UnstructuredLoader

Setup:

Install langchain-unstructured and set environment variable UNSTRUCTURED_API_KEY.

pip install -U langchain-unstructured
export UNSTRUCTURED_API_KEY="your-api-key"

Instantiate:

from langchain_unstructured import UnstructuredLoader

loader = UnstructuredLoader(
    file_path = ["example.pdf", "fake.pdf"],
    api_key=UNSTRUCTURED_API_KEY,
    partition_via_api=True,
    chunking_strategy="by_title",
    strategy="fast",
)

Lazy load:

docs = []
docs_lazy = loader.lazy_load()

# async variant:
# docs_lazy = await loader.alazy_load()

for doc in docs_lazy:
    docs.append(doc)
print(docs[0].page_content[:100])
print(docs[0].metadata)

1 2 0 2
{'source': './example_data/layout-parser-paper.pdf', 'coordinates': {'points': ((16.34, 213.36), (16.34, 253.36), (36.34, 253.36), (36.34, 213.36)), 'system': 'PixelSpace', 'layout_width': 612, 'layout_height': 792}, 'file_directory': './example_data', 'filename': 'layout-parser-paper.pdf', 'languages': ['eng'], 'last_modified': '2024-07-25T21:28:58', 'page_number': 1, 'filetype': 'application/pdf', 'category': 'UncategorizedText', 'element_id': 'd3ce55f220dfb75891b4394a18bcb973'}

Async load:

docs = await loader.aload()
print(docs[0].page_content[:100])
print(docs[0].metadata)

1 2 0 2
{'source': './example_data/layout-parser-paper.pdf', 'coordinates': {'points': ((16.34, 213.36), (16.34, 253.36), (36.34, 253.36), (36.34, 213.36)), 'system': 'PixelSpace', 'layout_width': 612, 'layout_height': 792}, 'file_directory': './example_data', 'filename': 'layout-parser-paper.pdf', 'languages': ['eng'], 'last_modified': '2024-07-25T21:28:58', 'page_number': 1, 'filetype': 'application/pdf', 'category': 'UncategorizedText', 'element_id': 'd3ce55f220dfb75891b4394a18bcb973'}

Load URL:

loader = UnstructuredLoader(web_url="https://www.example.com/")
print(docs[0])

page_content='Example Domain' metadata={'category_depth': 0, 'languages': ['eng'], 'filetype': 'text/html', 'url': 'https://www.example.com/', 'category': 'Title', 'element_id': 'fdaa78d856f9d143aeeed85bf23f58f8'}

print(docs[1])

page_content='This domain is for use in illustrative examples in documents. You may use this domain in literature without prior coordination or asking for permission.' metadata={'languages': ['eng'], 'parent_id': 'fdaa78d856f9d143aeeed85bf23f58f8', 'filetype': 'text/html', 'url': 'https://www.example.com/', 'category': 'NarrativeText', 'element_id': '3652b8458b0688639f973fe36253c992'}

References

https://docs.unstructured.io/api-reference/api-services/sdk https://docs.unstructured.io/api-reference/api-services/overview https://docs.unstructured.io/open-source/core-functionality/partitioning https://docs.unstructured.io/open-source/core-functionality/chunking