[GRASS-user] loop import+merge

[Thibault Lemaitre]

Hello,

I think there is a python problem when you write :
> i=0
> while i<150:
>         i=i+1
>         i=str(i)
In fact, transform i in a string would cause python to stop the loop 
after the first iteration.
You may change this by another variable like j, like the following :

i=0
while i<150:
         i=i+1
         j=str(i)

         grass.run_command(
             'v.in.ogr', flags="o", dsn="PG:dbname=schirpat",
             layer="sc.av_liegensch", output="GR_av_liegensch_poly"+j,
             type="boundary,centroid", where="bfs="+j)

         grass.run_command(
             'v.patch',flags="-o", 
input="GR_av_liegensch_poly"+j+",GR_av_liegensch_poly", 
output="GR_av_liegensch_poly")

Try it and tell us if it works, yeah ?

Thibault.

Le 14/12/2010 13:32, Patrick_schirmer a écrit :
>
> Hi,
>
> Still trying to create an import and merging of various files via a
> python-loop, as direct import is too heavy. I was searching on how to
> add a flag"-o" in python some days ago.  Found out that it will work
> with 'flags="o"' if I put it directly behind the command, but am still
> not able to combine two flags (-o and --o).
>
> Even though, it seems that the loop I tried with "v.patch" will not
> work at all if input and output has the same filename. I would
> therefor have to create a dummy-file that will have to be a copied at
> the end of each iteration.
>
> Kind of:
> v.patch in=iterationresult,previousfinal out=temp
> v.copy in=temp out=previousfinal --overwrite
>
> Is there a command doing this "v.copy --overwrite"? Or does anyone
> have any other ideas on how to solve this task. It really is essential
> that I find any solution to this.
>
> Thanks for your help,
>
> Patrick
>
>
> ############script of loop###############
> i=0
> while i<150:
>         i=i+1
>         i=str(i)
>
>         grass.run_command(
>             'v.in.ogr', flags="o", dsn="PG:dbname=schirpat",
>             layer="sc.av_liegensch", output="GR_av_liegensch_poly"+i,
>             type="boundary,centroid", where="bfs="+i)
>
>         grass.run_command(
>             'v.patch',flags="-o",
> input="GR_av_liegensch_poly"+i+",GR_av_liegensch_poly",
> output="GR_av_liegensch_poly")
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