一个有关 Python , metaclass 的问题。详细看 gist - V2EX
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baocaixiong

一个有关 Python , metaclass 的问题。详细看 gist

  •  
  •   baocaixiong Aug 14, 2014 2861 views
    This topic created in 4276 days ago, the information mentioned may be changed or developed.


    我这里是想实现在 import 包的时候将 class 中的用户定义的属性保存在 class 中的`__standards__`属性中,供后面调用
    3 replies    2014-08-14 15:26:57 +08:00
    timonwong
        1
    timonwong  
       Aug 14, 2014   1
    原因很简单,要知道 dict() 是mutiple 的,而且你给了它一个 instance:
    {_STANDARDS: dict()}
    baocaixiong
        2
    baocaixiong  
    OP
       Aug 14, 2014
    已经弄明白了。

    33 行 StdData = _StdData('StdData', (StdData,), {_STANDARDS: dict()})
    dict() 这里始终是同一个dict()
    baocaixiong
        3
    baocaixiong  
    OP
       Aug 14, 2014
    @timonwong 感谢。
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