[GRASS-user] Re: Using shell and perl scripts via a python script in windows, or better change to Linux?

[sonja1]

Maybe I gave up to early, but my solution is the change to Linux. 
I finally got my python scripts, which call the Geomhydas shell and perl
scripts, to work.
I wrote some documentation:

How to run Python/Shell/Perl scripts in combination with Grass under Linux
(here tested for Debian)


1.	Install Grass6.4 for the corresponding Linux version
2.	Install Python2.6


Scripts Geo-Mhydas (in Perl and Shell)
-	create folder segmentation in home/user/
-	give you administrator rights in this folder
-	copy the scripts inside this folder

Environment variables to set:
The following paragraph has to be added at the end of the file .bashrc
(which is located as hidden file in home/user/. A hidden file can be seen
and modified in an editor à open à right click in this window à mark show
hidden files)
Then edit: 

export GISBASE=usr/lib/grass64
export
PATH=$PATH:/home/user/segmentation:/$GISBASE/bin:/$GISBASE/scripts:/$GISBASE/etc:/$GISBASE/lib:/usr/lib/python2.5:/$GISBASE/etc/python/grass:/$GISBASE/etc/python/grass/lib:/$GISBASE/etc/python/grass/script
export GISRC=$HOME/.grassrc6
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$GISBASE/lib
export PYTHONPATH=$GISBASE/etc/python
export PYTHONLIB=/usr/lib/python2.5

export GIS_LOCK=$$

Replace user with your user name. 
Linux has to be restarted in order to consider these variables.
You can check if the variables are right in the terminal with:

echo $PATH 

The variables should contain the values shown above. $GISBASE is a variable,
if it is not recognised correctly, just replace it by its value in the
following variables. 

Once restarted you can start Grass via the terminal with the command 
grass64.

The Python scripts should look as follows and have to contain the first
line.

#!usr/bin/env python

import grass.script as grass

'''Affiche le contenu du mapset'''
'''Display the mapset'''
env = grass.gisenv()
print env
vectors = grass.read_command("g.list", type='vect')
print vectors

filvoirie=raw_input("Please enter the name of the input vector (line) file :
")
grass.run_command("m.disline", input=filvoirie, output='filvoirie_disline',
length='10',overwrite=True)

Save the script as script.py

Here m.disline is a combination of shell and perl scripts of Geo-Mhydas. 

To run the python script go to your terminal where you started Grass.

Type python /location of script/script.py

And watch your program execute!

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