[GRASS-dev] Popen and r.mapcalc, pygrass' implications

Vaclav Petras wenzeslaus at gmail.com
Thu Aug 14 06:26:36 PDT 2014

On Thu, Aug 14, 2014 at 7:08 AM, Glynn Clements <glynn at gclements.plus.com>

> > In [2]: cmd_list = ['r.mapcalc', 'expression="elev100=elevation*100"',
> '--o']
> This is wrong. The double-quote characters shouldn't be there.

It took me some time to realize that quotes in

r.mapcalc expression="a = b"

are processed by shell and that the above is equal to

r.mapcalc "expression=a = b"
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