python-igraph pip installable, also on Windows

You might be interested to know that python-igraph is pip installable since version 0.8. Similarly, leidenalg can also be installed using pip since version 0.8. This includes all major platforms (including Windows) for recent Python versions. You might be able to move some of the optional requirements to the normal requirements.

Additionally, you may be interested to know that we added conversion methods between igraph and networkx and graph-tool. These are available from version 0.8.3 onwards. This should enable you to remove (or simplify) some of the conversions you are making in utils.py.

[Yquetzal]

OK, I checked it and yes the _nx_name attribute retains the original type, so it solves the problem. The only thing we need to change is to check if the _nx_name attribute is present instead of the name attribute.

[vtraag]

Good to know about that @Yquetzal! I think in python-igraph, the from_networkx and to_networkx functions should retain the original Python types that are used. networkx does not have any explicit node ordering, while igraph explicitly does and uses integer indices to refer to nodes (although names are also supported). Perhaps some of the problems stem from there.

In any case, if there is something going wrong with the from_networkx or to_networkx functionality, we would be happy to learn about it and correct it!