PyPDFium2Loader

This notebook provides a quick overview for getting started with PyPDFium2 document loader. For detailed documentation of all ModuleNameLoader features and configurations head to the API reference.

Overview

Integration details

Class	Package	Local	Serializable	JS support
PyPDFium2Loader	langchain_community	✅	❌	❌

Loader features

Source	Document Lazy Loading	Native Async Support
PyPDFium2Loader	✅	❌

Setup

To access PyPDFium2 document loader you'll need to install the langchain-community integration package.

Credentials

No credentials are needed.

If you want to get automated best in-class tracing of your model calls you can also set your LangSmith API key by uncommenting below:

# os.environ["LANGSMITH_API_KEY"] = getpass.getpass("Enter your LangSmith API key: ")
# os.environ["LANGSMITH_TRACING"] = "true"

Installation

Install langchain_community.

%pip install -qU langchain_community

Initialization

Now we can instantiate our model object and load documents:

from langchain_community.document_loaders import PyPDFium2Loader

file_path = "./example_data/layout-parser-paper.pdf"
loader = PyPDFium2Loader(file_path)

API Reference:PyPDFium2Loader

Load

docs = loader.load()
docs[0]

Document(metadata={'source': './example_data/layout-parser-paper.pdf', 'page': 0}, page_content='LayoutParser: A Unified Toolkit for Deep\r\nLearning Based Document Image Analysis\r\nZejiang Shen\r\n1\r\n(), Ruochen Zhang\r\n2\r\n, Melissa Dell\r\n3\r\n, Benjamin Charles Germain\r\nLee\r\n4\r\n, Jacob Carlson\r\n3\r\n, and Weining Li\r\n5\r\n1 Allen Institute for AI\r\nshannons@allenai.org 2 Brown University\r\nruochen zhang@brown.edu 3 Harvard University\r\n{melissadell,jacob carlson}@fas.harvard.edu\r\n4 University of Washington\r\nbcgl@cs.washington.edu 5 University of Waterloo\r\nw422li@uwaterloo.ca\r\nAbstract. Recent advances in document image analysis (DIA) have been\r\nprimarily driven by the application of neural networks. Ideally, research\r\noutcomes could be easily deployed in production and extended for further\r\ninvestigation. However, various factors like loosely organized codebases\r\nand sophisticated model configurations complicate the easy reuse of im\x02portant innovations by a wide audience. Though there have been on-going\r\nefforts to improve reusability and simplify deep learning (DL) model\r\ndevelopment in disciplines like natural language processing and computer\r\nvision, none of them are optimized for challenges in the domain of DIA.\r\nThis represents a major gap in the existing toolkit, as DIA is central to\r\nacademic research across a wide range of disciplines in the social sciences\r\nand humanities. This paper introduces LayoutParser, an open-source\r\nlibrary for streamlining the usage of DL in DIA research and applica\x02tions. The core LayoutParser library comes with a set of simple and\r\nintuitive interfaces for applying and customizing DL models for layout de\x02tection, character recognition, and many other document processing tasks.\r\nTo promote extensibility, LayoutParser also incorporates a community\r\nplatform for sharing both pre-trained models and full document digiti\x02zation pipelines. We demonstrate that LayoutParser is helpful for both\r\nlightweight and large-scale digitization pipelines in real-word use cases.\r\nThe library is publicly available at https://layout-parser.github.io.\r\nKeywords: Document Image Analysis· Deep Learning· Layout Analysis\r\n· Character Recognition· Open Source library· Toolkit.\r\n1 Introduction\r\nDeep Learning(DL)-based approaches are the state-of-the-art for a wide range of\r\ndocument image analysis (DIA) tasks including document image classification [11,\r\narXiv:2103.15348v2 [cs.CV] 21 Jun 2021\n')

print(docs[0].metadata)

{'source': './example_data/layout-parser-paper.pdf', 'page': 0}

Lazy Load

page = []
for doc in loader.lazy_load():
    page.append(doc)
    if len(page) >= 10:
        # do some paged operation, e.g.
        # index.upsert(page)

        page = []

API reference

For detailed documentation of all PyPDFium2Loader features and configurations head to the API reference: https://python.langchain.com/api_reference/community/document_loaders/langchain_community.document_loaders.pdf.PyPDFium2Loader.html

Related

• Document loader conceptual guide
• Document loader how-to guides