访问者模式

# -*- coding: cp936 -*-

class Person:
    def Accept(self,visitor):
        pass

class Man(Person):
    def Accept(self,visitor):
        visitor.GetManConclusion(self)

class Woman(Person):
    def Accept(self,visitor):
        visitor.GetWomanConclusion(self)

class Action:
    def GetManConclusion(self,concreteElementA):
        pass
    def GetWomanConclusion(self,concreteElementB):
        pass

class Success(Action):
    def GetManConclusion(self,concreteElementA):
        print "男人成功时，背后有个伟大的女人"
    def GetWomanConclusion(self,concreteElementB):
        print "女人成功时，背后有个不成功的男人"

class Failure(Action):
    def GetManConclusion(self,concreteElementA):
        print "男人失败时，闷头喝酒，谁也不用劝"
    def GetWomanConclusion(self,concreteElementB):
        print "女人失败时，眼泪汪汪，谁也劝不了"


#class ObjectStructure:
#    def __init__(self):
#        self.plist=[]
#    def Add(self,p):
#        self.plist=self.plist+[p]
#    def Display(self,act):
#        for p in self.plist:
#            p.Accept(act)

#if __name__ == "__main__":
#    os = ObjectStructure()
#    os.Add(Man())
#    os.Add(Woman())
#    sc = Success()
#    os.Display(sc)
#    fl = Failure()
#    os.Display(fl)

if __name__ == "__main__":
    man=Man()
    woman=Woman()
    sc =Success()
    fl =Failure()

    man.Accept(sc)
    woman.Accept(sc)
    
    man.Accept(fl)
    woman.Accept(fl)