[graph-tool] Dissapearing Vertex Property Value

Hi! I'm having problems wrapping my head around this behaviour: g = gt.Graph() g.add_vertex() g.vp['name_num'] = g.new_vp('object') print(g.vp.name_num[0]) # None g.vp.name_num[0] = [('a', 1)] print(g.vp.name_num[0]) # [('a', 1)] g.vp.name_num[0] = g.vp.name_num[0].append(('b', 2)) print(g.vp.name_num[0]) # None -- Sent from: http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/