moved files into src folder

shared/datastore/src/get.py

@@ -0,0 +1,39 @@
+"""Definition of get function."""
+
+import logging
+import os
+from io import BytesIO
+from traceback import print_exc
+
+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='')
+    # get buffer
+    try:
+        response = client.get_object(
+            bucket_name=bucket_name,
+            object_name=object_name,
+        )
+        assert response.status == 200
+        buffer = BytesIO()
+        chunk_size = 2**14
+        while chunk := response.read(chunk_size):
+            buffer.write(chunk)
+        buffer.seek(0)
+        logging.debug('got %s', object_name)
+        return buffer
+    except Exception as exc:
+        logging.error('failed getting data from MinIO')
+        print_exc()
+        raise exc
+    finally:
+        response.close()
+        response.release_conn()