[GRASS-user] GRASS, ArcGIS, and Python incompatibilties

[gene]

at work, we use ArcGIS (Python 2.6), GRASS GIS (Python 2.7) QGIS (Python 2.7)
and a standard Python (version 2.5) installed on Windows XP without problem
(in the Windows Registry, only Python 2.5 and the Python 2.6 of ArcGIS) 

*Arcpy*
- has no wxPython module:
  >>> import wx
   Runtime error <type 'exceptions.ImportError'>: No module named wx
  >>> from wxPython.wx import *
  Runtime error <type 'exceptions.ImportError'>: No module named wxPython.wx
  >>> from wxPython import *
  Runtime error <type 'exceptions.ImportError'>: No module named wxPython

- but we can use modules of Python 2.5 (without dlls...)
  >>> import subprocess
  >>> argument= str(geom)
  >>> trait =
subprocess.Popen(['C:/Python25/python.exe','d:/test/testshapely.py',argument],
stdout=subprocess.PIPE)
 >>> wkt= trait.stdout.read()
 >>> print wkt 
'LINESTRING (232278.9235196237900000....

*QGIS or GRASS GIS*
The same thing is true (see 
http://www.portailsig.org/content/qgis-lancer-des-scripts-python-ou-des-commandes-shell-depuis-la-console-python-ou-avec-scrip
http://www.portailsig.org/content/qgis-lancer-des-scripts-python-ou-des-commandes-shell-depuis-la-console-python-ou-avec-scrip
, in French)

When we try to use Arcpy in GRASS GIS or QGIS, the error message is
  import sys
  sys.path.append('C:\\Program Files\\ArcGIS\\Desktop10.0\\arcpy\\')
  sys.path.append('C:\\Program Files\\ArcGIS\\Desktop10.0\\Bin\\')
  import arcpy
  Traceback (most recent call last):
 ....
  *ImportError: Module use of python26.dll conflicts with this version of
Python*.

same thing if i use subprocess.Popen

If i do the same thing in ArcPy
    sys.path.append('C:\\Program Files\\GRASS
6.4.2\\Python27\\Lib\\site-packages')
    import wx
    Traceback (most recent call last):
    ...
    *ImportError: Module use of python27.dll conflicts with this version of
Python*.


so i do not think that the problem comes from the different versions of
Python
 



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