Fix generic type

Author: EltonChou

modules/openapi-json-schema-generator/src/main/resources/python/api_client.handlebars

@@ -814,10 +814,11 @@ class JSONDetector:
 
 Response_T = typing.TypeVar("Response_T", bound=ApiResponse)
 
-class OpenApiResponse(JSONDetector):
-    __filename_content_disposition_pattern = re.compile('filename="(.+?)"')
+class OpenApiResponse(JSONDetector, typing.Generic[Response_T]):
     response_cls: typing.Type[Response_T]
 
+    __filename_content_disposition_pattern = re.compile('filename="(.+?)"')
+
     def __init__(
         self,
         response_cls: typing.Type[Response_T] = ApiResponse,

samples/openapi3/client/petstore/python/petstore_api/api_client.py

@@ -818,10 +818,11 @@ def _content_type_is_json(cls, content_type: str) -> bool:
 
 Response_T = typing.TypeVar("Response_T", bound=ApiResponse)
 
-class OpenApiResponse(JSONDetector):
-    __filename_content_disposition_pattern = re.compile('filename="(.+?)"')
+class OpenApiResponse(JSONDetector, typing.Generic[Response_T]):
     response_cls: typing.Type[Response_T]
 
+    __filename_content_disposition_pattern = re.compile('filename="(.+?)"')
+
     def __init__(
         self,
         response_cls: typing.Type[Response_T] = ApiResponse,