[issue8733] list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme

Raymond Hettinger added the comment: There will always be classes that don't call super() init, sometimes for efficiency and sometimes to preserve their internal invariants. Also, __init__() isn't the only method affected. For a perfectly cooperative class, all of the methods would need to

[issue8733] list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme

Change by Irit Katriel : -- versions: +Python 3.10, Python 3.9 -Python 3.5 ___ Python tracker ___ ___ Python-bugs-list mailing list

[issue8733] list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme

Changes by Yury Selivanov yselivanov...@gmail.com: -- versions: +Python 3.5 -Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8733 ___ ___

[issue8733] list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme

Changes by Daniel Urban urban.dani...@gmail.com: -- nosy: +durban ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8733 ___ ___ Python-bugs-list

[issue8733] list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme

New submission from Benjamin Peterson benja...@python.org: Why does it matter? They both inherit from object, so there's no one to pass parameters to. -- nosy: +benjamin.peterson ___ Python tracker rep...@bugs.python.org

[issue8733] list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme

Sagiv Malihi sagivmal...@gmail.com added the comment: Example: class A(object): def __init__(self): print initializing something very important # and then pay it forward... super(A, self).__init__() class B(list, A): pass b = B() # A's init is never called... --

[issue8733] list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme

Changes by Sagiv Malihi sagivmal...@gmail.com: -- nosy: +Sagiv.Malihi ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8733 ___ ___ Python-bugs-list

[issue8733] list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme

Changes by alon horev alo...@gmail.com: -- components: Extension Modules nosy: alonho priority: normal severity: normal status: open title: list type and UserList do not call super in __init__ and therefore, they cannot be parents in a multiple inheritence scheme type: behavior