在Python中使用Properties会导致"超出最大递归深度"

Question

这是我编写的一个测试类,用于熟悉Python脚本中的功能@properties和setter功能:

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,当我想从我的类创建一个对象时,我面临以下错误:

>>> 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
>>> 

Answer 1

您对getter,setter和attribute使用相同的名称.设置属性时,必须在本地重命名该属性; 惯例是在它前面添加下划线.

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

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