diff --git a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api_client.py b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api_client.py
index 08322912b4e6..884f1c37cfda 100644
--- a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api_client.py
+++ b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api_client.py
@@ -372,7 +372,6 @@ def sanitize_for_serialization(self, obj):
             # Convert attribute name to json key in
             # model definition for request.
             if hasattr(obj, 'to_dict') and callable(getattr(obj, 'to_dict')):
-
                 obj_dict = obj.to_dict()
             else:
                 obj_dict = obj.__dict__
diff --git a/samples/client/echo_api/python/openapi_client/api_client.py b/samples/client/echo_api/python/openapi_client/api_client.py
index 08322912b4e6..884f1c37cfda 100644
--- a/samples/client/echo_api/python/openapi_client/api_client.py
+++ b/samples/client/echo_api/python/openapi_client/api_client.py
@@ -372,7 +372,6 @@ def sanitize_for_serialization(self, obj):
             # Convert attribute name to json key in
             # model definition for request.
             if hasattr(obj, 'to_dict') and callable(getattr(obj, 'to_dict')):
-
                 obj_dict = obj.to_dict()
             else:
                 obj_dict = obj.__dict__
diff --git a/samples/openapi3/client/petstore/python-aiohttp/petstore_api/api_client.py b/samples/openapi3/client/petstore/python-aiohttp/petstore_api/api_client.py
index b47a7dbd9b51..db6c9643359c 100644
--- a/samples/openapi3/client/petstore/python-aiohttp/petstore_api/api_client.py
+++ b/samples/openapi3/client/petstore/python-aiohttp/petstore_api/api_client.py
@@ -374,7 +374,6 @@ def sanitize_for_serialization(self, obj):
             # Convert attribute name to json key in
             # model definition for request.
             if hasattr(obj, 'to_dict') and callable(getattr(obj, 'to_dict')):
-
                 obj_dict = obj.to_dict()
             else:
                 obj_dict = obj.__dict__
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api_client.py b/samples/openapi3/client/petstore/python/petstore_api/api_client.py
index 2af639b82dac..1c773930f1fe 100755
--- a/samples/openapi3/client/petstore/python/petstore_api/api_client.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api_client.py
@@ -371,7 +371,6 @@ def sanitize_for_serialization(self, obj):
             # Convert attribute name to json key in
             # model definition for request.
             if hasattr(obj, 'to_dict') and callable(getattr(obj, 'to_dict')):
-
                 obj_dict = obj.to_dict()
             else:
                 obj_dict = obj.__dict__