langchain.storage.file_system.LocalFileStore¶
- class langchain.storage.file_system.LocalFileStore(root_path: Union[str, Path])[source]¶
BaseStore interface that works on the local file system.
Examples
Create a LocalFileStore instance and perform operations on it:
from langchain.storage import LocalFileStore # Instantiate the LocalFileStore with the root path file_store = LocalFileStore("/path/to/root") # Set values for keys file_store.mset([("key1", b"value1"), ("key2", b"value2")]) # Get values for keys values = file_store.mget(["key1", "key2"]) # Returns [b"value1", b"value2"] # Delete keys file_store.mdelete(["key1"]) # Iterate over keys for key in file_store.yield_keys(): print(key)
Implement the BaseStore interface for the local file system.
- Parameters
root_path (Union[str, Path]) – The root path of the file store. All keys are interpreted as paths relative to this root.
Methods
__init__(root_path)Implement the BaseStore interface for the local file system.
mdelete(keys)Delete the given keys and their associated values.
mget(keys)Get the values associated with the given keys.
mset(key_value_pairs)Set the values for the given keys.
yield_keys([prefix])Get an iterator over keys that match the given prefix.
- __init__(root_path: Union[str, Path]) None[source]¶
Implement the BaseStore interface for the local file system.
- Parameters
root_path (Union[str, Path]) – The root path of the file store. All keys are interpreted as paths relative to this root.
- mdelete(keys: Sequence[str]) None[source]¶
Delete the given keys and their associated values.
- Parameters
keys (Sequence[str]) – A sequence of keys to delete.
- Returns
None
- mget(keys: Sequence[str]) List[Optional[bytes]][source]¶
Get the values associated with the given keys.
- Parameters
keys – A sequence of keys.
- Returns
A sequence of optional values associated with the keys. If a key is not found, the corresponding value will be None.