PDFPlumberParser error: 'list' object has no attribute "name"

[ZaraP-NSTARX]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

from langchain_community.document_loaders import PDFPlumberLoader
from PIL import ImageFile
import pickle

Configuring Libraries

ImageFile.LOAD_TRUNCATED_IMAGES = True

Main Program Code

files = ["./docs/cayenne.pdf",
"./docs/cullinan.pdf",
"./docs/aventador.pdf",
"./docs/performante.pdf"]

loaders = []
for file in files:
loaders.append(PDFPlumberLoader(file, extract_images = True))

docs = []
for loader in loaders:
docs.extend(loader.load())

with open("./docs_processed/pdfplumber_docs.txt", "wb") as file:
pickle.dump(docs, file)

Error Message and Stack Trace (if applicable)

Traceback (most recent call last):
File "/home/work/Local Work Files/langchain-doc-loaders/process_docs.py", line 21, in
docs.extend(loader.load())
^^^^^^^^^^^^^
File "/home/work/.pyenv/versions/docloader-venv/lib/python3.12/site-packages/langchain_community/document_loaders/pdf.py", line 644, in load
return parser.parse(blob)
^^^^^^^^^^^^^^^^^^
File "/home/work/.pyenv/versions/docloader-venv/lib/python3.12/site-packages/langchain_core/document_loaders/base.py", line 126, in parse
return list(self.lazy_parse(blob))
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/work/.pyenv/versions/docloader-venv/lib/python3.12/site-packages/langchain_community/document_loaders/parsers/pdf.py", line 397, in lazy_parse
+ self._extract_images_from_page(page),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/work/.pyenv/versions/docloader-venv/lib/python3.12/site-packages/langchain_community/document_loaders/parsers/pdf.py", line 428, in _extract_images_from_page
if img["stream"]["Filter"].name in _PDF_FILTER_WITHOUT_LOSS:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'list' object has no attribute 'name'

Description

I'm using the PDF Plumber LangChain implementation to extract image information from a set of car brochure PDFs. The error is located in the langchain_community/document_loaders/parsers/pdf.py file on line 428.

I was able to fix this issue by deleting ".name" from the conditional on line 428. I'm opening this issue so I can create a PR with the fix.

System Info

System Information

OS: Linux
OS Version: #1 SMP PREEMPT_DYNAMIC Thu, 12 Sep 2024 17:21:02 +0000
Python Version: 3.12.6 (main, Sep 8 2024, 13:18:56) [GCC 14.2.1 20240805]

Package Information

langchain_core: 0.2.40
langchain: 0.3.0
langchain_community: 0.3.0
langsmith: 0.1.120
langchain_text_splitters: 0.3.0
langchain_unstructured: 0.1.2

Optional packages not installed

langgraph
langserve

Other Dependencies

aiohttp: 3.10.5
async-timeout: Installed. No version info available.
dataclasses-json: 0.6.7
httpx: 0.27.2
jsonpatch: 1.33
numpy: 1.26.4
orjson: 3.10.7
packaging: 24.1
pydantic: 2.9.1
pydantic-settings: 2.5.2
PyYAML: 6.0.2
requests: 2.32.3
SQLAlchemy: 2.0.34
tenacity: 8.5.0
typing-extensions: 4.12.2
unstructured-client: 0.24.1
unstructured[all-docs]: Installed. No version info available.