WEBDIENSTE/langgraph
1
0
Fork 0
mirror of https://github.com/langchain-ai/langgraph.git synced 2026-09-25 19:15:11 +02:00
Code Issues Packages Projects Releases Wiki Activity

checkpoint-sqlite: new library for sqlite checkpointer implementation (#1203)

Browse Source 
* checkpoint-sqlite: new library for sqlite checkpointer implementation
This commit is contained in:
Vadym Barda
2024-08-02 22:14:12 +00:00
committed by GitHub
parent 16a6450534
commit c149a99b44
20 changed files with 1158 additions and 114 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libs/checkpoint-sqlite/README.md
+91
View File
@@ -0,0 +1,91 @@
# LangGraph SQLite Checkpoint
Implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via `aiosqlite`)
## Usage
```python
from langgraph.checkpoint.sqlite import SqliteSaver
checkpointer = SqliteSaver.from_conn_string(":memory:")
checkpoint = {
"v": 1,
"ts": "2024-07-31T20:14:19.804150+00:00",
"id": "1ef4f797-8335-6428-8001-8a1503f9b875",
"channel_values": {
"my_key": "meow",
"node": "node"
},
"channel_versions": {
"__start__": 2,
"my_key": 3,
"start:node": 3,
"node": 3
},
"versions_seen": {
"__input__": {},
"__start__": {
"__start__": 1
},
"node": {
"start:node": 2
}
},
"pending_sends": [],
"current_tasks": {}
}
# store checkpoint
checkpointer.put(thread_config, checkpoint, {})
# load checkpoint
checkpointer.get(thread_config)
# list checkpoints
list(checkpointer.list(thread_config))
```
### Async
```python
from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
checkpointer = AsyncSqliteSaver.from_conn_string(":memory:")
checkpoint = {
"v": 1,
"ts": "2024-07-31T20:14:19.804150+00:00",
"id": "1ef4f797-8335-6428-8001-8a1503f9b875",
"channel_values": {
"my_key": "meow",
"node": "node"
},
"channel_versions": {
"__start__": 2,
"my_key": 3,
"start:node": 3,
"node": 3
},
"versions_seen": {
"__input__": {},
"__start__": {
"__start__": 1
},
"node": {
"start:node": 2
}
},
"pending_sends": [],
"current_tasks": {}
}
# store checkpoint
await checkpointer.aput(thread_config, checkpoint, {})
# load checkpoint
await checkpointer.aget(thread_config)
# list checkpoints
[c async for c in checkpointer.alist(thread_config)]
```