Hi, I'm trying to convert two columns of my pandas dataframe into network using them as edge list. A similar query <https://stackoverflow.com/questions/35459597/graph-tool-reading-edge-lists-from-pandas-dataframe> was posted in StackOverflow but with different problem and it didn't help me. When I am trying the following code it gives me error: * myGraph.add_edge_list(i for i in df[['node1','node2']].values.tolist())* Where, my Graph is the graph; df is the dataframe with 4 columns out of which I am using two 'node1' and 'node2'. *File "/usr/lib/python3/dist-packages/graph_tool/__init__.py", line 2109, in add_edge_list libcore.add_edge_list_iter(self.__graph, edge_list, eprops)* *TypeError: No registered converter was able to produce a C++ rvalue of type unsigned long from this Python object of type str * I tried upgrading my boost library but it doesn't solve the problem. Any suggestions ? -- Sent from: http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/