Source code for

Manipulate data in mapsets in GRASS GIS Spatial Database

(C) 2020 by the GRASS Development Team
This program is free software under the GNU General Public
License (>=v2). Read the file COPYING that comes with GRASS
for details.

.. sectionauthor:: Vaclav Petras <wenzeslaus gmail com>

import grass.script as gs

[docs]def map_exists(name, element, mapset=None, env=None): """Check is map is present in the mapset given in the environment :param name: Name of the map :param element: Data type ('raster', 'raster_3d', and 'vector') :param env: Environment created by function grass.script.create_environment :param mapset: Mapset name, "." for current mapset only, None for all mapsets in the search path """ # change type to element used by find file if element == "raster": element = "cell" elif element == "raster_3d": element = "grid3" # g.findfile returns non-zero when file was not found # se we ignore return code and just focus on stdout process = gs.start_command( "g.findfile", flags="n", element=element, file=name, mapset=mapset, stdout=gs.PIPE, stderr=gs.PIPE, env=env, ) output, unused_errors = process.communicate() info = gs.parse_key_val(output, sep="=") # file is the key questioned in grass.script.core find_file() # return code should be equivalent to checking the output if info["file"]: return True return False