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106 lines
3.3 KiB
Python
106 lines
3.3 KiB
Python
"""Loading logic for loading documents from a directory."""
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import logging
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from pathlib import Path
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from typing import List, Type, Union
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from tqdm.contrib.concurrent import process_map
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from langchain.docstore.document import Document
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from langchain.document_loaders.base import BaseLoader
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from langchain.document_loaders.html_bs import BSHTMLLoader
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from langchain.document_loaders.text import TextLoader
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from langchain.document_loaders.unstructured import UnstructuredFileLoader
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FILE_LOADER_TYPE = Union[Type[UnstructuredFileLoader], Type[TextLoader],
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Type[BSHTMLLoader]]
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logger = logging.getLogger(__name__)
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def _is_visible(p: Path) -> bool:
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parts = p.parts
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for _p in parts:
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if _p.startswith("."):
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return False
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return True
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class DirectoryLoader(BaseLoader):
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"""Loading logic for loading documents from a directory."""
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def __init__(
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self,
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path: str,
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glob: str = "**/[!.]*",
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silent_errors: bool = False,
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load_hidden: bool = False,
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loader_cls: FILE_LOADER_TYPE = UnstructuredFileLoader,
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loader_kwargs: Union[dict, None] = None,
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recursive: bool = False,
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show_progress: bool = False,
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parallel: bool = False,
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):
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"""Initialize with path to directory and how to glob over it."""
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if loader_kwargs is None:
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loader_kwargs = {}
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self.path = path
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self.glob = glob
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self.load_hidden = load_hidden
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self.loader_cls = loader_cls
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self.loader_kwargs = loader_kwargs
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self.silent_errors = silent_errors
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self.recursive = recursive
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self.show_progress = show_progress
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self.parallel = parallel
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def _load_file(self, p: Path) -> List[Document]:
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if p.is_file():
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if _is_visible(p.relative_to(p)) or self.load_hidden:
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try:
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sub_docs = self.loader_cls(str(p),
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**self.loader_kwargs).load()
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return sub_docs
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except Exception as e:
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if self.silent_errors:
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logger.warning(e)
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else:
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raise e
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return []
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def load(self) -> List[Document]:
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"""Load documents."""
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p = Path(self.path)
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docs = []
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items = list(
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p.rglob(self.glob) if self.recursive else p.glob(self.glob))
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pbar = None
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if self.show_progress:
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try:
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from tqdm import tqdm
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pbar = tqdm(total=len(items))
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except ImportError as e:
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logger.warning(
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"To log the progress of DirectoryLoader you need to install tqdm, "
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"`pip install tqdm`")
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if self.silent_errors:
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logger.warning(e)
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else:
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raise e
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if self.parallel:
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results = process_map(self._load_file, items) # use default max_workers
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else:
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results = process_map(self._load_file, items, max_workers=1)
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# Combine the results
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for sub_docs in results:
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docs.extend(sub_docs)
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if pbar:
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pbar.update(1)
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if pbar:
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pbar.close()
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return docs
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