python之面向对象之继承

#写一个类SchoolMember
class SchoolMember(object):
    member_num = 0
    def __init__(self,name,age,sex):
        self.name = name
        self.age = age
        self.sex = sex
        self.reg()
        # self.member_num += 1
    def reg(self):
        SchoolMember.member_num += 1
        print("SchoolMember[%s] is come to school,SchoolMember [%s] is already registered" %(self.member_num,self.name))
    def tell(self):
        print("hello,my name is [%s],and my age is [%s]" %(self.name,self.age))
 
#写一个SchollMember的子类teacher
class Teacher(SchoolMember):
    def __init__(self,name,age,sex,course,salary):
        super(Teacher,self).__init__(name,age,sex)
        self.course = course
        self.salary = salary
    def teaching(self):
        print("Teacher [%s] is teaching [%s]" %(self.name,self.course))
 
class Student(SchoolMember):
    def __init__(self,name,age,sex,course,xufei):
        super(Student,self).__init__(name,age,sex)
        self.course = course
        self.xufei = xufei
    def pay_money(self):
        print("student [%s] must pay [%s] to school" %(self.name,self.xufei))
 
#首先分别创建2个teacher的实例和2个student的实例
 
print("首先分别创建2个teacher的实例和2个student的实例")
t1 = Teacher("teacher1","12","M","python","123")
t2 = Teacher("teacher2","13","M","shell","234")
s1 = Student("Student1","1","W","python","1234")
s2 = Student("Student2","2","M","shell","12345")
 
# 首先分别创建2个teacher的实例和2个student的实例
# SchoolMember[1] is come to school,SchoolMember [teacher1] is already registered
# SchoolMember[2] is come to school,SchoolMember [teacher2] is already registered
# SchoolMember[3] is come to school,SchoolMember [Student1] is already registered
# SchoolMember[4] is come to school,SchoolMember [Student2] is already registered
 
print("teacher调用父类SchoolMember的方法tell")
t1.tell()
t2.tell()
 
# teacher调用父类SchoolMember的方法tell
# hello,my name is [teacher1],and my age is [12]
# hello,my name is [teacher2],and my age is [13]
 
print("teacher实例调用teacher类的方法")
t1.teaching()
t2.teaching()
 
# teacher实例调用teacher类的方法
# Teacher [teacher1] is teaching [python]
# Teacher [teacher2] is teaching [shell]
 
print("student调用父类SchoolMember的方法tell")
s1.tell()
s2.tell()
 
# student调用父类SchoolMember的方法tell
# hello,my name is [Student1],and my age is [1]
# hello,my name is [Student2],and my age is [2]
 
print("student实例调用student类的方法")
s1.pay_money()
s2.pay_money()
 
# student实例调用student类的方法
# student [Student1] must pay [1234] to school
# student [Student2] must pay [12345] to school