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