Dear all, I do not understand the behavior of the following code (this is not a minimal example, I tried to reproduce the problem on a minimal example but I could not...). I do not get why, when I purge the vertices and edges after filtering, the properties of the vertices are not consistent.

Thanks for your help,

Flavien.

_graph = gt.Graph(_originalGraph)

_bus = _graph.new_vertex_property('bool')
_bus.a = True
_trainVertices = [_v for _v in _graph.vertices() if _name[_v][:3] == 'stn']

for _v in _trainVertices :
_bus[_v] = False

print 'original graph #', _graph
print 'train number # ', len([_v for _v in _graph.vertices() if _name[_v][:3] == 'stn']), '\n'

_graph.set_vertex_filter(_bus)
print 'filtered graph #', _graph
print 'train number #', len([_v for _v in _graph.vertices() if _name[_v][:3] == 'stn']), '\n'

_graph.purge_vertices()
_graph.purge_edges()
print 'purged graph #', _graph
print 'train number #', len([_v for _v in _graph.vertices() if _name[_v][:3] == 'stn']), '\n'

original graph # <Graph object, directed, with 2775 vertices and 9341 edges at 0x313be50>
train number #  112 

filtered graph # <Graph object, directed, with 2663 vertices and 6307 edges, edges filtered by (<PropertyMap object with key type 'Edge' and value type 'bool', for Graph 0x313be50, at 0x2a3c750>, False), vertices filtered by (<PropertyMap object with key type 'Vertex' and value type 'bool', for Graph 0x313be50, at 0x2d62610>, False) at 0x313be50>
train number # 0 

purged graph # <Graph object, directed, with 2663 vertices and 6307 edges, edges filtered by (<PropertyMap object with key type 'Edge' and value type 'bool', for Graph 0x313be50, at 0x313bc50>, False), vertices filtered by (<PropertyMap object with key type 'Vertex' and value type 'bool', for Graph 0x313be50, at 0x313bb90>, False) at 0x313be50>
train number # 109