python，学校成员类的例子，老师和学生（python class父类与子类之间的联系与逻辑）

python语言的编辑文本的格式比较严格，即使语法正确，格式不对，则无法运行出结果，需要自己不断的摸索、实践才可熟练掌握：# -*- coding: utf-8 -*-
# Filename:SchoolMember.py

class SchoolMember:
sum_member=0
def __init__(self,name):
self.name=name
SchoolMember.sum_member+=1
print "学校新加入一个成员:%s" %self.name
print "现在有成员%d人" % SchoolMember.sum_member
def say_hello(self):
print"大家好，我叫:%s"% self.name
def __del__(self):
SchoolMember.sum_member-=1
print "%s离开了，学校还有%d人"%(self.name,SchoolMember.sum_member)
class Teacher(SchoolMember):
def __init__(self,name,salary):
SchoolMember.__init__(self,name)
self.salary=salary
def say_hello(self):
SchoolMember.say_hello(self)
print "我是老师，我的工资是：%d" % self.salary
def __del__(self):
SchoolMember.__del__(self)

class Student(SchoolMember):
def __init__(self,name,mark):
SchoolMember.__init__(self,name)
self.mark=mark
def say_hello(self):
SchoolMember.say_hello(self)
print "我是学生，我的成绩是： %d" % self.mark
def __del__(self):
SchoolMember.__del__(self)
t=Teacher("老黄",3000)
t.say_hello()
s=Student("xiao",78)
s.say_hello()



运行结果如下: