python中的虚函数，python函数,class Super:

python中的虚函数，python函数,class Super:

class Super:    def method(self):        print 'in Super.method'           def delegate(self):        self.action()                 class Inheritor(Super):                   passclass Replacer(Super):                    def method(self):        print 'in Replacer.method'class Extender(Super):                    def method(self):        print 'starting Extender.method'        Super.method(self)        print 'ending Extender.method'class Provider(Super):                    def action(self):        print 'in Provider.action'if __name__ == '__main__':    for klass in (Inheritor, Replacer, Extender):        print '\n' + klass.__name__ + '...'        klass().method()    print '\nProvider...'    x = Provider()    x.delegate()