python 面向对象_1

self 

#self 是相当于c++的 this指针
class Ball:
    def setName(self,name):
        self.name = name
    def kick(self):
        print('我叫%s'%self.name)

ball = Ball()
ball.setName('足球')
ball.kick()
ball1 = Ball()
ball1.setName('篮球')
ball1.kick()

class Ball1:
    def __init__(self,name,id='xxx'):#构造函数，初始化实例对象的时候 会自动调用
        self.name = name
        self.id = id
    def kick(self):
        print('我叫%s,我是世界第%s大球'%(self.name,self.id))
b = Ball1('排球','三')
b.kick()