pyGRASS: vector attributes return None

[lucadelu]

If you try to open a vector map in a Mapset different from the current it seems not possible to read attributes. Running the following code from user1 mapset of nc_spm_08

from grass.pygrass.vector import VectorTopo

#counties = VectorTopo('boundary_county')
counties = VectorTopo('boundary_county', mapset='PERMANENT')
counties.open('r')
first = counties[1]
first
first.attrs.values()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'values'