See the notes and output sections of the g.findfile manpage. There you can find 
additional information how to use the comand in scripts.
http://grass.fbk.eu/gdp/html_grass64/g.findfile.html

Christian.


From: Helena Herrera 
Sent: Monday, September 27, 2010 12:47 PM
To: Christian Schwartze ; grass-user@lists.osgeo.org 
Subject: Re: [GRASS-user] Python Script- Check if a raster exists


Uhm. I have tried that one with  
g.findfile element=raster file=L (I have a raster map named L in my mapset) and 
I get:
name=
mapset=
fullname=
file=
Which would mean that it doesn't exist.


is there any other way to do this for GRASS-pythons scripts?


On Mon, Sep 27, 2010 at 11:39 AM, Christian Schwartze 
<christian.schwar...@uni-jena.de> wrote:

  Try e.g "g.findfile element=vector file=testmap"

  Christian


  From: Helena Herrera 
  Sent: Monday, September 27, 2010 12:25 PM
  To: grass-user@lists.osgeo.org 
  Subject: [GRASS-user] Python Script- Check if a raster exists


  Hi 


  I'm doing a python script and, in a process, I need to check if a raster map 
exists. My idea is, if this map exists I don't need to create otherwise, I need 
to create it (v.to.rast). Is there a way to check if a map exists in the 
current mapset?
  Thanks
  Helena


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