class Student(object):

    #定义一个Student类，

    def __init__(self, name, score,age,gender):

        self.__name = name

        self.__score = score

        self.__age = age

        self.__gender = gender

        #使用两个_对变量进行私有化，其实例对象不可直接调用变量

    def get_name(self):

        return self.__name

    def get_grade(self):

        return self.__grade

    def get_age(self):

        return self.__age

    def get_gender(self):

        return self.__gender

        #定义类方法get获取name、grade、age

    def set_name(self,name):

        self.__name = name

    def set_score(self,score):

        self.__score = score

    def set_age(self,age):

        self.__age = age

    def set_gender(self,gender):

        if gender == 'man':

            self.__gender = gender

        elif gender == 'girl':

            self.__gender = gender

        else:

            print('gender,参数提供错误，请重新修改')

        #定义类方法set，更改变量值

st1 = Student('lingyummu',67,25,'boy')

    #创建一个Student类对象st1

print(st1.get_name(),st1.get_gender())

    #使用get方法获取变量值

st1.set_name('zhangsan')

    #使用set方法修改变量值

print(st1.get_name())

st1.set_gender('boy')

print(st1.get_gender())