題目：已知Person類，繼承Person類生成Teacher類（增加參數：科目）和Student類（增加參數：專業）。

已知Person類如下：

class Person(object):# Person類的構造方法，參數：姓名，年齡，性別def __init__(self,name='',age=20,sex='man'):self.setName(name)self.setAge(age)self.setSex(sex)# setName方法用于設置姓名def setName(self, name):if not isinstance(name, str):print('name must be string.')returnself.__name=name# setAge方法用于設置年齡def setAge(self, age):if not isinstance(age, int):print('age must be integer.')returnself.__age=age# setSex方法用于設置性別def setSex(self, sex):if sex not in ('man', 'woman'):print('sex must be "man" or "woman"')returnself.__sex=sex# show方法用于顯示姓名，年齡，性別def show(self):print('Name:', self.__name)print('Age:', self.__age)print('Sex:', self.__sex)

Teacher類繼承Person類，新增參數：科目：

class Teacher(Person):# Teacher類的構造方法，參數：姓名，年齡，性別，科目（前三個參數繼承自父類）def __init__(self,name='',age=30,sex='man',department='Computer'):super(Teacher,self).__init__(name,age,sex)##or,use another method like:Person.__init__(name,age,sex)self.setDepartment(department)# setDepartment方法用于設置科目def setDepartment(self,department):if not isinstance(department,str):print('department must be a string.')returnself.__department=department# show方法用于顯示姓名，年齡，性別，科目def show(self):super(Teacher, self).show()print('Department：',self.__department)

Student類繼承Person類，新增參數：專業

class Student(Person):# Student類的構造方法，參數：姓名，年齡，性別，專業（前三個參數繼承自父類）def __init__(self,name='',age=30,sex='man',major='Software'):super(Student,self).__init__(name,age,sex)##or,use another method like:Person.__init__(name,age,sex)self.setMajor(major)# setMajor方法用于設置專業def setMajor(self,major):if not isinstance(major,str):print('major must be a string.')returnself.__major=major# show方法用于顯示姓名，年齡，性別，專業def show(self):super(Student, self).show()print('Major：',self.__major)

main函數如下：

if __name__ == '__main__':# 父類Person對象zhangsan=Person('zhang San',10,'man')zhangsan.show()# 子類Teacher對象lisi=Teacher('Li Si',30,'woman','Math')lisi.show()# 子類Student對象wangwu=Student('Wang Wu',18,'man','Software')wangwu.show()

總結

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