クラスを調べるときに試したコード

classtest.py

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

import traceback


def aaa(cls):

    __class__ = cls

    def bbb(y):
        return super().__init__()

    return bbb



def bbb(instance, cls):

    __class__ = cls

    super().__init__()
        


def check__class__(f):

    print('***', f.__name__, 'defined at line', f.__code__.co_firstlineno)

    if '__class__' in f.__code__.co_freevars:
        print('***', f.__name__, id(f), 'has __class__')
    else:
        print('***', f.__name__, id(f), '''doesn't have __class__''')

    return f



def get__class__(f):

    try:
        cls = f(10)
        print('aaaaaaaaaaa', cls)
    except Exception as e:
        print(e)

    

class Base(object):

    @check__class__
    def __init__(self):
        print('self', self, 'in Base.__init__')
        print('aaaa')

        super().__init__()

    @check__class__
    def test(self, x):

        print('self', self)
        print('__class__', __class__)
        print('basetest', x)



class Derived(Base):

    @check__class__
    def __init__(self):
        print('self', self, 'in Derived.__init__')

        x = 10

        print(locals())

        print('__class__:', __class__)

        print('bbbb')

        super().__init__()


    @check__class__
    def somefunc(self, y):
        pass

    @check__class__
    def somefunc2(self, y):
        super(Derived, self).test(10)


    @get__class__
    def somehaveclass(self):
        if 0:
            super()

        return __class__


@check__class__
def outertest(self, x):

    print('derivedtest', x)

    super().test(x)


Derived.test = outertest

Derived.aaa = aaa(Base)
Derived().aaa()


if __name__ == '__main__':

    # OK
    print('---------- クラス定義と一緒に定義した普通のメソッド ----------')
    d = Derived()
    check__class__(Derived.__init__)

    print('---------- クラスに後から追加した関数をメソッドとして呼び出す ----------')
    try:
        # __class__ がない
        d.test(10)
    except SystemError as e:
        print('!!!!!!!!! エラーでたー !!!!!!!')
        traceback.print_exc()

    print('---------- type() を使ってクラスを作ってみる ----------')
    SomeTest = type('SomeTest', (Base,), {'test': outertest})

    check__class__(SomeTest.test)

    b = SomeTest()
    
    try:
        b.test(1)
    except SystemError as e:
        print('!!!!!!!!! エラーでたー !!!!!!!')
        traceback.print_exc()


    try:
        Derived.__init__('aaaa')
    except Exception as e:
        print(e)


def make_class():

    def __init__(self):
        super().__init__()

    def somefunc(self):
        print('test')
        

    __class__ = type('classname', (object,), locals())

    return __class__


C = make_class()
a = C()
a.somefunc()

classtest2.py

class Base(object):

    def __init__(self):
        pass


    def test(self, x):
        print('basetest', x)


class Derived(Base):


    def __init__(self):
        super().__init__()


def outertest(self, x):
    print('derivedtest', x)
    super().test(x)


Derived.test = outertest

a = Derived()
a.test(10)