[issue39754] update_one_slot() does not inherit sq_contains and mp_subscript if they are explictly declared

Change by Marco Sulla : -- resolution: -> duplicate stage: -> resolved status: open -> closed ___ Python tracker ___ ___

[issue39754] update_one_slot() does not inherit sq_contains and mp_subscript if they are explictly declared

Benjamin Peterson added the comment: See also #34396. -- nosy: +benjamin.peterson ___ Python tracker ___ ___ Python-bugs-list

[issue39754] update_one_slot() does not inherit sq_contains and mp_subscript if they are explictly declared

New submission from Marco Sulla : I noticed that `__contains__()` and `__getitem__()` of subclasses of `dict` are much slower. I asked why on StackOverflow, and an user seemed to find the reason. The problem for him/her is that `dict` implements directly `__contains__()` and