chore: fix Python 3.5 compat

Author: mhaas

sap/aibus/dar/client/inference_client.py

@@ -172,7 +172,7 @@ def predict_call(work_package):
                     {
                         "objectId": inference_object.get("objectId", None),
                         "labels": None,
-                        "_sdk_error": f"{exc.__class__.__name__}: {exc}",
+                        "_sdk_error": "{}: {}".format(exc.__class__.__name__, str(exc)),
                     }
                     for inference_object in work_package
                 ]

tests/sap/aibus/dar/client/test_inference_client.py

@@ -294,7 +294,7 @@ def test_bulk_inference_error(self, inference_client: InferenceClient):
                 "labels": None,
                 # If this test fails, I found it can make pytest/PyCharm hang because it
                 # takes too much time in difflib.
-                "_sdk_error": f"{exc.__class__.__name__}: {exc}",
+                "_sdk_error": "{}: {}".format(exc.__class__.__name__, str(exc)),
             }
 
             expected_response = []
@@ -332,7 +332,9 @@ def test_bulk_inference_error_no_object_ids(
             "labels": None,
             # If this test fails, I found it can make pytest/PyCharm hang because it
             # takes too much time in difflib.
-            "_sdk_error": f"{exception_404.__class__.__name__}: {exception_404}",
+            "_sdk_error": "{}: {}".format(
+                exception_404.__class__.__name__, str(exception_404)
+            ),
         }
         expected_response = []
         expected_response.extend(