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不管是黑猫还是白猫,能抓老鼠都是好猫

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#1 Created at ... [Delete] [Delete and Lock User] 
class cat(object):
        pass

    class Black_cat(cat):
        def catch_mouse():
            return True

    class White_cat(cat):
        def catch_mouse():
            return True

    class Pet_cat(cat):
        def catch_mouse():
            return False

    class dog(object):
        def catch_mouse():
            return True

    def good_cat(cat):
       if cat.catch_mouse():
           print('It\'s a good cat')
       else:print('It\'s a bad cat')

代码测试

    good_cat(Black_cat)
    good_cat(White_cat)
    good_cat(Pet_cat)
    good_cat(dog)

输出结果

    It's a good cat
    It's a good cat
    It's a bad cat
    It's a good cat

在python中, 狗也是好猫.

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