Source code for langchain_community.document_loaders.gcs_directory
import logging
from typing import Callable, List, Optional
from langchain_core._api.deprecation import deprecated
from langchain_core.documents import Document
from langchain_community.document_loaders.base import BaseLoader
from langchain_community.document_loaders.gcs_file import GCSFileLoader
from langchain_community.utilities.vertexai import get_client_info
logger = logging.getLogger(__name__)
[docs]@deprecated(
since="0.0.32",
removal="0.3.0",
alternative_import="langchain_google_community.GCSDirectoryLoader",
)
class GCSDirectoryLoader(BaseLoader):
"""从GCS目录加载。"""
[docs] def __init__(
self,
project_name: str,
bucket: str,
prefix: str = "",
loader_func: Optional[Callable[[str], BaseLoader]] = None,
continue_on_failure: bool = False,
):
"""初始化使用存储桶和键名。
参数:
project_name:GCS存储桶所属项目的ID。
bucket:GCS存储桶的名称。
prefix:GCS存储桶的前缀。
loader_func:一个加载器函数,根据file_path参数实例化一个加载器。如果未提供任何内容,GCSFileLoader将使用其默认加载器。
continue_on_failure:对GCS目录中的每个文件使用try-except块。如果设置为`True`,则无法处理文件不会导致错误。
"""
self.project_name = project_name
self.bucket = bucket
self.prefix = prefix
self._loader_func = loader_func
self.continue_on_failure = continue_on_failure
[docs] def load(self) -> List[Document]:
"""加载文档。"""
try:
from google.cloud import storage
except ImportError:
raise ImportError(
"Could not import google-cloud-storage python package. "
"Please install it with `pip install google-cloud-storage`."
)
client = storage.Client(
project=self.project_name,
client_info=get_client_info(module="google-cloud-storage"),
)
docs = []
for blob in client.list_blobs(self.bucket, prefix=self.prefix):
# we shall just skip directories since GCSFileLoader creates
# intermediate directories on the fly
if blob.name.endswith("/"):
continue
# Use the try-except block here
try:
loader = GCSFileLoader(
self.project_name,
self.bucket,
blob.name,
loader_func=self._loader_func,
)
docs.extend(loader.load())
except Exception as e:
if self.continue_on_failure:
logger.warning(f"Problem processing blob {blob.name}, message: {e}")
continue
else:
raise e
return docs