mirror of
https://github.com/hwchase17/langchain
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4cb5f4c353
This PR should make it easier for linters to do type checking and for IDEs to jump to definition of code. See #20050 as a template for this PR. - As a byproduct: Added 3 missed `test_imports`. - Added missed `SolarChat` in to __init___.py Added it into test_import ut. - Added `# type: ignore` to fix linting. It is not clear, why linting errors appear after ^ changes. --------- Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
91 lines
3.3 KiB
Python
91 lines
3.3 KiB
Python
from __future__ import annotations
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import concurrent.futures
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from pathlib import Path
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from typing import Iterator, Literal, Optional, Sequence, Union
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from langchain_core.documents import Document
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from langchain_community.document_loaders.base import BaseBlobParser
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from langchain_community.document_loaders.blob_loaders import (
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BlobLoader,
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FileSystemBlobLoader,
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)
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from langchain_community.document_loaders.generic import GenericLoader
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from langchain_community.document_loaders.parsers.registry import get_parser
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_PathLike = Union[str, Path]
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DEFAULT = Literal["default"]
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class ConcurrentLoader(GenericLoader):
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"""Load and pars Documents concurrently."""
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def __init__(
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self,
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blob_loader: BlobLoader, # type: ignore[valid-type]
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blob_parser: BaseBlobParser,
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num_workers: int = 4, # type: ignore[valid-type]
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) -> None:
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super().__init__(blob_loader, blob_parser)
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self.num_workers = num_workers
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def lazy_load(
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self,
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) -> Iterator[Document]:
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"""Load documents lazily with concurrent parsing."""
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with concurrent.futures.ThreadPoolExecutor(
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max_workers=self.num_workers
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) as executor:
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futures = {
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executor.submit(self.blob_parser.lazy_parse, blob)
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for blob in self.blob_loader.yield_blobs() # type: ignore[attr-defined]
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}
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for future in concurrent.futures.as_completed(futures):
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yield from future.result()
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@classmethod
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def from_filesystem(
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cls,
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path: _PathLike,
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*,
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glob: str = "**/[!.]*",
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exclude: Sequence[str] = (),
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suffixes: Optional[Sequence[str]] = None,
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show_progress: bool = False,
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parser: Union[DEFAULT, BaseBlobParser] = "default",
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num_workers: int = 4,
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parser_kwargs: Optional[dict] = None,
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) -> ConcurrentLoader:
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"""Create a concurrent generic document loader using a filesystem blob loader.
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Args:
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path: The path to the directory to load documents from.
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glob: The glob pattern to use to find documents.
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suffixes: The suffixes to use to filter documents. If None, all files
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matching the glob will be loaded.
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exclude: A list of patterns to exclude from the loader.
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show_progress: Whether to show a progress bar or not (requires tqdm).
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Proxies to the file system loader.
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parser: A blob parser which knows how to parse blobs into documents
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num_workers: Max number of concurrent workers to use.
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parser_kwargs: Keyword arguments to pass to the parser.
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"""
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blob_loader = FileSystemBlobLoader( # type: ignore[attr-defined, misc]
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path,
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glob=glob,
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exclude=exclude,
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suffixes=suffixes,
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show_progress=show_progress,
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)
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if isinstance(parser, str):
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if parser == "default" and cls.get_parser != GenericLoader.get_parser:
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# There is an implementation of get_parser on the class, use it.
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blob_parser = cls.get_parser(**(parser_kwargs or {}))
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else:
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blob_parser = get_parser(parser)
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else:
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blob_parser = parser
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return cls(blob_loader, blob_parser, num_workers=num_workers)
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