[Python-Dev] __dir__, part 2

Georg Brandl g.brandl at gmx.net
Sat Nov 11 11:21:08 CET 2006

Fredrik Lundh wrote:
> Guido van Rossum wrote:
>> No objection on targetting 2.6 if other developers agree. Seems this
>> is well under way. good work!
> given that dir() is used extensively by introspection tools, I'm
> not sure I'm positive to a __dir__ that *overrides* the standard
> dir() behaviour.  *adding* to the default dir() list is okay, re- 
> placing it is a lot more questionable.

If the new default __dir__ implementation only yields the same set
of attributes (or more), there should be no problem.

If somebody overrides __dir__, he knows what he's doing. He will most
likely do something like "return super.__dir__() + [my, custom, attributes]".


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