> # the next line works only when the script es started from within the
terminal window from the started GRASS session
> #grass.run_command('r.viewshed', input = input_map, output = output_map,
> coordinate=[2560807,5823616], obs_elev=100, max_dist=3000, overwrite=True)
is GRASS_ADDON in the PATH?
r.viewshed is an addon saved in the GRASS_ADDON folder and not in GISBASE;
so if GRASS_ADDON isn't in PATH, r.viewshed may be not found.
HTH
-----
best regards
Helmut
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