Johannes Radinger wrote:
> In GRASS 7 (RC1) python it is possible to export a raster map to an array
> which can be used e.g. by Numpy.
>
> For example:
>
> import grass.script.array as garray
> x1 = garray.array()
> x1.read("my_raster")
>
> It seems that this creates a temporary file in the .tmp folder of the
> respective
> location. I am not sure if this has been existing before, but these
> temporary
> files are not deleted after e.g. x1 is not used anymore (i.e. the
> calculation of
> the script finished). So do I need to manually (in the python script) close
> that x1 so
> that the associated temporary file gets deleted (and if yes how?)? Otherwise
> when using this procedure to do numpy calculations in loops the tmp-files
> pile up quite fast.
>
> Of course I can empty the tmp folder after every loop, but I am not sure
> if this is really the right way.
The temporary files were supposed to be deleted when the array object
was destroyed. However, this relied upon the ._close() method, which
is no longer used. r64426 (trunk) should fix this.
Apart from that, you can manually delete the temporary file for an
array object with e.g. grass.script.try_remove(x1.filename).
--
Glynn Clements <gl...@gclements.plus.com>
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