使用Python覆盖属性

如何在Python中覆盖属性的getter

我试着做：

class Vehicule(object):

    def _getSpatials(self):
        pass

    def _setSpatials(self, newSpatials):
        pass

    spatials = property(_getSpatials, _setSpatials)

class Car(Vehicule)

    def _getSpatials(self):
        spatials = super(Car, self).spatials()
        return spatials

但是getter调用的是车辆而不是汽车的方法

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我应该更改什么？

这可能会有所帮助：

看起来您希望汽车的空间属性的getter调用Vehicleue的 空间属性的getter。你可以通过

class Vehicule(object):
    def __init__(self):
        self._spatials = 1
    def _getSpatials(self):
        print("Calling Vehicule's spatials getter")
        return self._spatials
    def _setSpatials(self,value):
        print("Calling Vehicule's spatials setter")        
        self._spatials=value
    spatials=property(_getSpatials,_setSpatials)

class Car(Vehicule):
    def __init__(self):
        super(Car,self).__init__()
    def _getSpatials(self):
        print("Calling Car's spatials getter")
        return super(Car,self).spatials
    spatials=property(_getSpatials)

v=Vehicule()
c=Car()
print(c.spatials)
# Calling Car's spatials getter
# Calling Vehicule's spatials getter
# 1

另一方面，从汽车的设定器内部调用汽车的设定器更加困难。 显而易见的事情是行不通的：

class Car(Vehicule):
    def __init__(self):
        super(Car,self).__init__()
    def _getSpatials(self):
        print("Calling Car's spatials getter")
        return super(Car,self).spatials
    def _setSpatials(self,value):
        print("Calling Car's spatials setter")
        super(Car,self).spatials=value
    spatials=property(_getSpatials,_setSpatials)

v=Vehicule()
c=Car()
print(c.spatials)
c.spatials = 10
AttributeError: 'super' object has no attribute 'spatials'

相反，诀窍是调用

super（Car，self）。\u setspaces

：

class Car(Vehicule):
    def __init__(self):
        super(Car,self).__init__()
    def _getSpatials(self):
        print("Calling Car's spatials getter")
        return super(Car,self).spatials
    def _setSpatials(self,value):
        print("Calling Car's spatials setter")
        super(Car,self)._setSpatials(value)
    spatials=property(_getSpatials,_setSpatials)

v=Vehicule()
c=Car()
print(c.spatials)
# Calling Car's spatials getter
# Calling Vehicule's spatials getter
# 1
c.spatials = 10
# Calling Car's spatials setter
# Calling Vehicule's spatials setter
print(c.spatials)
# Calling Car's spatials getter
# Calling Vehicule's spatials getter
# 10

---

如果我们可以使用

vehicle

而不是

super（Car，self）

，这个问题就会容易得多。使用

super

是命令式的吗？你是什么意思？你能给我举个例子吗？我正在使用Google App Engine，Python 2.5不支持@spatials.setter语法。@Pierre:哦，好的，我将更改我的答案以使用旧语法。谢谢你。如果你想在getter中使用参数，你可以在汽车的getter中使用super（Car，self）。\u getSpatials（params）。