类的继承规则
class Su:
born_city = 'Jiangsu'
wearing = 'thick'
def diet(self):
print('我们爱吃甜。')
class Yue:
settle_city = 'Guangdong'
wearing = 'thin'
def diet(self):
print('我们吃得清淡。')
class Yuesu(Yue,Su):
pass
xiaoming = Yuesu()
# 先在 Yue类找,(因为Yue靠左,优先找)找到了,打印出来。
print(xiaoming.wearing)
# Yue类没有born_city,才去Su类找。
print(xiaoming.born_city)
# 方法调用,和属性调用一样,也符合就近原则。
xiaoming.diet()
小结一下代码中体现的就近原则:越靠近子类(即越靠左)的父类,越亲近,越优先考虑。子类调用属性和方法时,会先在靠左的父类里找,找不到才往右找。