super

#_*_coding:utf-8_*_
__author__='Wesley'
class Vehicle:
    Country='China'
    def __init__(self,name,speed,load,power):
        self.name=name
        self.speed=speed
        self.load=load
        self.power=power
    def run(self):
        print("running")
class SubWay(Vehicle):
    def __init__(self,name,speed,load,power,line):
        # Vehicle.__init__(self,name,speed,load,power)
        super(SubWay,self).__init__(name,speed,load,power)  #使用父类方法初始化
        self.line=line
    def run(self):
        print('di tie %s huan ying '%self.line)
        # Vehicle.run(self)      #不知道self是谁，所以需要self 参数
        super(SubWay,self).run()          #调用父类的方法，self是line13,所以run不再需要self了，已经知道self是谁，没必要重复
line13=SubWay("CHina sub",'180lm','10000','dian',13)
line13.run()