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47 lines
1.6 KiB
Python
47 lines
1.6 KiB
Python
"""Loader that uses unstructured to load files."""
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from typing import List
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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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class UnstructuredFileLoader(BaseLoader):
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"""Loader that uses unstructured to load files."""
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def __init__(self, file_path: str, mode: str = "single"):
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"""Initialize with file path."""
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try:
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import unstructured # noqa:F401
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except ImportError:
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raise ValueError(
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"unstructured package not found, please install it with "
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"`pip install unstructured`"
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)
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_valid_modes = {"single", "elements"}
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if mode not in _valid_modes:
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raise ValueError(
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f"Got {mode} for `mode`, but should be one of `{_valid_modes}`"
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)
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self.file_path = file_path
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self.mode = mode
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def _get_elements(self) -> List:
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from unstructured.partition.auto import partition
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return partition(filename=self.file_path)
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def load(self) -> List[Document]:
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"""Load file."""
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elements = self._get_elements()
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metadata = {"source": self.file_path}
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if self.mode == "elements":
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docs = [
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Document(page_content=str(el), metadata=metadata) for el in elements
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]
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elif self.mode == "single":
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text = "\n\n".join([str(el) for el in elements])
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docs = [Document(page_content=text, metadata=metadata)]
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else:
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raise ValueError(f"mode of {self.mode} not supported.")
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return docs
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