[GRASS-dev] Fwd: [GRASS-user] How to embed a grass script (for example v.db.addcol) into a Pythonscript on windows?

[Glynn Clements]

Michael Barton wrote:

> A couple of students are trying to run python in wingrass now, following
> your directions below. They installed python, but we're not sure where
> to put #4 in your steps.
> 
> >> 4. PYTHONPATH needs to be set to %WINGISBASE%\etc\python
> 
> 
> It seems like it ought to go into the "grass64svn" initialization file
> 
> That file has the following lines...
> 
> PYTHONPATH="$GISBASE/etc/python:$GISBASE/Python25:$PYTHONPATH"
> export PYTHONPATH
> PYTHONHOME="C:\Program Files\GRASS-64-SVN\Python25"
> 
> Does it go there? With quotes? What about changing PYTHONHOME?

PYTHONPATH should be in Windows format. I don't know whether MSys will
convert it or not, but I wouldn't rely upon it.

PYTHONHOME shouldn't need to be set provided that Python was installed
correctly (i.e. using the .msi file from python.org). If you're doing
something else (e.g. trying to use a version of Python "bundled" with
GRASS), then I haven't got a clue.

FWIW, the following batch file works fine for me, with GRASS built
from source and installed with "make install" (i.e. no "installer" or
modifications to the startup files):

set PATH=C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\GnuWin32\bin;C:\msys\1.0\local\bin;C:\Program Files\Python25
set GRASS_PYTHON=C:\Program Files\Python25\python.exe
set GRASS_WISH=wish84
set GRASS_SH=C:\msys\1.0\bin\sh.exe
"C:\Program Files\GRASS-6.5svn\grass65.bat" -text

Note: -text can be replaced with -tcltk or -wxpython; all work.

However, within GRASS, I also need:

set PYTHONPATH=%WINGISBASE%\etc\python

as init.bat only sets this if you start with -wxpython.

-- 
Glynn Clements <glynn at gclements.plus.com>