集成了阿里云OSS、腾讯云对象存储和七牛云对象存储，为不同的对象存储实现了统一的Client，方便使用
pip install oss-client
from oss_client import AliyunClient
client = AliyunClient(
access_key=ALY_ACCESS_KEY_ID,
secret_key=ALY_ACCESS_KEY_SECRET,
endpoint=ALY_OSS_ENDPOINT,
bucket=ALY_OSS_BUCKET,
)
