boto3 inline

csst_dfs_client/common/fs.py

@@ -4,7 +4,6 @@ from io import BytesIO
 import os
 import logging
 import threading
-import boto3
 from typing import Generator, Any
 from urllib.parse import urlparse
 from .config import get_storage_config
@@ -64,6 +63,7 @@ class S3FileStorage(FileStorage):
         if not self._is_initialized:
             with self._lock:
                 if not self._is_initialized:
+                    import boto3
                     self.s3_storage = s3_storage
                     parsed_url = urlparse(s3_storage)
                     bucket_name = parsed_url.netloc