[GRASS-user] How to create+use reclass or recode rules in a python script

Glynn Clements glynn at gclements.plus.com
Thu Dec 1 01:40:43 EST 2011

Moritz Lennert wrote:

> I'm pretty sure someone has already answered this, but cannot get my 
> hands on the relevant mail: which grass python lib function should I use 
> and how in order to be able to feed r.recode, r.reclass, r.colors, etc 
> rules on the fly ?

feed_command() or write_command().

The former returns a Popen object, so you can write to its .stdin
member. You need to call p.stdin.close() and p.wait() once you're

The latter accepts the input as a string via the stdin= parameter,
waits for completion and returns the exit status.

Glynn Clements <glynn at gclements.plus.com>

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