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53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
"""Loader that loads PDF 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 UnstructuredPDFLoader(BaseLoader):
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"""Loader that uses unstructured to load PDF files."""
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def __init__(self, file_path: str):
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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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self.file_path = file_path
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def load(self) -> List[Document]:
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"""Load file."""
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from unstructured.partition.pdf import partition_pdf
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elements = partition_pdf(filename=self.file_path)
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text = "\n\n".join([str(el) for el in elements])
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metadata = {"source": self.file_path}
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return [Document(page_content=text, metadata=metadata)]
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class PDFMinerLoader(BaseLoader):
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"""Loader that uses PDFMiner to load PDF files."""
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def __init__(self, file_path: str):
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"""Initialize with file path."""
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try:
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from pdfminer.high_level import extract_text # noqa:F401
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except ImportError:
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raise ValueError(
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"pdfminer package not found, please install it with "
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"`pip install pdfminer.six`"
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)
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self.file_path = file_path
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def load(self) -> List[Document]:
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"""Load file."""
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from pdfminer.high_level import extract_text
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text = extract_text(self.file_path)
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metadata = {"source": self.file_path}
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return [Document(page_content=text, metadata=metadata)]
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