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    • 简单的策略模式
    Experiences and Insight 703 views · 1 replies ·
    Tofloor
    poster avatar
    z85525006
    deepin
    2012-06-13 21:18
    Author
    策略模式是对算法的一种封装。
    1. class Opertion(object):
    2.     def oper(a, b):
    3.         pass
    5. class Sub(object):
    6.     def oper(self,a, b):
    7.         return a - b
    8.    
    9. class Div(object):
    10.     def oper(self,a, b):
    11.         return float(a) / b
    12.    
    13. class Add(object):
    14.     def oper(self,a, b):
    15.         return a + b
    17. class Cls(object):
    18.     def __init__(self, oper):
    19.         self.op = oper
    20.         
    21.     def oper(self, a, b):   
    22.         return self.op.oper(a, b)
    23.         
    24. if __name__ == "__main__":
    25.     cls = Cls(Add())
    26.     print cls.oper(3, 4)
    27.     cls = Cls(Sub())
    28.     print cls.oper(3, 4)
    29.     cls = Cls(Div())
    30.     print cls.oper(3, 4)
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    cnchanghai
    deepin
    2012-06-14 04:40
    #1
    这个有啥用
    Reply View the author