面向对象.类的继承
1.子类可以继承一个或是多个父类,子类继承父类的所有公有实例属性和方法
2.继承实现了代码的重用以及个性化定制,减少代码量
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
#
# Authors: limanman
# OsChina: http://my.oschina.net/pydevops/
# Purpose:
#
"""
import pprint
import random
# 学校类
class School(object):
"""
Attributes:
student_list: school student list
teacher_list: school teacher list
"""
def __init__(self):
# 学生列表
self.student_list = []
# 老师列表
self.teacher_list = []
# 学生/老师公有类
class SchoolMember(object):
"""
Attributes:
name: school member name
age : school member age
sex : school member sex
"""
# 公有实例属性
def __init__(self, name, age, sex):
self.name = name
self.age = age
self.sex = sex
class Student(SchoolMember):
"""
Attributes:
grade: student grade
"""
def __init__(self, name, age, sex, school, grade):
# 父类初始化
SchoolMember.__init__(self, name, age, sex)
self.grade = grade
# 避免外部恶意调用(学生炸学校)
self.__school = school
# 学生入学校
self.__school.student_list.append(self)
def stu_study(self):
print '''\
name : %s
age : %s
sex : %s
doing: %s
''' % (self.name, self.age, self.sex, 'study...')
# 学生转校同步到学校
def stu_transfer(self):
"""Student transfer to other school."""
self.__school.student_list.remove(self)
class Teacher(SchoolMember):
"""
Attributes:
salary: teacher salary
"""
def __init__(self, name, age, sex, school, salary):
# 父类初始化
SchoolMember.__init__(self, name, age, sex)
self.salary = salary
# 避免外部恶意调用(老师炸学校)
self.__school = school
self.__school.teacher_list.append(self)
def tch_teaching(self):
print '''\
name : %s
age : %s
sex : %s
doing: %s
''' % (self.name, self.age, self.sex, 'teach...')
# 老师转校同步到学校
def tec_transfer(self):
"""Teacher transfer to other school."""
self.__school.teacher_list.remove(self)
def formated_show(header, cur_list):
"""Formated show students/teachers info.
Args:
header : print header info
cur_list: student/teacher list
"""
print '==> %s' % (header)
for cur_item in cur_list:
last_attr = getattr(cur_item, 'grade', None) or getattr(cur_item,
'salary',
None)
print (getattr(cur_item, 'name', None),
getattr(cur_item, 'age', None),
getattr(cur_item, 'sex', None), last_attr)
if __name__ == '__main__':
# 学生注册
cur_school = School()
for i in xrange(2):
name = 'user_%s' % i
age = 20 + i
sex = random.choice(('Man', 'Woman'))
grade = random.randint(60, 100)
Student(name, age, sex, cur_school ,grade)
Teacher(name, age, sex, cur_school ,10000)
# 当前人数
formated_show('Student', cur_school.student_list)
formated_show('Teacher', cur_school.teacher_list)
# 学生转校
cur_school.student_list[0].stu_transfer()
# 老师转校
cur_school.teacher_list[0].tec_transfer()
# 转校后的
formated_show('Student', cur_school.student_list)
formated_show('Teacher', cur_school.teacher_list)