[IPython-user] Re: IPython install under Win2000
Fernando.Perez at colorado.edu
Sun Jul 17 21:38:41 CDT 2005
Alan G Isaac wrote:
> But os.environ['HOME'] == '%USERPROFILE%' which you do not
> Again, I have seen this problem arise before, so I do not
> think my problem is unique. In any case, it can be fixed by
> a small change:
> if os.environ['HOME']=='%USERPROFILE%':
> return os.environ['USERPROFILE']
> else: return os.environ['HOME']
Well, the fix is easy enough to apply. However, it smells a bit fishy to me:
why would an environment variable resolve to something else which needs to be
re-expanded? I know that under Windows all kinds of bizarre things are
considered normal, but this I find a bit odd. Environment variables are, at
least in my mind, end-values which should be usable as-is.
So I'd like to hear from those with Win32 expertise if this is really standard
practice in the win32 world I should code defensively against. And if so, is
one level of re-evaluation enough? Can %USERPROFILE% itself point to
%SOMETHINGELSESTILL%? Should I keep expanding all %XXX% forms?
Some guidance from the win32 gurus would be much appreciated here on what the
proper approach to follow should be.
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