forked from Archives/langchain
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
3.7 KiB
Python
103 lines
3.7 KiB
Python
"""Loader that loads word documents."""
|
|
import os
|
|
import tempfile
|
|
from abc import ABC
|
|
from typing import List
|
|
from urllib.parse import urlparse
|
|
|
|
import requests
|
|
|
|
from langchain.docstore.document import Document
|
|
from langchain.document_loaders.base import BaseLoader
|
|
from langchain.document_loaders.unstructured import UnstructuredFileLoader
|
|
|
|
|
|
class Docx2txtLoader(BaseLoader, ABC):
|
|
"""Loads a DOCX with docx2txt and chunks at character level.
|
|
|
|
Defaults to check for local file, but if the file is a web path, it will download it
|
|
to a temporary file, and use that, then clean up the temporary file after completion
|
|
"""
|
|
|
|
def __init__(self, file_path: str):
|
|
"""Initialize with file path."""
|
|
self.file_path = file_path
|
|
if "~" in self.file_path:
|
|
self.file_path = os.path.expanduser(self.file_path)
|
|
|
|
# If the file is a web path, download it to a temporary file, and use that
|
|
if not os.path.isfile(self.file_path) and self._is_valid_url(self.file_path):
|
|
r = requests.get(self.file_path)
|
|
|
|
if r.status_code != 200:
|
|
raise ValueError(
|
|
"Check the url of your file; returned status code %s"
|
|
% r.status_code
|
|
)
|
|
|
|
self.web_path = self.file_path
|
|
self.temp_file = tempfile.NamedTemporaryFile()
|
|
self.temp_file.write(r.content)
|
|
self.file_path = self.temp_file.name
|
|
elif not os.path.isfile(self.file_path):
|
|
raise ValueError("File path %s is not a valid file or url" % self.file_path)
|
|
|
|
def __del__(self) -> None:
|
|
if hasattr(self, "temp_file"):
|
|
self.temp_file.close()
|
|
|
|
def load(self) -> List[Document]:
|
|
"""Load given path as single page."""
|
|
import docx2txt
|
|
|
|
return [
|
|
Document(
|
|
page_content=docx2txt.process(self.file_path),
|
|
metadata={"source": self.file_path},
|
|
)
|
|
]
|
|
|
|
@staticmethod
|
|
def _is_valid_url(url: str) -> bool:
|
|
"""Check if the url is valid."""
|
|
parsed = urlparse(url)
|
|
return bool(parsed.netloc) and bool(parsed.scheme)
|
|
|
|
|
|
class UnstructuredWordDocumentLoader(UnstructuredFileLoader):
|
|
"""Loader that uses unstructured to load word documents."""
|
|
|
|
def _get_elements(self) -> List:
|
|
from unstructured.__version__ import __version__ as __unstructured_version__
|
|
from unstructured.file_utils.filetype import FileType, detect_filetype
|
|
|
|
unstructured_version = tuple(
|
|
[int(x) for x in __unstructured_version__.split(".")]
|
|
)
|
|
# NOTE(MthwRobinson) - magic will raise an import error if the libmagic
|
|
# system dependency isn't installed. If it's not installed, we'll just
|
|
# check the file extension
|
|
try:
|
|
import magic # noqa: F401
|
|
|
|
is_doc = detect_filetype(self.file_path) == FileType.DOC
|
|
except ImportError:
|
|
_, extension = os.path.splitext(self.file_path)
|
|
is_doc = extension == ".doc"
|
|
|
|
if is_doc and unstructured_version < (0, 4, 11):
|
|
raise ValueError(
|
|
f"You are on unstructured version {__unstructured_version__}. "
|
|
"Partitioning .doc files is only supported in unstructured>=0.4.11. "
|
|
"Please upgrade the unstructured package and try again."
|
|
)
|
|
|
|
if is_doc:
|
|
from unstructured.partition.doc import partition_doc
|
|
|
|
return partition_doc(filename=self.file_path, **self.unstructured_kwargs)
|
|
else:
|
|
from unstructured.partition.docx import partition_docx
|
|
|
|
return partition_docx(filename=self.file_path, **self.unstructured_kwargs)
|