Hi all, I have a problem with load_graph_from_csv() using gt 2.27. from graph_tool.all import * import pandas as pd edge_list = pd.DataFrame(['a', 'b', 1, 'c']) edge_list.to_csv('edge_list.csv', index=False, header=False) g = load_graph_from_csv('edge_list.csv', string_vals=True, eprop_types=['int', 'string'], eprop_names=['weight', 'type']) After this is done, three properties are listed: g.list_properties() This happens: g.vp.name.a # supposed to be a "PropertyArray" holding the vertex names as strings, but actually a "NoneType" g.ep.type.a # supposed to be a "PropertyArray" holding the edge type as a string, but actually a "NoneType" g.ep.weight.a # supposed to be, and actually is, a "PropertyArray" holding the edge weight as an integer Is the problem with the way I call the load_graph_from_csv() function? Thanks a lot Haiko