Take this MWE that is to be run in sage:
import networkx as nx
G = nx.DiGraph()
G.add_edge(0,1)
G.nodes[0]['weight'] = 23
nx.write_gml(G, "test.gml")
This gives me a long list of errors ending with:
NetworkXError: 0 is not a string
The same code works without error in Python.
What can I do?
