Python--类的创建与继承

#-*- coding:GBK -*-
#-*- coding:utf-8 -*-

'''

Created on 2017年7月16日

@author: Administrator
'''
class Dog:
num = 0
def __init__(self,name):
'''initialize the data'''
    self.name = name
    print('initial %s'%self.name) 
def __del__(self):
'''%s said bye'''
    print('%s said bye'%self.name)
    def HowMany(self):
'''print the current number of dog'''
def SayHi(self):
    print('hello ,I\'m a lovely %s dog '%self.name)
def eat(self):
    print('%s likes eating.'%self.name)
class Tian(Dog):
    def __init__(self,name,speed):
        Dog.__init__(self, name)
        self.speed = speed
        print('initialize %s'%self.name)
    def run(self):
        print('speed is %d km/h'%self.speed)
class Jiwawa(Dog):
    def __init__(self,name,height):
        Dog.__init__(self, name)
        self.height = height
        print('initialize %s'%self.name)
    def run(self):
        print('%s can run '%self.name)
dog = Dog('lucky')
dog.SayHi()
dog.HowMany()
dog.eat()
print('--->')
tianyuan = Tian('田园',30)
tianyuan.SayHi()
tianyuan.HowMany()
tianyuan.eat()
tianyuan.run()
print('--->')
jiwawa = Jiwawa('吉娃娃',20)
jiwawa.SayHi()
jiwawa.HowMany()
jiwawa.eat()
jiwawa.run()

注：

子类在定义初始化的时候，应先将所继承的父类先初始化，否则会报错