[GRASS-user] Re: [GRASS-windows] WinGRASS Python 2.7

Johannes Radinger JRadinger at gmx.at
Fri Sep 2 03:47:32 EDT 2011

Hello again!

As recommended I did the changes.
I just tried to first disable the PYTHONHOME and
GRASS_PYTHON. The lines in the env.bat file are now:

rem Path to the python directory
rem set PYTHONHOME=%GISBASE%\Python25
rem if "x%GRASS_PYTHON%" == "x" set GRASS_PYTHON=python

is that correct?

I tried at this step to start GRASS but it doesn't work
anymore. Nothing is started!! So it seems that this isn't
working! Maybe I have to set the path to python.org in the
env.bat, but I don't know how the lines should look like.

What to do next? Is that a kind of bug in the WinGRASS version?


-------- Original-Nachricht --------
> Datum: Thu, 1 Sep 2011 20:49:21 +0100
> Von: Glynn Clements <glynn at gclements.plus.com>
> An: "Johannes Radinger" <JRadinger at gmx.at>
> CC: grass-user at lists.osgeo.org, grass-windows at lists.osgeo.org
> Betreff: Re: [GRASS-user] Re: [GRASS-windows] WinGRASS Python 2.7

> Johannes Radinger wrote:
> > > How did you set GRASS_PYTHON?
> > > 
> > > AFAIK, it's set in %GISBASE%\etc\env.bat; this will override any
> > > global setting.
> > 
> > 
> > I set the environmental variables in the environment settings in the
> > system properties as I was told some months ago here in the mailing
> > list.
> Ah; GRASS_PYTHON is only set in env.bat if it isn't already set. 
> PYTHONHOME and PATH are set unconditionally.
> > Anyway I found the env.bat file. It contains besides others following
> > lines:
> > 
> > rem Path to the python directory
> > set PYTHONHOME=%GISBASE%\Python25
> > if "x%GRASS_PYTHON%" == "x" set GRASS_PYTHON=python
> > 
> > 
> > What exactly should be changed there and how should i look like? As I
> > said before, the Python I want to be used is C:\Python27\python.exe. 
> > As it is set in the environemntal variables do I just need to delete
> > it from the env.bat or what shoul I do exactly?
> The above should only set GRASS_PYTHON if it isn't already set. 
> However, the env.bat file also sets PATH, which may cause the bundled
> version to be used in some cases.
> If you want to use a system version of Python, I'd suggest disabling
> the PYTHONHOME and GRASS_PYTHON settings in env.bat, and removing or
> renaming any python.exe/pythonw.exe from the extrabin directory.
> The original reason for bundling Python was that the GUI included a
> couple of binary components (vdigit and nviz), which would only work
> with the specific version of Python against which they were built. 
> Those components have since been removed, but currently we don't have
> anyone who is able and willing to fix the Window installer.
> -- 
> Glynn Clements <glynn at gclements.plus.com>
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user

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