When you try to render a graph derived from a numpy adjacency matrix, you get this error.

G = nx.from_numpy_matrix(mymatrix)
nx2d3.embed_networkx(G)

This can be solved by converting node IDs to strings (G = nx.relabel_nodes(G, lambda x: str(x))) but it seems like a more general solution is to handle this in the embed_networkx call, since any non-JSON-serializable ID type will fail with this error.

(Traceback suggests that this is a failure of the node_link_data(graph) call on line 99 of embed.py)

[EDIT]: This still fails even if I verify that the data are JSON-serializable with

G =  json_graph.node_link_graph(json_graph.node_link_data(G))

So this is a function of the nx2d3 library, not of the networkx JSON serializer, I believe.

figure out what common use cases are and make multiple defaults. possibly split into a different py file, make functions that return the strings?

right now the script only has an option for a string to be input but it might be common to load up a file as well. make a different function for that

make explicitly different functions for each, possibly use a global function that checks the type and decides