class Dog number = 4 def __init__self name color selfname = name selfcolor = colordog1 = Dog泰迪 棕色dog2 = Dog阿拉斯加 花色printdog2name + 的颜色是 + dog2colorprintDognumberDognumber = 20Dogpri

判断dog1的颜色属性是否存在：hasattr(dog1, "color")

返回dog1颜色属性值：dog1.color

添加dog2颜色属性值为浅灰：dog2.color = "浅灰"

打印dog2的颜色：print(dog2.color)

删除dog1的color属性：del dog1.color

再次判断dog1的color是否存在：hasattr(dog1, "color")