[GRASS-user] Grass 6.4 & python.

[Milton Cezar Ribeiro]

Hi Glym,

Thanks for the reply. I have tryed on two ways, both not work for me (under
windows vista).
1) start msys; start grass without -mx ; and try to start python from inside
grass sesssion. The python keep stoped (no error message, but stay with only
"python" words on the console)

2) start msys; try to start grass -mx
here I get the following error:
GRASS 6.4.0RC4 > grass65 -wx
Cleaning up temporary files ...
Starting GRASS ...
'import site' failed; use -v for traceback
Traceback (most recent call last):
  File "c:/OSGeo4W/apps/grass/grass-6.5.svn/etc/wxpython/gis_set.py", line
23, in <module>
    import os
ImportError: No module named os
Error in GUI startup. If necessary, please
report this error to the GRASS developers.
Switching to text mode now.
Hit RETURN to continue..

Any help are welcome.

Bests

milton


2009/4/29 Glynn Clements <glynn at gclements.plus.com>

>
> Milton Cezar Ribeiro wrote:
>
> > I started grass under Msys and with the flag -wx.
> > My difficult now I how can I get starting, with a simple example, like
> > these on the grass-python page:
>
> > My question is how can I make python find the "grass" to run the import.
> > I need to start python inside a MSYS -> GRASS session, like R do?
>
> In order to find grass.py, PYTHONPATH needs to include
> $GISBASE/etc/python. This is done automatically when you start GRASS.
>
> However, the functions in grass.py run GRASS commands, and so require
> the usual GRASS environment (GISBASE, GISRC, etc). So you need to
> either run the Python script from within a GRASS session, or set up
> the GRASS environment by some other means.
>
> If you want to write a stand-alone program, you could always have the
> Python script set up the GRASS environment, e.g. from registry keys
> (or if this is for your own use, just hard-code everything). You can
> add directories to the path used for importing Python modules by
> modifying sys.path, e.g.:
>
>        import sys
>        ...
>        gisbase = os.normpath(os.environ['GISBASE'])
>        pydir = os.path.join(gisbase, "etc", "python")
>        sys.path.append(pydir)
>
> You still need to figure out how to determine the database, location,
> and mapset, though.
>
> --
> Glynn Clements <glynn at gclements.plus.com>
>
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