python3 implicit __class__ variable

test.py

#-*- coding:utf-8 -*-

import traceback


class Base(object):

    def test(self):

        print('called')


class Test(Base):

    def __init__(self):

        print(__class__)


    def call_super(self):

        super().test()


    def set_class(self):
        ''' ローカルスコープ外にある __class__ を書き換える '''

        nonlocal __class__

        __class__ = 10


    def call_with_otherself(self):
        ''' super() の前に self を書き換える '''

        self = 10

        super()


    def print_class(self):

        print(__class__)



def catch(f):

    try:
        f()
    except:
        traceback.print_exc()
        

if __name__ == '__main__':

    a = Test()
    a.print_class()

    catch(lambda: a.call_with_otherself())
    
    a.call_super()
    a.set_class()
    a.print_class()
    catch(lambda: a.call_super())