updated for readability

shared/datastore/src/get_image.py

@@ -7,6 +7,8 @@ from io import BytesIO
 from minio import Minio
 from PIL import Image
 
+from shared.utils import check_env
+
 
 def get_image(
     client: Minio,
@@ -17,11 +19,10 @@ def get_image(
     assert isinstance(object_name, str)
     assert len(object_name) > 0
     # prepare arguments
-    assert 'MINIO_BUCKET_NAME' in os.environ
-    bucket_name = os.getenv('MINIO_BUCKET_NAME', default='')
-    subfolder = 'images'
+    check_env({'MINIO_BUCKET_NAME'})
+    bucket_name = str(os.getenv('MINIO_BUCKET_NAME'))
+    object_name = f'images/{object_name}'
     # get object from bucket
-    object_name = f'{subfolder}/{object_name}'
     try:
         response = client.get_object(
             bucket_name=bucket_name,