igraph RuntimeWarning

[haoqichen20]

igraph produces the following warning but does not affect phuEGO output.

/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/igraph/io/files.py:494: RuntimeWarning: Ignoring names attribute 'name', attribute type is not a string. at src/io/ncol.c:316
return writer(f, *args, **kwds)

[szhorvat]

Make sure that the name attribute is of type string. While the warning is due to a limitation of the NCOL writer (which could be relaxed if there is demand for it), at this time using other types than strings as vertex names is not recommended. Integer names in particular can cause problems that are unrelated to the NCOL writer, as there's a chance for confusion between names and indices.

I do hope that support for integer names will improve in the future, but we're not there yet.