# -*- cdoing: utf-8 -*-

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":
            print("IllegalInputError")
        else:
            self.__gender = gender

# 测试:
bart = Student('Bart', 'male')
if bart.get_gender() != 'male':
    print('测试失败!')
else:
    bart.set_gender('female')
    if bart.get_gender() != 'female':
        print('测试失败!')
    else:
        print('测试成功!')