在Python类中使用属​​性会导致“超过最大递归深度”。 [英] Using Properties in Python classes cause "maximum recursion depth exceeded"

问题描述

这是我编写的测试类，它熟悉Python脚本中的 @properties 和 setter 功能：

Here is a test class that I wrote to became familiar with @properties and setter functionality in Python script:

class Test(object):
    def __init__(self, value):
        self.x =  value
    @property
    def x(self):
        return self.x
    @x.setter
    def x(self, value):
        self.x = value

问题是，当我想从类中创建对象时，我会遇到以下错误：

The problems is that when I want to create an object from my class, I face the following error:

>>> t = Test(1)

Traceback (most recent call last):
  File "<pyshell#19>", line 1, in <module>
    t = Test(1)
  File "<pyshell#18>", line 3, in __init__
    self.x =  value
  File "<pyshell#18>", line 9, in x
    self.x = value
  File "<pyshell#18>", line 9, in x
  #A bunch of lines skipped
RuntimeError: maximum recursion depth exceeded
>>> 

推荐答案

您正在为getter，setter使用相同的名称和属性。设置属性时，必须在本地重命名属性；

You are using the same name for the getter, setter and attribute. When setting up a property, you must rename the attribute locally; the convention is to prefix it with an underscore.

class Test(object):
    def __init__(self, value):
        self._x =  value

    @property
    def x(self):
        return self._x

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