[GRASS-user] Returning values to Python

Glynn Clements glynn at gclements.plus.com
Thu Oct 30 00:04:18 PDT 2014

Kevin Williams wrote:

> Firstly I apologize if this is a duplicate, but I am not getting my
> own posts emailed to me, and I don't see them in the list archive, so
> I am using another email account.
> How does one return attribute values from a call to the 'r.what'
> module running in a python script?
> When this query executes, it prints the result to the terminal, but I
> need to get the value back in the script.
> One of the documentation pages mentioned a function "stdout2dict" from
> "grass.pygrass.modules", but it does not look like this is in the
> pygrass package any longer?

If you use grass.script.raster_what(), it returns a list of

AFAICT, PyGRASS requires you to add stdout_=PIPE, then you can get the
output as a string from module.outputs["stdout"].value.

Glynn Clements <glynn at gclements.plus.com>

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