第52天学习python 子类调用父类方法

Posted 2020-11-15 坚持是多么伟大的事情

#子类中调用父类
#初步程序
# class Vehicle:#定义交通工具
#     Country="China"
#     def __init__(self,name,speed,load):
#         self.name=name
#         self.spedd=speed
#         self.load=load
#
#     def run(self):
#         print("开动了")
#
# class Subway(Vehicle):#定义个地铁
#     def __init__(self,name,speed,load,line):
#         self.name=name
#         self.spedd=speed
#         self.load=load
#         self.line=line
#
#     def show_info(self):
#         print(self.name,self.line)
#
# line13=Subway("北京地铁","100m/s","1000","13")
#
# line13.show_info()
#
# #子类调用父类
# class Vehicle:#定义交通工具
#     Country="China"
#     def __init__(self,name,speed,load):
#         self.name=name
#         self.spedd=speed
#         self.load=load
#
#     def run(self):
#         print("开动了")
#
# class Subway(Vehicle):#定义个地铁
#     def __init__(self,name,speed,load,line):
#         Vehicle.__init__(self,name,speed,load)#引用父类的属性
#         self.line=line
#     def show_info(self):
#         print(self.name,self.line)
#
#     def run(self):
#         Vehicle.run(self)#引用父类的函数属性
#         print("%s  %s x线"%(self.name,self.line))
#
# line13=Subway("北京地铁","100m/s","1000","13")
#
# line13.show_info()
# line13.run()

# 以上问题出现修改父类名称后面的都需要修改比较麻烦

# 下面使用supper来解决上面问题：不用传self参数  和 修改父类名其他不用改
class Vehicle1:#定义交通工具
    Country="China"
    def __init__(self,name,speed,load):
        self.name=name
        self.spedd=speed
        self.load=load

    def run(self):
        print("开动了")

class Subway(Vehicle1):#定义个地铁
    def __init__(self,name,speed,load,line):
        super().__init__(name,speed,load)#通过super的方法直接调用父类属性
        self.line=line
    def show_info(self):
        print(self.name,self.line)

    def run(self):
        super().run()#不用传自己的self
        print("%s  %s x线"%(self.name,self.line))

line13=Subway("北京地铁","100m/s","1000","13")

line13.show_info()
line13.run()