类的继承

# 类的继承
class Car:
    def __init__(self,name):
        self.name = name
        self.remain_miles = 0

    def fill_fule(self,miles): #填充燃料
        self.remain_miles = miles

    def run(self,miles): #跑了多少公里
        print(self.name,end=':')
        if self.remain_miles > miles:
            print('run %d miles'%(miles))
        else:
            print('fule is out!')

class GasCar(Car):
    def fill_fule(self,gas): #填充燃料
        self.remain_miles = gas * 6

class EleCar(Car):
    def fill_fule(self,power):
        self.remain_miles = power * 3


# ******** 以下是类的调用 **************

gascar = GasCar('BMW')
gascar.fill_fule(60)
gascar.run(200)

elecar = EleCar('Tesla')
elecar.fill_fule(60)
elecar.run(200)