类属性增删改查

dir同样可以查找实例的属性字典

print(dir(p1))

下面是增删改查举例：

class chinese:
    country='中国'
    def __init__(self,name):
        self.name=name
    def play_ball(self,ball):
        print('%s正在打%s' %(self.name))
print(chinese.country）   '查看’

chinese.country='russian'   '修改'

chinese.fuse='黄色'  '增加'

del chinese.fuse  '删除‘

def eat_food(self,food):
    pass
chinese.food=eat_food   '增加函数属性’

def test(self):
    pass
chinese.play_ball=test   '修改函数属性'