Python class and object

# Python继承
class Person(object):
    """人"""

    def __init__(self,name,age):
        self._name = name
        self._age = age

    @property
    def name(self):
        return self._name

    @property
    def age(self):
        return self._age

    @age.setter
    def age(self,age):
        self._age = age

    def play(self):
        print(‘%s正在愉快的玩耍.‘ % self._name)

    def watch_av(self):
        if self._age >= 18:
            print(‘%s正在观看动作片.‘ % self._name)
        else:
            print(‘%s只能观看《熊出没》.‘ % self._name)


class Student(Person):
    """学生"""

    def __init__(self,age,grade):
        super().__init__(name,age)
        self._grade = grade

    @property
    def grade(self):
        return self._grade

    @grade.setter
    def grade(self,grade):
        self._grade = grade

    def study(self,course):
        print(‘%s的%s正在学习%s.‘ % (self._grade,self._name,course))


class Teacher(Person):
    """老师"""

    def __init__(self,title):
        super().__init__(name,age)
        self._title = title

    @property
    def title(self):
        return self._title

    @title.setter
    def title(self,title):
        self._title = title

    def teach(self,course):
        print(‘%s%s正在讲%s.‘ % (self._name,self._title,course))


def main():
    stu = Student(‘王二小‘,15,‘初三‘)
    stu.study(‘数学‘)
    stu.watch_av()
    t = Teacher(‘Anthony‘,38,‘老叫兽‘)
    t.teach(‘Python程序设计‘)
    t.watch_av()


if __name__ == ‘__main__‘:
    main()