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Wed Aug 17 22:46:27 CEST 2005 · http://mail.python.org/pipermail/python-dev/2005-August/055487.html

[me]
> > A more useful relationship is
> >
> >     name in dir(x) <==> getattr(x, name) is valid

[Raymond]
> That would be a useful invariant.

Well, the <== part can't really be guaranteed due to the existence of
__getattr__  overriding (and all bets are off if __getattribute__ is
overridden!), but apart from those, stripping non-strings in dir()
would be a big help towards making the invariant true. So I'm +1 on
that.

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)

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