[GRASS-user] script in python

[Gabriele Nolè]

Hi.
I'm trying to write a little script in python but I have difficulty (I know
a bit the bash).
The script must first run a buffer and then some overlay.	
I am following the wiki and seeing some script as v.type.py, color_table.py
etc. ..
Now I am at this point:

#!/usr/bin/env python
############################################################################
import sys
import os
import grass
import commands

#%module
#% description: rischio 
#%end

#%option
#% key: vect_1
#% type: string
#% required: yes
#% multiple: no
#% key_desc: name
#% description: Name of input vector map (centro urbano)
#% gisprompt: old,vector,vector
#%end
#
#%option
#% key: vect_2
#% type: string
#% required: yes
#% multiple: no
#% key_desc: name
#% description: Name of input vector map (uso del suolo)
#% gisprompt: old,vector,vector
#%end
#
#%option
#% key: vect_3
#% type: string
#% required: yes
#% multiple: no
#% key_desc: name
#% description: Name of input vector map (pendenza-classi)
#% gisprompt: old,vector,vector
#%end

def main():
	 #add your code here
    print ""
    print "Value of GIS_OPT_vect_1: %s" % os.getenv("GIS_OPT_vect_1")
    print "Value of GIS_OPT_vect_2:  %s" % os.getenv("GIS_OPT_vect_2")
    print "Value of GIS_OPT_vect_3:    %s" % os.getenv("GIS_OPT_vect_3")
	
    grass.run_command('v.buffer', input = vect_1 output = buffer_200m buffer
= 200)
   # or grass.exec_command ?

       #end of your code
         

if __name__ == "__main__":
    args = ""
    for arg in sys.argv:
        args += arg+" "
    try:
        if ( sys.argv[1] != "@ARGS_PARSED@" ):
            os.system("g.parser %s " % (args))
    except IndexError:
        os.system("g.parser %s" % (args))

    if sys.argv[1] == "@ARGS_PARSED@":
        main(); 

Thanks
Gabriele
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