Python 属性装饰器不起作用，为什么? [英] Python property decorator not working, why?

问题描述

由于某种原因，'obj._max_value' 和 'obj._current_value' 没有被设置.我看过很多教程，似乎我做对了.有谁知道为什么它不起作用?

For some reason the 'obj._max_value' and 'obj._current_value' are not getting set. I have looked at many tutorials and it seems that I am doing it correctly. Does anyone know why it is not working?

见代码:https://gist.github.com/matthew-campbell/5561562

(Python 2.7)

(Python 2.7)

更新:

class Progress():

  @property
  def progress_bar_length(self):
    return self._progess_bar_length

  @progress_bar_length.setter
  def progress_bar_length(self, length):
    self._progress_bar_length = length

  @progress_bar_length.deleter
  def progress_bar_length(self):
    del self.progress_bar_length

推荐答案

property 装饰器不适用于旧式类.从 object 继承您的类以获得新样式的类:

The property decorator doesn't work with old-style classes. Inherit your class from object to get a new-style class:

class Progress(object):
    # ...

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