I haven't any experience yet with ArcGIS 10, but the ArcGIS 9.3 installation sets PYTHONPATH in the environment (which a normal Python installation doesn't do). This can have unexpected side effects such as even a separate Python installation picking up modules from the ArcGIS Python installation (zlib being a particular example I am familiar with).
You may find that you need to do some environment manipulation...
The batch file I use to run Python 2.7 on my machine (with ArcGIS using Python 2.5) is:
---8<---8<---
@echo off
setlocal
set PYTHONPATH=
c:\python27\python.exe %*
endlocal
---8<---8<---
Andrew.
-------------------------> "These thoughts are mine alone!" <---------
Andrew MacIntyre Operations Branch
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Message: 6
Date: Thu, 28 Jun 2012 15:02:08 -0600
From: Michael Barton <Michael.Barton@asu.edu>
To: grass-dev@lists.osgeo.org, grass-user grass-user
<grass-user@lists.osgeo.org>
Cc: Helena Mitasova <hmitaso@ncsu.edu>, Kevin Sampson
<ksampson@ucar.edu>
Subject: [GRASS-user] GRASS, ArcGIS, and Python incompatibilties
Message-ID: <EDC17B04-502D-43F7-A015-A1DB32418570@asu.edu>
Content-Type: text/plain; charset="us-ascii"I thought I'd seen this somewhere on the list, but I can't seem to find it. If
there is a posted answer, perhaps someone could point me to it. Otherwise,
hopefully, someone can offer an answer.I'm working with a colleague who has Windows 7 and ArcGIS installed. He
installed GRASS for Windows, but it won't launch due to some combination
of Python/wxPython incompatibility. We're pretty sure that it has to do with
the version of Python he had to install with ArcGIS. The ArcGIS Python is 2.6,
but GRASS for Windows comes with Python 2.7. Is there some configuration
setting to get around this?
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