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41 lines
1.5 KiB
Python
41 lines
1.5 KiB
Python
"""Loading logic for loading documents from an Azure Blob Storage container."""
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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.azure_blob_storage_file import (
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AzureBlobStorageFileLoader,
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)
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from langchain.document_loaders.base import BaseLoader
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class AzureBlobStorageContainerLoader(BaseLoader):
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"""Loading logic for loading documents from Azure Blob Storage."""
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def __init__(self, conn_str: str, container: str, prefix: str = ""):
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"""Initialize with connection string, container and blob prefix."""
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self.conn_str = conn_str
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self.container = container
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self.prefix = prefix
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def load(self) -> List[Document]:
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"""Load documents."""
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try:
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from azure.storage.blob import ContainerClient
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except ImportError as exc:
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raise ValueError(
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"Could not import azure storage blob python package. "
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"Please install it with `pip install azure-storage-blob`."
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) from exc
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container = ContainerClient.from_connection_string(
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conn_str=self.conn_str, container_name=self.container
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)
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docs = []
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blob_list = container.list_blobs(name_starts_with=self.prefix)
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for blob in blob_list:
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loader = AzureBlobStorageFileLoader(
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self.conn_str, self.container, blob.name # type: ignore
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)
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docs.extend(loader.load())
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return docs
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