[GRASS-dev] [GRASS GIS] #3010: PyGRASS fails to write vector map with attributes

GRASS GIS trac at osgeo.org
Wed May 4 20:19:26 PDT 2016

#3010: PyGRASS fails to write vector map with attributes
 Reporter:  annakrat  |      Owner:  grass-dev@…
     Type:  defect    |     Status:  new
 Priority:  major     |  Milestone:  7.1.0
Component:  PyGRASS   |    Version:  svn-trunk
 Keywords:  vector    |        CPU:  Unspecified
 Platform:  All       |
 Example taken from a workshop material:

 from grass.pygrass.vector import VectorTopo
 from grass.pygrass.vector.geometry import Point
 point1 = Point(635818.8, 221342.4)
 point2 = Point(633627.7, 227050.2)
 cols = [(u'cat',       'INTEGER PRIMARY KEY'),
         (u'name',      'TEXT')]

 with VectorTopo('my_points', mode='w', tab_cols=cols, overwrite=True) as
     # save the point and the attribute
     my_points.write(point1, ('pub', ))
     my_points.write(point2, ('restaurant', ))
     # save the changes to the database


 WARNING: Vector map <my_points> already exists and will be overwritten
 WARNING: Coor file of vector map <my_points at PERMANENT> is larger than it
          should be (18 bytes excess)
 Building topology for vector map <my_points at PERMANENT>...
 Registering primitives...
 0 primitives registered
 0 vertices registered
 Building areas...
 0 areas built
 0 isles built
 Attaching islands...
 Attaching centroids...
 Number of nodes: 0
 Number of primitives: 0
 Number of points: 0
 Number of lines: 0
 Number of boundaries: 0
 Number of centroids: 0
 Number of areas: 0
 Number of isles: 0
 Traceback (most recent call last):
   File "<stdin>", line 3, in <module>
   File "/home/anna/dev/grass/trunk1/dist.x86_64-pc-linux-
 gnu/etc/python/grass/pygrass/errors.py", line 15, in wrapper
     return method(self, *args, **kargs)
   File "/home/anna/dev/grass/trunk1/dist.x86_64-pc-linux-
 gnu/etc/python/grass/pygrass/vector/__init__.py", line 197, in write
     cats.set(cat, self.layer)
   File "/home/anna/dev/grass/trunk1/dist.x86_64-pc-linux-
 gnu/etc/python/grass/pygrass/vector/basic.py", line 452, in set
     libvect.Vect_cat_set(self.c_cats, layer, cat)
 ctypes.ArgumentError: argument 3: <type 'exceptions.TypeError'>: wrong

 Works in 7.0.4.

Ticket URL: <https://trac.osgeo.org/grass/ticket/3010>
GRASS GIS <https://grass.osgeo.org>

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