Python——类继承2

class SchoolMember(object):
    members=0 #类变量
    def __init__(self,name,age):
        self.name=name
        self.age=age
    def tell(self):
        pass
    def enroll(self):
        '''注册'''
        SchoolMember.members+=1
        print('33[32;1mnew member [%s] is enrolled,now there are [%s] members33[0m' % (self.name,SchoolMember.members))
    def __del__(self):
        """析构方法"""
        print("33[31;1mmember [%s] is dead!33[0m" % self.name)
class Teacher(SchoolMember):
    def __init__(self,name,age,course,salary):
        super(Teacher,self).__init__(name,age)
        self.course=course
        self.salary=salary
        self.enroll()
    def teaching(self):
        """讲课方法"""
        print("Teacher [%s] is teaching [%s] for class [%s]" % (self.name,self.course,'s12'))
    def tell(self):
        '''自我介绍方法'''
        msg="Hi! my name is [%s],works for [%s] as a [%s] teacher!" % (self.name,'aaa学校',self.course)
        print(msg)
class Student(SchoolMember):
    def __init__(self,name,age,grade,sid):
        super(Student,self).__init__(name,age)
        self.grade=grade
        self.sid=sid
        self.enroll()
    def tell(self):
        """自我介绍方法"""
        msg="Hello!my name is [%s],I'm studying [%s] in [%s]" % (self.name,self.grade,"aaa学校")
        print(msg)
if __name__=='__main__':
    t1=Teacher("Alex",22,"python",20000)
    t2=Teacher("TengLan",29,"Linux",30000)
    s1=Student("Jack",24,"Python S12",1483)
    s2=Student("Susan",26,"Python S12",1484)
    t1.teaching()
    t2.teaching()
    t1.tell()