class Super: def method(self): print 'in Super.method' def delegate(self): self.action() class Inheritor(Super): pass class 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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