added minio interface

shared/data_store/get.py

@@ -0,0 +1,27 @@
+"""Definition of get function."""
+from __future__ import annotations
+
+import os
+from io import BytesIO
+
+from minio import Minio
+
+
+def get(
+    client: Minio,
+    object_name: str,
+) -> BytesIO:
+    """Get buffer from bucket in MinIO."""
+    assert isinstance(client, Minio)
+    assert isinstance(object_name, str)
+    bucket_name = os.getenv('MINIO_BUCKET_NAME', default=None)
+    assert isinstance(bucket_name, str)
+    # get buffer
+    try:
+        response = client.get_object(bucket_name, object_name)
+        buffer = BytesIO(response.data)
+    finally:
+        response.close()
+        response.release_conn()
+    buffer.seek(0)
+    return buffer