实验：类的继承

 1 class SchoolMember:
 2     def __init__(self,name,age):
 3         self.name = name
 4         self.age = age
 5         print ‘Initialized SchoolMember:%s‘%self.name
 6         
 7     def tell(self):
 8         print ‘Name:%s Age:%s‘%(self.name,self.age)
 9         
10 class Teacher(SchoolMember):
11     def __init__(self, name, age,salary):
12         SchoolMember.__init__(self, name, age)
13         self.salary = salary
14         print ‘Initialized Teacher:%s‘%self.name
15         
16     def tell(self):
17         print ‘Salary:%d‘%self.salary
18         
19 class Student(SchoolMember):
20     def __init__(self, name, age,marks):
21         SchoolMember.__init__(self,name,age)
22         self.marks = marks
23         print ‘Initialized Student %s‘%self.name
24         
25     def tell(self):
26         print ‘Marks %s‘%self.marks
27         
28 t = Teacher(‘Mars‘,40,3000)
29 s = Student(‘Sw‘,18,88)
30 
31 t.tell()
32 s.tell()