Metaclass test

metaclass_test.py

class MyMeta(type):
    def __init__(cls, name, bases, attrs):
        print "__init__ is called"
        type.__init__(cls, name, bases, attrs)

    def __call__(cls, *args, **kargs):
        print "I am called"
        return type.__call__(cls, *args, **kargs)

    def __setattr__(cls, name, value):
        print "__setattr__ is called"
        type.__setattr__(cls, name, value)


class MyClass(object):
    __metaclass__ = MyMeta

    def __init__(self):
        pass

    def __setattr__(self, name, value):
        print "Myclass.__setattr__ is called"
        super(MyClass, self).__setattr__(name, value)

if __name__ == '__main__':
    c = MyClass()
    MyClass.a = 1
    c.s = 1