父类名 . __init__(self, ...)
可以将父类中的init中的属性重复调用，减少代码的重复
class Vehicle:
def __init__(self, name, speed, load, power):
self.name = name
self.speed = speed
self.load = load
self.power = power
def run(self):
print('%s我开动啦'%self.name)
class Subway(Vehicle):
def __init__(self,name, speed, load, power,line):
Vehicle.__init__(self, name, speed, load, power)
self.line = line
def show_info(self):
print(self.name, self.line)
line1 = Subway('郑州地铁', '30m/s','500','电', '1号')
line1.show_info() #调用自身的方法
line1.run() #调用父类中的类方法
父类名 . 函数名（self）
子类中调用父类中类方法的逻辑
class Vehicle:
def __init__(self, name, speed, load, power):
self.name = name
self.speed = speed
self.load = load
self.power = power
def run(self):
print('%s我开动啦'%self.name)
class Subway(Vehicle):
def __init__(self,name, speed, load, power,line):
Vehicle.__init__(self, name, speed, load, power)
self.line = line
def show_info(self):
print(self.name, self.line)
def run(self):
Vehicle.run(self) #加上这句，可以实现同名函数，调用父类中的逻辑
print('%s我来自子类'%self.line)
line1 = Subway('郑州地铁', '30m/s','500','电', '1号线')
line1.show_info() #调用自身的方法
line1.run()
super 方法
调用父类逻辑时，不用担心类名的变动
class Vehicle:
def __init__(self, name, speed, load, power):
self.name = name
self.speed = speed
self.load = load
self.power = power
def run(self):
print('%s我开动啦'%self.name)
class Subway(Vehicle):
def __init__(self,name, speed, load, power,line):
# Vehicle.__init__(self, name, speed, load, power)
super().__init__(name, speed, load, power) #super 方法，这样就不用担心类名被修改
self.line = line
def show_info(self):
print(self.name, self.line)
def run(self):
# Vehicle.run(self) #加上这句，可以实现同名函数，调用父类中的逻辑
super().run() #效果和上面代码一样，更适合
print('%s我来自子类'%self.line)
line1 = Subway('郑州地铁', '30m/s','500','电', '1号线')
line1.show_info() #调用自身的方法
line1.run() #调用父类中的类方法
super().__init__(name, speed, load, power) 等同于：
super(Subway, self).__init__(name, speed, load, power)