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交作业，使用 markdown，利人利己……

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Nathan_Hu_

#1 Created at ... [Delete] [Delete and Lock User] 
class Student(object):
    def __init__(self, name, gender):
        self.name = name
        self.__gender = gender
    def get_gender(self):
        return self.__gender
    def set_gender(self, gender):
        if gender != 'male' and gender != 'female':
            raise ValueError('bad gender input!')
        self.__gender = gender

在 ``` ``` 中间写代码，不知道的可以百度一下亲~

股市故事孤石

#2 Created at ... [Delete] [Delete and Lock User]

if 语句里的条件设置错误，应该把and换成or,或者用下面的语句代替 if gender != 'male' or 'female' if gender not in ('male','female')

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