The following code demonstrates how to load objects from the Huawei OBS (Object Storage Service) as documents. 
# Install the required package
# pip install esdk-obs-python

from langchain_community.document_loaders import OBSDirectoryLoader

endpoint = "your-endpoint"

# Configure your access credentials\n
config = {"ak": "your-access-key", "sk": "your-secret-key"}
loader = OBSDirectoryLoader("your-bucket-name", endpoint=endpoint, config=config)

loader.load()

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Specify a Prefix for Loading

If you want to load objects with a specific prefix from the bucket, you can use the following code: 
loader = OBSDirectoryLoader(
    "your-bucket-name", endpoint=endpoint, config=config, prefix="test_prefix"
)

loader.load()

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Get Authentication Information from ECS

If your langchain is deployed on Huawei Cloud ECS and Agency is set up, the loader can directly get the security token from ECS without needing access key and secret key. 
config = {"get_token_from_ecs": True}
loader = OBSDirectoryLoader("your-bucket-name", endpoint=endpoint, config=config)

loader.load()

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Use a Public Bucket

If your bucket’s bucket policy allows anonymous access (anonymous users have listBucket and GetObject permissions), you can directly load the objects without configuring the config parameter. 
loader = OBSDirectoryLoader("your-bucket-name", endpoint=endpoint)

loader.load()