設計模式之python版（七）–模板方法模式

模板方法模式：

應用特性：重複做相同邏輯的事情，但是具體細節不同的情境

結構特性：相同邏輯抽取至父類，具體細節留置子類。可以說是對邏輯的抽象

UML：

#!/usr/bin/env python  #encoding: utf-8  class template:    def __init__(self):        pass        def logic(self):        print 'do something before ....'        print self.do_something_now()        print 'do something after ....'            def do_something_now(self):        return None              class apply_temp1(template):    def __init__(self):        pass        def do_something_now(self):        return 'apply 1'      class apply_temp2(template):    def __init__(self):        pass        def do_something_now(self):        return 'apply 2'            if '__main__' == __name__:      obj1 = apply_temp1()    obj2 = apply_temp2()    obj1.logic()    obj2.logic()    print obj1.__class__    print obj2.__class__

結果：

do something before ....apply 1do something after ....do something before ....apply 2do something after ....__main__.apply_temp1__main__.apply_temp2