implemented over the wire, that will be fixed in future PR
2025-03-17 20:31:54 -07:00
Nuno CamposandGitHub e24e141253 Fix concurrency issue in PregelScratchpad.consume_null_resume (#3888)
- Need to use a single operation to check if present and remove item
from list
- This doesn't fix the separate issue that parallel tasks claiming a
single interrupt value have somewhat undefined behavior (in the sense
that they will race to be the first to take it). That will be fixed in a
future PR

Closes #3875
2025-03-17 20:22:20 -07:00
Nuno Campos eae1faa656 Fix 2025-03-17 20:12:33 -07:00
Nuno Campos 1976d6584c Lint 2025-03-17 20:00:33 -07:00
Nuno Campos 54e18445fc Fix concurrency issue in PregelScratchpad.consume_null_resume
- Need to use a single operation to check if present and remove item from list
- This doesn't fix the separate issue that parallel tasks claiming a single interrupt value have somewhat undefined behavior (in the sense that they will race to be the first to take it). That will be fixed in a future PR
2025-03-17 19:53:03 -07:00
Nuno Campos 69dc29aaf9 0.3.13 2025-03-17 18:52:09 -07:00
Nuno CamposandGitHub aa5ff74845 Fix missing interrupts in stream (#3886)
- When multiple parallel tasks and/or subgraphs emit interrupts some
were missing from stream output
2025-03-17 18:51:42 -07:00
Nuno CamposandGitHub 6049aaa842 Enable xray for remote graphs (#3879) 2025-03-17 18:49:51 -07:00
Nuno Campos 576aa1ca02 Order 2025-03-17 18:41:36 -07:00
Nuno Campos e28e97d5e0 Lint 2025-03-17 18:39:13 -07:00
Nuno Campos 59e7c63c93 Lint 2025-03-17 18:38:37 -07:00
Nuno Campos be7dee1c3b Fix 2025-03-17 18:35:53 -07:00
Nuno Campos 0aafa04bac WIP Fix missing interrupts in stream
- When multiple parallel tasks and/or subgraphs emit interrupts some were missing from stream output
2025-03-17 18:31:15 -07:00
Nuno CamposandGitHub 2e1adaa867 0.3.12 2025-03-17 16:56:34 -07:00
Nuno CamposandGitHub 3f8b165592 Update state.py 2025-03-17 16:56:09 -07:00
William FHandGitHub 9ed0fa196c langgraph-checkpoint 2.0.21 (#3883) 2025-03-17 15:25:26 -07:00
William Fu-Hinthorn 0b9adc28c3 langgraph-checkpoint 2.0.21 2025-03-17 15:15:29 -07:00
William FHandGitHub 3b0255d1ef Check that migrations are idempotent (#3881) 2025-03-17 15:13:59 -07:00
William FHandGitHub d4255a0645 Merge branch 'main' into wfh/idempotency_test_ 2025-03-17 13:27:12 -07:00
William FHandGitHub 80d61a2600 Make expires_at idempotent (#3880) 2025-03-17 13:26:20 -07:00
William Fu-Hinthorn 424f24720a Make expires_at idempotent 2025-03-17 13:25:22 -07:00
William Fu-Hinthorn 2a71180c1d Add tests for idempotency in migraionts 2025-03-17 12:43:21 -07:00
William Fu-Hinthorn 697f878e36 Make expires_at idempotent 2025-03-17 12:38:43 -07:00
Nuno Campos 5db1949ae3 Fix 2025-03-17 09:55:21 -07:00
Nuno Campos ddb29df667 Fix 2025-03-17 09:39:23 -07:00
Nuno Campos fa467573d7 Enable xray for remote graphs 2025-03-17 09:36:33 -07:00
alxdr3kandGitHub def69c59d2 docs: add missing namespace definition in persistence.md (#3859)
- fix typo
- add missing namespace definition for memory store
2025-03-17 09:38:15 -04:00
Nuno Campos bad4d17c34 Remove 'check size' ci job 2025-03-14 21:54:01 -07:00
Nuno Campos 55219b23d8 0.3.11 2025-03-14 16:18:50 -07:00
Nuno CamposandGitHub 8edbd39ad3 Add optional encryption of checkpointer payloads (#3852)
- no dependency on any particular encryption lib (there is no py stdlib
encryption lib)
- works with any modern checkpointer, ie. those which use dumps_typed
and loads_typed methods to serialize data
- uses the default msg pack serializer, but also works with any custom
serializer
- backwards compatible with unencrypted data in same storage (will just
be read unencrypted)
- providing easy constructor to use AES encryption through pycriptodome
library, one single line of code to add it in
- other encryption libraries or algorithms (even assymetric ones) can be
used by implementing the two-method CipherProtocol interface
- cipher name (eg. aes) is stored with encrypted payload for forwards
compatibility

```py
import sqlite3

from langgraph.checkpoint.serde.encrypted import EncryptedSerializer
from langgraph.checkpoint.sqlite import SqliteSaver

# will read AES key from env var LANGGRAPH_AES_KEY
serde = EncryptedSerializer.from_pycryptodome_aes()
# works with any other checkpointer, including custom ones
checkpointer = SqliteSaver(sqlite3.connect('...'), serde=serde)
```
2025-03-14 16:14:29 -07:00
Nuno Campos 4b0fd834d8 Make it possible to implement a cipher that handles multiple protocols 2025-03-14 16:04:28 -07:00
Nuno Campos 0fd2748530 Accept custom serde implementations 2025-03-14 15:43:07 -07:00
Nuno Campos bc0a3419ed Lint 2025-03-14 15:38:22 -07:00
Nuno Campos 5cd47bac49 Add optional encryption of checkpointer payloads
- no dependency on any particular encryption lib (there is no py stdlib encryption lib)
- works with any modern checkpointer, ie. those which use dumps_typed and loads_typed methods to serialize data
- backwards compatible with unencrypted data in same storage (will just be read unencrypted)
- providing easy constructor to use AES encryption through pycriptodome library, one single line of code to add it in
- other encryption libraries or algorithms (even assymetric ones) can be used by implementing the two-method CipherProtocol interface
- cipher name (eg. aes) is stored with encrypted payload for forwards compatibility
2025-03-14 15:32:50 -07:00
26 changed files with 1323 additions and 116 deletions
-29
View File
@@ -1,29 +0,0 @@
name: Check File Size
on:
push:
branches:
- main
pull_request:
branches:
- main
workflow_dispatch:
jobs:
file-size-check:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- name: Get changed files
id: changed-files
uses: tj-actions/changed-files@v44
- name: Filter by size
# TODO: roll back the web voyager hack
run: |
large_added_files=$(find ${{ steps.changed-files.outputs.added_files }} -maxdepth 0 -size +1M | grep -v "web_voyager" || true)
if [ -n "$large_added_files" ]; then
echo "Large files added: $large_added_files"
echo "# Large files added:" >> $GITHUB_STEP_SUMMARY
echo "$large_added_files" >> $GITHUB_STEP_SUMMARY
exit 1
fi
+4 -1
View File
@@ -232,7 +232,7 @@ from langgraph.store.memory import InMemoryStore
in_memory_store = InMemoryStore()
```
Memories are namespaced by a `tuple`, which in this specific example will be `(<user_id>, "memories")`. The namespace can be any length and represent anything, does not have be user specific.
Memories are namespaced by a `tuple`, which in this specific example will be `(<user_id>, "memories")`. The namespace can be any length and represent anything, does not have to be user specific.
```python
user_id = "1"
@@ -387,6 +387,9 @@ We can access the memories and use them in our model call.
def call_model(state: MessagesState, config: RunnableConfig, *, store: BaseStore):
# Get the user id from the config
user_id = config["configurable"]["user_id"]
# Namespace the memory
namespace = (user_id, "memories")
# Search based on the most recent message
memories = store.search(
@@ -79,12 +79,12 @@ CREATE INDEX CONCURRENTLY IF NOT EXISTS store_prefix_idx ON store USING btree (p
"""
-- Add expires_at column to store table
ALTER TABLE store
ADD COLUMN expires_at TIMESTAMP WITH TIME ZONE,
ADD COLUMN ttl_minutes INT;
ADD COLUMN IF NOT EXISTS expires_at TIMESTAMP WITH TIME ZONE,
ADD COLUMN IF NOT EXISTS ttl_minutes INT;
""",
"""
-- Add indexes for efficient TTL sweeping
CREATE INDEX idx_store_expires_at ON store (expires_at)
CREATE INDEX IF NOT EXISTS idx_store_expires_at ON store (expires_at)
WHERE expires_at IS NOT NULL;
""",
]
+1 -1
View File
@@ -1,6 +1,6 @@
[tool.poetry]
name = "langgraph-checkpoint-postgres"
version = "2.0.17"
version = "2.0.18"
description = "Library with a Postgres implementation of LangGraph checkpoint saver."
authors = []
license = "MIT"
@@ -60,15 +60,17 @@ async def store(request) -> AsyncIterator[AsyncPostgresStore]:
) as store:
store.MIGRATIONS = [
(
mig.replace(
"ADD COLUMN ttl_minutes INT;", "ADD COLUMN ttl_minutes FLOAT;"
)
mig.replace("ttl_minutes INT;", "ttl_minutes FLOAT;")
if isinstance(mig, str)
else mig
)
for mig in store.MIGRATIONS
]
await store.setup()
async with store._cursor() as cur:
# drop the migration index
await cur.execute("DROP TABLE IF EXISTS store_migrations")
await store.setup() # Will fail if migrations aren't idempotent
if request.param == "pipe":
async with AsyncPostgresStore.from_conn_string(
+5 -3
View File
@@ -52,9 +52,7 @@ def store(request) -> PostgresStore:
with PostgresStore.from_conn_string(conn_string, ttl=ttl_config) as store:
store.MIGRATIONS = [
(
mig.replace(
"ADD COLUMN ttl_minutes INT;", "ADD COLUMN ttl_minutes FLOAT;"
)
mig.replace("ttl_minutes INT;", "ttl_minutes FLOAT;")
if isinstance(mig, str)
else mig
)
@@ -415,6 +413,10 @@ def _create_vector_store(
ttl={"default_ttl": 2, "refresh_on_read": True} if enable_ttl else None,
) as store:
store.setup()
with store._cursor() as cur:
# drop the migration index
cur.execute("DROP TABLE IF EXISTS store_migrations")
store.setup() # Will fail if migrations aren't idempotent
yield store
finally:
with Connection.connect(admin_conn_string, autocommit=True) as conn:
@@ -45,3 +45,18 @@ def maybe_add_typed_methods(serde: SerializerProtocol) -> SerializerProtocol:
return SerializerCompat(serde)
return serde
class CipherProtocol(Protocol):
"""Protocol for encryption and decryption of data.
- `encrypt`: Encrypt plaintext.
- `decrypt`: Decrypt ciphertext.
"""
def encrypt(self, plaintext: bytes) -> tuple[str, bytes]:
"""Encrypt plaintext. Returns a tuple (cipher name, ciphertext)."""
...
def decrypt(self, ciphername: str, ciphertext: bytes) -> bytes:
"""Decrypt ciphertext. Returns the plaintext."""
...
@@ -0,0 +1,86 @@
import os
from typing import Any
from langgraph.checkpoint.serde.base import CipherProtocol, SerializerProtocol
from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
class EncryptedSerializer(SerializerProtocol):
"""Serializer that encrypts and decrypts data using an encryption protocol."""
def __init__(
self, cipher: CipherProtocol, serde: SerializerProtocol = JsonPlusSerializer()
) -> None:
self.cipher = cipher
self.serde = serde
def dumps(self, obj: Any) -> bytes:
return self.serde.dumps(obj)
def loads(self, data: bytes) -> Any:
return self.serde.loads(data)
def dumps_typed(self, obj: Any) -> tuple[str, bytes]:
"""Serialize an object to a tuple (type, bytes) and encrypt the bytes."""
# serialize data
typ, data = self.serde.dumps_typed(obj)
# encrypt data
ciphername, ciphertext = self.cipher.encrypt(data)
# add cipher name to type
return f"{typ}+{ciphername}", ciphertext
def loads_typed(self, data: tuple[str, bytes]) -> Any:
enc_cipher, ciphertext = data
# unencrypted data
if "+" not in enc_cipher:
return self.serde.loads_typed(data)
# extract cipher name
typ, ciphername = enc_cipher.split("+", 1)
# decrypt data
decrypted_data = self.cipher.decrypt(ciphername, ciphertext)
# deserialize data
return self.serde.loads_typed((typ, decrypted_data))
@classmethod
def from_pycryptodome_aes(
cls, serde: SerializerProtocol = JsonPlusSerializer(), **kwargs: Any
) -> "EncryptedSerializer":
"""Create an EncryptedSerializer using AES encryption."""
try:
from Crypto.Cipher import AES # type: ignore
except ImportError:
raise ImportError(
"Pycryptodome is not installed. Please install it with `pip install pycryptodome`."
) from None
# check if AES key is provided
if "key" in kwargs:
key: bytes = kwargs.pop("key")
else:
key_str = os.getenv("LANGGRAPH_AES_KEY")
if key_str is None:
raise ValueError("LANGGRAPH_AES_KEY environment variable is not set.")
key = key_str.encode()
if len(key) not in (16, 24, 32):
raise ValueError("LANGGRAPH_AES_KEY must be 16, 24, or 32 bytes long.")
# set default mode to EAX if not provided
if kwargs.get("mode") is None:
kwargs["mode"] = AES.MODE_EAX
class PycryptodomeAesCipher(CipherProtocol):
def encrypt(self, plaintext: bytes) -> tuple[str, bytes]:
cipher = AES.new(key, **kwargs)
ciphertext, tag = cipher.encrypt_and_digest(plaintext)
return "aes", cipher.nonce + tag + ciphertext
def decrypt(self, ciphername: str, ciphertext: bytes) -> bytes:
assert ciphername == "aes", f"Unsupported cipher: {ciphername}"
nonce = ciphertext[:16]
tag = ciphertext[16:32]
actual_ciphertext = ciphertext[32:]
cipher = AES.new(key, **kwargs, nonce=nonce)
return cipher.decrypt_and_verify(actual_ciphertext, tag)
return cls(PycryptodomeAesCipher(), serde)
+1 -1
View File
@@ -1,6 +1,6 @@
[tool.poetry]
name = "langgraph-checkpoint"
version = "2.0.20"
version = "2.0.21"
description = "Library with base interfaces for LangGraph checkpoint savers."
authors = []
license = "MIT"
+61 -14
View File
@@ -1,3 +1,4 @@
import asyncio
import logging
from collections import defaultdict
from typing import (
@@ -31,6 +32,7 @@ from langgraph.constants import (
)
from langgraph.graph.branch import Branch
from langgraph.pregel import Channel, Pregel
from langgraph.pregel.protocol import PregelProtocol
from langgraph.pregel.read import PregelNode
from langgraph.pregel.write import ChannelWrite, ChannelWriteEntry
from langgraph.types import All, Checkpointer
@@ -418,7 +420,38 @@ class CompiledGraph(Pregel):
*,
xray: Union[int, bool] = False,
) -> DrawableGraph:
return self.get_graph(config, xray=xray)
"""Returns a drawable representation of the computation graph."""
from langgraph.pregel.remote import RemoteGraph
# gather subgraphs
if xray:
subpregels: dict[str, PregelProtocol] = {
k: v
async for k, v in self.aget_subgraphs()
if isinstance(v, (CompiledGraph, RemoteGraph))
}
subgraphs = {
k: v
for k, v in zip(
subpregels,
await asyncio.gather(
*(
p.aget_graph(
config,
xray=xray
if isinstance(xray, bool) or xray <= 0
else xray - 1,
)
for p in subpregels.values()
)
),
)
}
else:
subgraphs = {}
# draw the graph
return self._draw_graph(config, subgraphs=subgraphs)
def get_graph(
self,
@@ -427,17 +460,36 @@ class CompiledGraph(Pregel):
xray: Union[int, bool] = False,
) -> DrawableGraph:
"""Returns a drawable representation of the computation graph."""
from langgraph.pregel.remote import RemoteGraph
# gather subgraphs
if xray:
subgraphs = {
k: v.get_graph(
config,
xray=xray if isinstance(xray, bool) or xray <= 0 else xray - 1,
)
for k, v in self.get_subgraphs()
if isinstance(v, (CompiledGraph, RemoteGraph))
}
else:
subgraphs = {}
# draw the graph
return self._draw_graph(config, subgraphs=subgraphs)
def _draw_graph(
self,
config: Optional[RunnableConfig] = None,
*,
subgraphs: dict[str, DrawableGraph] = {},
) -> DrawableGraph:
# create the graph
graph = DrawableGraph()
start_nodes: dict[str, DrawableNode] = {
START: graph.add_node(self.get_input_schema(config), START)
}
end_nodes: dict[str, DrawableNode] = {}
if xray:
subgraphs = {
k: v for k, v in self.get_subgraphs() if isinstance(v, CompiledGraph)
}
else:
subgraphs = {}
def add_edge(
start: str,
@@ -463,13 +515,8 @@ class CompiledGraph(Pregel):
metadata["__interrupt"] = "before"
elif key in self.interrupt_after_nodes:
metadata["__interrupt"] = "after"
if xray and key in subgraphs:
subgraph = subgraphs[key].get_graph(
config=config,
xray=xray - 1
if isinstance(xray, int) and not isinstance(xray, bool) and xray > 0
else xray,
)
if key in subgraphs:
subgraph = subgraphs[key]
subgraph.trim_first_node()
subgraph.trim_last_node()
if len(subgraph.nodes) >= 1:
+1 -1
View File
@@ -416,7 +416,7 @@ class StateGraph(Graph):
and (vals := get_args(rargs[0]))
):
ends = vals
except (TypeError, StopIteration):
except (NameError, TypeError, StopIteration):
pass
if destinations is not None:
+24 -5
View File
@@ -1,4 +1,3 @@
import functools
import itertools
import sys
from collections import defaultdict, deque
@@ -507,6 +506,7 @@ def prepare_single_task(
CONFIG_KEY_CHECKPOINT_ID: None,
CONFIG_KEY_CHECKPOINT_NS: task_checkpoint_ns,
CONFIG_KEY_SCRATCHPAD: _scratchpad(
config,
pending_writes,
task_id,
),
@@ -616,6 +616,7 @@ def prepare_single_task(
CONFIG_KEY_CHECKPOINT_ID: None,
CONFIG_KEY_CHECKPOINT_NS: task_checkpoint_ns,
CONFIG_KEY_SCRATCHPAD: _scratchpad(
config,
pending_writes,
task_id,
),
@@ -741,6 +742,7 @@ def prepare_single_task(
CONFIG_KEY_CHECKPOINT_ID: None,
CONFIG_KEY_CHECKPOINT_NS: task_checkpoint_ns,
CONFIG_KEY_SCRATCHPAD: _scratchpad(
config,
pending_writes,
task_id,
),
@@ -762,12 +764,32 @@ def prepare_single_task(
def _scratchpad(
config: RunnableConfig,
pending_writes: list[PendingWrite],
task_id: str,
) -> PregelScratchpad:
# None cannot be used as a resume value, because it would be difficult to
# distinguish from missing when used over http
null_resume_write = next(
(w for w in pending_writes if w[0] == NULL_TASK_ID and w[1] == RESUME), None
)
parent_scratchpad: Optional[PregelScratchpad] = config[CONF].get(
CONFIG_KEY_SCRATCHPAD
)
def get_null_resume(consume: bool = False) -> Any:
if null_resume_write is None:
if parent_scratchpad is not None:
return parent_scratchpad.get_null_resume(consume)
return None
if consume:
try:
pending_writes.remove(null_resume_write)
return null_resume_write[2]
except ValueError:
return None
return null_resume_write[2]
# using itertools.count as an atomic counter (+= 1 is not thread-safe)
return PregelScratchpad(
# call
@@ -777,10 +799,7 @@ def _scratchpad(
resume=next(
(w[2] for w in pending_writes if w[0] == task_id and w[1] == RESUME), []
),
null_resume=null_resume_write[2] if null_resume_write is not None else None,
_consume_null_resume=functools.partial(pending_writes.remove, null_resume_write)
if null_resume_write is not None
else lambda: None,
get_null_resume=get_null_resume,
# subgraph
subgraph_counter=itertools.count(0).__next__,
)
+8 -2
View File
@@ -137,7 +137,12 @@ def map_debug_task_results(
"result": [
w for w in writes if w[0] in stream_channels_list or w[0] == RETURN
],
"interrupts": [asdict(w[1]) for w in writes if w[0] == INTERRUPT],
"interrupts": [
asdict(v)
for w in writes
if w[0] == INTERRUPT
for v in (w[1] if isinstance(w[1], Sequence) else [w[1]])
],
},
}
@@ -293,8 +298,9 @@ def tasks_w_writes(
),
tuple(
v
for tid, n, v in pending_writes
for tid, n, vv in pending_writes
if tid == task.id and n == INTERRUPT
for v in (vv if isinstance(vv, Sequence) else [vv])
),
states.get(task.id) if states else None,
(
+1 -1
View File
@@ -28,7 +28,7 @@ def is_task_id(task_id: str) -> bool:
"""Check if a string is a valid task id."""
try:
UUID(task_id)
except ValueError:
except Exception:
return False
return True
+27 -15
View File
@@ -587,15 +587,6 @@ class PregelLoop(LoopProtocol):
)
)
# take resume value from parent
if scratchpad := cast(
Optional[PregelScratchpad], configurable.get(CONFIG_KEY_SCRATCHPAD)
):
if (
isinstance(scratchpad, PregelScratchpad)
and scratchpad.null_resume is not None
):
self.put_writes(NULL_TASK_ID, [(RESUME, scratchpad.null_resume)])
# map command to writes
if isinstance(self.input, Command):
if self.input.resume is not None and not self.checkpointer:
@@ -794,11 +785,14 @@ class PregelLoop(LoopProtocol):
[w for t in self.tasks.values() for w in t.writes],
self.channels,
)
# emit INTERRUPT event
self._emit(
"updates",
lambda: iter([{INTERRUPT: cast(GraphInterrupt, exc_value).args[0]}]),
)
# emit INTERRUPT if exception is empty (otherwise emitted by put_writes)
if exc_value is not None and (not exc_value.args or not exc_value.args[0]):
self._emit(
"updates",
lambda: iter(
[{INTERRUPT: cast(GraphInterrupt, exc_value).args[0]}]
),
)
# save final output
self.output = read_channels(self.channels, self.output_keys)
# suppress interrupt
@@ -829,7 +823,25 @@ class PregelLoop(LoopProtocol):
"tags", EMPTY_SEQ
):
return
if writes[0][0] != ERROR and writes[0][0] != INTERRUPT:
if writes[0][0] == INTERRUPT:
self._emit(
"updates",
lambda: iter(
[
{
INTERRUPT: tuple(
v
for w in writes
if w[0] == INTERRUPT
for v in (
w[1] if isinstance(w[1], Sequence) else (w[1],)
)
)
}
]
),
)
elif writes[0][0] != ERROR:
self._emit(
"updates",
map_output_updates,
+13 -4
View File
@@ -543,10 +543,11 @@ class PregelRunner:
elif exception:
if isinstance(exception, GraphInterrupt):
# save interrupt to checkpointer
if interrupts := [(INTERRUPT, i) for i in exception.args[0]]:
if exception.args[0]:
writes = [(INTERRUPT, exception.args[0])]
if resumes := [w for w in task.writes if w[0] == RESUME]:
interrupts.extend(resumes)
self.put_writes(task.id, interrupts)
writes.extend(resumes)
self.put_writes(task.id, writes)
elif isinstance(exception, GraphBubbleUp):
raise exception
else:
@@ -608,6 +609,7 @@ def _panic_or_proceed(
done.add(fut)
else:
inflight.add(fut)
interrupts: list[GraphInterrupt] = []
while done:
# if any task failed
if exc := _exception(done.pop()):
@@ -616,7 +618,14 @@ def _panic_or_proceed(
inflight.pop().cancel()
# raise the exception
if panic:
raise exc
if isinstance(exc, GraphInterrupt):
# collect interrupts
interrupts.append(exc)
else:
raise exc
# raise combined interrupts
if interrupts:
raise GraphInterrupt(tuple(i for exc in interrupts for i in exc.args[0]))
if inflight:
# if we got here means we timed out
while inflight:
+4 -13
View File
@@ -130,7 +130,7 @@ class Interrupt:
value: Any
resumable: bool = False
ns: Optional[Sequence[str]] = None
when: Literal["during"] = "during"
when: Literal["during"] = dataclasses.field(default="during", repr=False)
class PregelTask(NamedTuple):
@@ -351,20 +351,11 @@ class PregelScratchpad:
call_counter: Callable[[], int]
# interrupt
interrupt_counter: Callable[[], int]
get_null_resume: Callable[[bool], Any]
resume: list[Any]
null_resume: Optional[Any]
_consume_null_resume: Callable[[], None]
# subgraph
subgraph_counter: Callable[[], int]
def consume_null_resume(self) -> Any:
if self.null_resume is not None:
value = self.null_resume
self._consume_null_resume()
self.null_resume = None
return value
raise ValueError("No null resume to consume")
def interrupt(value: Any) -> Any:
"""Interrupt the graph with a resumable exception from within a node.
@@ -480,9 +471,9 @@ def interrupt(value: Any) -> Any:
if idx < len(scratchpad.resume):
return scratchpad.resume[idx]
# find current resume value
if scratchpad.null_resume is not None:
v = scratchpad.get_null_resume(True)
if v is not None:
assert len(scratchpad.resume) == idx, (scratchpad.resume, idx)
v = scratchpad.consume_null_resume()
scratchpad.resume.append(v)
conf[CONFIG_KEY_SEND]([(RESUME, scratchpad.resume)])
return v
+44 -2
View File
@@ -1,4 +1,4 @@
# This file is automatically @generated by Poetry 2.0.1 and should not be changed by hand.
# This file is automatically @generated by Poetry 2.0.0 and should not be changed by hand.
[[package]]
name = "aiosqlite"
@@ -2238,6 +2238,48 @@ files = [
{file = "pycparser-2.22.tar.gz", hash = "sha256:491c8be9c040f5390f5bf44a5b07752bd07f56edf992381b05c701439eec10f6"},
]
[[package]]
name = "pycryptodome"
version = "3.21.0"
description = "Cryptographic library for Python"
optional = false
python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,>=2.7"
groups = ["dev"]
files = [
{file = "pycryptodome-3.21.0-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:dad9bf36eda068e89059d1f07408e397856be9511d7113ea4b586642a429a4fd"},
{file = "pycryptodome-3.21.0-cp27-cp27m-manylinux2010_i686.whl", hash = "sha256:a1752eca64c60852f38bb29e2c86fca30d7672c024128ef5d70cc15868fa10f4"},
{file = "pycryptodome-3.21.0-cp27-cp27m-manylinux2010_x86_64.whl", hash = "sha256:3ba4cc304eac4d4d458f508d4955a88ba25026890e8abff9b60404f76a62c55e"},
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{file = "pycryptodome-3.21.0.tar.gz", hash = "sha256:f7787e0d469bdae763b876174cf2e6c0f7be79808af26b1da96f1a64bcf47297"},
]
[[package]]
name = "pydantic"
version = "2.9.2"
@@ -3509,4 +3551,4 @@ type = ["pytest-mypy"]
[metadata]
lock-version = "2.1"
python-versions = ">=3.9.0,<4.0"
content-hash = "eb85f0bcc0e8a715ef38afb58cf888f7c2ee8579ea6ed94900244365f24cddd9"
content-hash = "b8641a0b2d92bee0363602e69f99b23366b2035b7e17ff017708194e6fbd0ac5"
+2 -1
View File
@@ -1,6 +1,6 @@
[tool.poetry]
name = "langgraph"
version = "0.3.10"
version = "0.3.14"
description = "Building stateful, multi-actor applications with LLMs"
authors = []
license = "MIT"
@@ -37,6 +37,7 @@ uvloop = "0.21.0beta1"
pyperf = "^2.7.0"
py-spy = "^0.3.14"
types-requests = "^2.32.0.20240914"
pycryptodome = "^3.21.0"
[tool.ruff]
lint.select = [ "E", "F", "I", "TID251" ]
File diff suppressed because one or more lines are too long
@@ -377,6 +377,19 @@
'''
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge[sqlite_aes]
'''
graph TD;
__start__ --> rewrite_query;
analyzer_one --> retriever_one;
qa --> __end__;
retriever_one --> qa;
retriever_two --> qa;
rewrite_query --> analyzer_one;
rewrite_query --> retriever_two;
'''
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic1[memory]
'''
graph TD;
@@ -797,6 +810,76 @@
'type': 'object',
})
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic1[sqlite_aes]
'''
graph TD;
__start__ --> rewrite_query;
analyzer_one --> retriever_one;
qa --> __end__;
retriever_one --> qa;
retriever_two --> qa;
rewrite_query --> analyzer_one;
rewrite_query -.-> retriever_two;
'''
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic1[sqlite_aes].1
dict({
'definitions': dict({
'InnerObject': dict({
'properties': dict({
'yo': dict({
'title': 'Yo',
'type': 'integer',
}),
}),
'required': list([
'yo',
]),
'title': 'InnerObject',
'type': 'object',
}),
}),
'properties': dict({
'inner': dict({
'$ref': '#/definitions/InnerObject',
}),
'query': dict({
'title': 'Query',
'type': 'string',
}),
}),
'required': list([
'query',
'inner',
]),
'title': 'Input',
'type': 'object',
})
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic1[sqlite_aes].2
dict({
'properties': dict({
'answer': dict({
'title': 'Answer',
'type': 'string',
}),
'docs': dict({
'items': dict({
'type': 'string',
}),
'title': 'Docs',
'type': 'array',
}),
}),
'required': list([
'answer',
'docs',
]),
'title': 'Output',
'type': 'object',
})
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic2[memory]
'''
graph TD;
@@ -1217,6 +1300,76 @@
'type': 'object',
})
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic2[sqlite_aes]
'''
graph TD;
__start__ --> rewrite_query;
analyzer_one --> retriever_one;
qa --> __end__;
retriever_one --> qa;
retriever_two --> qa;
rewrite_query --> analyzer_one;
rewrite_query -.-> retriever_two;
'''
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic2[sqlite_aes].1
dict({
'$defs': dict({
'InnerObject': dict({
'properties': dict({
'yo': dict({
'title': 'Yo',
'type': 'integer',
}),
}),
'required': list([
'yo',
]),
'title': 'InnerObject',
'type': 'object',
}),
}),
'properties': dict({
'inner': dict({
'$ref': '#/$defs/InnerObject',
}),
'query': dict({
'title': 'Query',
'type': 'string',
}),
}),
'required': list([
'query',
'inner',
]),
'title': 'Input',
'type': 'object',
})
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic2[sqlite_aes].2
dict({
'properties': dict({
'answer': dict({
'title': 'Answer',
'type': 'string',
}),
'docs': dict({
'items': dict({
'type': 'string',
}),
'title': 'Docs',
'type': 'array',
}),
}),
'required': list([
'answer',
'docs',
]),
'title': 'Output',
'type': 'object',
})
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_custom_state_class_pydantic_input[memory]
'''
graph TD;
@@ -1715,6 +1868,19 @@
'''
# ---
# name: test_in_one_fan_out_state_graph_waiting_edge_via_branch[sqlite_aes]
'''
graph TD;
__start__ --> rewrite_query;
analyzer_one --> retriever_one;
qa --> __end__;
retriever_one --> qa;
retriever_two --> qa;
rewrite_query --> analyzer_one;
rewrite_query -.-> retriever_two;
'''
# ---
# name: test_multiple_sinks_subgraphs
'''
%%{init: {'flowchart': {'curve': 'linear'}}}%%
+11
View File
@@ -16,6 +16,7 @@ from langgraph.checkpoint.postgres.aio import (
AsyncPostgresSaver,
AsyncShallowPostgresSaver,
)
from langgraph.checkpoint.serde.encrypted import EncryptedSerializer
from langgraph.checkpoint.sqlite import SqliteSaver
from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
from langgraph.store.base import BaseStore
@@ -61,6 +62,15 @@ def checkpointer_sqlite():
yield checkpointer
@pytest.fixture(scope="function")
def checkpointer_sqlite_aes():
with SqliteSaver.from_conn_string(":memory:") as checkpointer:
checkpointer.serde = EncryptedSerializer.from_pycryptodome_aes(
key=b"1234567890123456"
)
yield checkpointer
@asynccontextmanager
async def _checkpointer_sqlite_aio():
async with AsyncSqliteSaver.from_conn_string(":memory:") as checkpointer:
@@ -437,6 +447,7 @@ REGULAR_CHECKPOINTERS_SYNC = [
"postgres",
"postgres_pipe",
"postgres_pool",
"sqlite_aes",
]
ALL_CHECKPOINTERS_SYNC = [
*REGULAR_CHECKPOINTERS_SYNC,
+294
View File
@@ -7317,3 +7317,297 @@ def test_empty_invoke() -> None:
"111": 111,
"222": 222,
}
@pytest.mark.parametrize("checkpointer_name", ALL_CHECKPOINTERS_SYNC)
def test_parallel_interrupts(
request: pytest.FixtureRequest, checkpointer_name: str
) -> None:
from pydantic import BaseModel, Field
checkpointer = request.getfixturevalue(f"checkpointer_{checkpointer_name}")
# --- CHILD GRAPH ---
class ChildState(BaseModel):
prompt: str = Field(..., description="What is going to be asked to the user?")
human_input: Optional[str] = Field(None, description="What the human said")
human_inputs: Annotated[List[str], operator.add] = Field(
default_factory=list, description="All of my messages"
)
def get_human_input(state: ChildState):
human_input = interrupt(state.prompt)
return dict(
human_input=human_input, # update child state
human_inputs=[human_input], # update parent state
)
child_graph_builder = StateGraph(ChildState)
child_graph_builder.add_node("get_human_input", get_human_input)
child_graph_builder.add_edge(START, "get_human_input")
child_graph_builder.add_edge("get_human_input", END)
child_graph = child_graph_builder.compile()
# --- PARENT GRAPH ---
class ParentState(BaseModel):
prompts: List[str] = Field(
..., description="What is going to be asked to the user?"
)
human_inputs: Annotated[List[str], operator.add] = Field(
default_factory=list, description="All of my messages"
)
def assign_workers(state: ParentState):
return [
Send(
"child_graph",
dict(
prompt=prompt,
),
)
for prompt in state.prompts
]
def cleanup(state: ParentState):
assert len(state.human_inputs) == len(state.prompts)
parent_graph_builder = StateGraph(ParentState)
parent_graph_builder.add_node("child_graph", child_graph)
parent_graph_builder.add_node("cleanup", cleanup)
parent_graph_builder.add_conditional_edges(START, assign_workers, ["child_graph"])
parent_graph_builder.add_edge("child_graph", "cleanup")
parent_graph_builder.add_edge("cleanup", END)
parent_graph = parent_graph_builder.compile(checkpointer=checkpointer)
# --- CLIENT INVOCATION ---
thread_config = dict(
configurable=dict(
thread_id=str(uuid.uuid4()),
)
)
current_input = dict(
prompts=["a", "b"],
)
invokes = 0
events: dict[int, list[dict]] = {}
while invokes < 10:
# reset interrupt
invokes += 1
events[invokes] = []
current_interrupts: list[Interrupt] = []
# start / resume the graph
for event in parent_graph.stream(
input=current_input,
config=thread_config,
stream_mode="updates",
):
events[invokes].append(event)
# handle the interrupt
if "__interrupt__" in event:
current_interrupts.extend(event["__interrupt__"])
# assume that it breaks here, because it is an interrupt
# get human input and resume
if any(i.resumable for i in current_interrupts):
current_input = Command(resume=f"Resume #{invokes}")
# not more human input required, must be completed
else:
break
else:
assert False, "Detected infinite loop"
assert invokes == 3
assert len(events) == 3
assert events[1] == UnsortedSequence(
{
"__interrupt__": (
Interrupt(
value="a",
resumable=True,
ns=[
AnyStr("child_graph:"),
AnyStr("get_human_input:"),
],
),
)
},
{
"__interrupt__": (
Interrupt(
value="b",
resumable=True,
ns=[
AnyStr("child_graph:"),
AnyStr("get_human_input:"),
],
),
)
},
)
assert events[2] in (
UnsortedSequence(
{
"__interrupt__": (
Interrupt(
value="a",
resumable=True,
ns=[
AnyStr("child_graph:"),
AnyStr("get_human_input:"),
],
),
)
},
{"child_graph": {"human_inputs": ["Resume #1"]}},
),
UnsortedSequence(
{
"__interrupt__": (
Interrupt(
value="b",
resumable=True,
ns=[
AnyStr("child_graph:"),
AnyStr("get_human_input:"),
],
),
)
},
{"child_graph": {"human_inputs": ["Resume #1"]}},
),
)
assert events[3] == UnsortedSequence(
{
"child_graph": {"human_inputs": ["Resume #1"]},
"__metadata__": {"cached": True},
},
{"child_graph": {"human_inputs": ["Resume #2"]}},
{"cleanup": None},
)
@pytest.mark.parametrize("checkpointer_name", ALL_CHECKPOINTERS_SYNC)
def test_parallel_interrupts_double(
request: pytest.FixtureRequest, checkpointer_name: str
) -> None:
from pydantic import BaseModel, Field
checkpointer = request.getfixturevalue(f"checkpointer_{checkpointer_name}")
# --- CHILD GRAPH ---
class ChildState(BaseModel):
prompt: str = Field(..., description="What is going to be asked to the user?")
human_input: Optional[str] = Field(None, description="What the human said")
human_inputs: Annotated[List[str], operator.add] = Field(
default_factory=list, description="All of my messages"
)
def get_human_input(state: ChildState):
human_input = interrupt(state.prompt)
return dict(
human_inputs=[human_input], # update parent state
)
def get_dolphin_input(state: ChildState):
human_input = interrupt(state.prompt)
return dict(
human_inputs=[human_input], # update parent state
)
child_graph_builder = StateGraph(ChildState)
child_graph_builder.add_node("get_human_input", get_human_input)
child_graph_builder.add_node("get_dolphin_input", get_dolphin_input)
child_graph_builder.add_edge(START, "get_human_input")
child_graph_builder.add_edge(START, "get_dolphin_input")
child_graph = child_graph_builder.compile()
# --- PARENT GRAPH ---
class ParentState(BaseModel):
prompts: List[str] = Field(
..., description="What is going to be asked to the user?"
)
human_inputs: Annotated[List[str], operator.add] = Field(
default_factory=list, description="All of my messages"
)
def assign_workers(state: ParentState):
return [
Send(
"child_graph",
dict(
prompt=prompt,
),
)
for prompt in state.prompts
]
def cleanup(state: ParentState):
assert len(state.human_inputs) == len(state.prompts) * 2
parent_graph_builder = StateGraph(ParentState)
parent_graph_builder.add_node("child_graph", child_graph)
parent_graph_builder.add_node("cleanup", cleanup)
parent_graph_builder.add_conditional_edges(START, assign_workers, ["child_graph"])
parent_graph_builder.add_edge("child_graph", "cleanup")
parent_graph_builder.add_edge("cleanup", END)
parent_graph = parent_graph_builder.compile(checkpointer=checkpointer)
# --- CLIENT INVOCATION ---
thread_config = dict(
configurable=dict(
thread_id=str(uuid.uuid4()),
)
)
current_input = dict(
prompts=["a", "b"],
)
invokes = 0
events: dict[int, list[dict]] = {}
while invokes < 10:
# reset interrupt
invokes += 1
events[invokes] = []
current_interrupts: list[Interrupt] = []
# start / resume the graph
for event in parent_graph.stream(
input=current_input,
config=thread_config,
stream_mode="updates",
):
events[invokes].append(event)
# handle the interrupt
if "__interrupt__" in event:
current_interrupts.extend(event["__interrupt__"])
# assume that it breaks here, because it is an interrupt
# get human input and resume
if any(i.resumable for i in current_interrupts):
current_input = Command(resume=f"Resume #{invokes}")
# not more human input required, must be completed
else:
break
else:
assert False, "Detected infinite loop"
assert invokes == 5
assert len(events) == 5
+5 -5
View File
@@ -938,10 +938,7 @@ async def test_copy_checkpoint(checkpointer_name: str) -> None:
async for c in tool_two.astream(
{"my_key": "value ⛰️", "market": "DE"}, thread2
)
] == [
{
"tool_one": {"my_key": " one"},
},
] == UnsortedSequence(
{
"__interrupt__": (
Interrupt(
@@ -951,7 +948,10 @@ async def test_copy_checkpoint(checkpointer_name: str) -> None:
),
)
},
]
{
"tool_one": {"my_key": " one"},
},
)
# resume with answer
assert [
c async for c in tool_two.astream(Command(resume=" my answer"), thread2)
+6 -6
View File
@@ -202,7 +202,7 @@ async def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": None,
@@ -275,7 +275,7 @@ async def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": c.config["configurable"]["checkpoint_id"],
@@ -378,7 +378,7 @@ async def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": c.config["configurable"]["checkpoint_id"],
@@ -491,7 +491,7 @@ async def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": None,
@@ -559,7 +559,7 @@ async def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": c.config["configurable"]["checkpoint_id"],
@@ -683,7 +683,7 @@ async def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": c.config["configurable"]["checkpoint_id"],
@@ -201,7 +201,7 @@ def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": None,
@@ -274,7 +274,7 @@ def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": c.config["configurable"]["checkpoint_id"],
@@ -377,7 +377,7 @@ def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": c.config["configurable"]["checkpoint_id"],
@@ -489,7 +489,7 @@ def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": None,
@@ -557,7 +557,7 @@ def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": c.config["configurable"]["checkpoint_id"],
@@ -681,7 +681,7 @@ def test_subgraph_w_interrupt(
"subgraph_counter": None,
"call_counter": None,
"interrupt_counter": None,
"null_resume": None,
"get_null_resume": None,
"resume": [],
},
"checkpoint_id": c.config["configurable"]["checkpoint_id"],