Fix mypy

Author: luolingchun

flask_openapi3/request.py

@@ -7,9 +7,10 @@
 from typing import Any, Type, Optional, Dict, get_origin, get_args, Union
 
 try:
-    from types import UnionType  # Python 3.10+
+    from types import UnionType  # type: ignore
 except ImportError:
-    UnionType = type(Union)
+    # python < 3.9
+    UnionType = type(Union)  # type: ignore
 
 from flask import request, current_app, abort
 from pydantic import ValidationError, BaseModel, RootModel

flask_openapi3/utils.py

@@ -11,9 +11,10 @@
 from typing import get_type_hints, Dict, Type, Callable, List, Tuple, Optional, Any, DefaultDict, Union
 
 try:
-    from types import UnionType  # Python 3.10+
+    from types import UnionType  # type: ignore
 except ImportError:
-    UnionType = type(Union)
+    # python < 3.9
+    UnionType = type(Union)  # type: ignore
 
 from flask import make_response, current_app
 from flask.wrappers import Response as FlaskResponse