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()
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