fix: return list instead of sequence

Author: mschoettle

rest_framework-stubs/permissions.pyi

@@ -16,7 +16,7 @@ class _SupportsHasPermission(Protocol):
 # https://github.com/python/mypy/issues/12392
 _PermissionClass: TypeAlias = type[BasePermission] | OperandHolder | SingleOperandHolder
 
-class OperationHolderMixin:
+class OperationHolderMixin(_SupportsHasPermission):
     def __and__(self, other: _PermissionClass) -> OperandHolder: ...
     def __or__(self, other: _PermissionClass) -> OperandHolder: ...
     def __rand__(self, other: _PermissionClass) -> OperandHolder: ...

rest_framework-stubs/views.pyi

@@ -71,7 +71,7 @@ class APIView(View):
     def get_renderers(self) -> list[BaseRenderer]: ...
     def get_parsers(self) -> list[BaseParser]: ...
     def get_authenticators(self) -> list[BaseAuthentication]: ...
-    def get_permissions(self) -> Sequence[_SupportsHasPermission]: ...
+    def get_permissions(self) -> list[_SupportsHasPermission]: ...
     def get_throttles(self) -> list[BaseThrottle]: ...
     def get_content_negotiator(self) -> BaseContentNegotiation: ...
     def get_exception_handler(self) -> Callable: ...

tests/typecheck/test_views.yml

@@ -70,8 +70,19 @@
     from typing import List
 
     from rest_framework.viewsets import GenericViewSet
-    from rest_framework.permissions import BasePermission
+    from rest_framework.permissions import _SupportsHasPermission
 
     class MyView(GenericViewSet):
-        def get_permissions(self) -> List[BasePermission]:
-            ...
+        def get_permissions(self) -> List[_SupportsHasPermission]:
+            return super().get_permissions()
+
+- case: test_override_get_permissions_operandholder
+  main: |
+    from typing import Sequence
+
+    from rest_framework.viewsets import GenericViewSet
+    from rest_framework.permissions import BasePermission, IsAuthenticated, IsAdminUser, _SupportsHasPermission
+
+    class MyView(GenericViewSet):
+        def get_permissions(self) -> list[_SupportsHasPermission]:
+            return [IsAuthenticated & IsAdminUser]