Fix UnionType

Author: CodeWithSwastik

discord/app/commands.py

@@ -387,7 +387,10 @@ def parse_options(self, params) -> List[Option]:
         return final_options
 
     def _is_typing_union(self, annotation):
-        return getattr(annotation, "__origin__", None) in (Union, getattr(types, "UnionType", Union)) # type: ignore
+        return (
+            getattr(annotation, '__origin__', None) is Union
+            or annotation is getattr(types, "UnionType", Union)
+        ) # type: ignore
 
     def _is_typing_optional(self, annotation):
         return self._is_typing_union(annotation) and type(None) in annotation.__args__  # type: ignore

discord/ext/commands/core.py

@@ -1020,8 +1020,11 @@ def short_doc(self) -> str:
         return ''
 
     def _is_typing_optional(self, annotation: Union[T, Optional[T]]) -> TypeGuard[Optional[T]]:
-        return getattr(annotation, '__origin__', None) in (Union, getattr(types, "UnionType", Union)) and type(None) in annotation.__args__  # type: ignore
-
+        return (
+            (getattr(annotation, '__origin__', None) is Union
+            or annotation is getattr(types, "UnionType", Union))
+            and type(None) in annotation.__args__  # type: ignore
+        )
     @property
     def signature(self) -> str:
         """:class:`str`: Returns a POSIX-like signature useful for help command output."""