'''
继承
共用相同方法 属性
'''

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_movie(self):
 if self._age >= 18:
 print('%s正在观看爱情动作片.' % self._name)
 else:
 print('%s只能观看《熊出没》.' % self._name)

class Student(Person):
 '''学生'''

 def __init__(self, name, age, grade):
 super(Student, self).__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, name, age, title):
 super(Teacher, self).__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的%s正在教授%s.' % (self._title, self._name, course))

def main():
 student = Student('小明', 16, '高中')
 student.study('数学')
 student.watch_movie() 
 teacher = Teacher('小红', 22, '叫兽')
 teacher.teach('java入门到精通')
 teacher.watch_movie()

if __name__ == '__main__':
 main()