[gentoo-science] ImportError with latest python-igraph

[Marc Vinyals <marcvinyals@velodius.com>]

Hi all,

I am running into trouble when trying to use
dev-python/python-igraph-0.9.0 with dev-libs/igraph-0.9.0:

$ python3
Python 3.8.8 (default, Mar 14 2021, 23:44:05) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import igraph
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.8/site-packages/igraph/__init__.py", line 31,
in <module> from igraph._igraph import (
ImportError:
/usr/lib/python3.8/site-packages/igraph/_igraph.cpython-38-x86_64-linux-gnu.so:
undefined symbol: igraph_subcomponent

To get this to work I have to downgrade both igraph and python-igraph
to version 0.8.3 (mixing and matching do not work either because of
different reasons, but that would be a separate issue). I did not try
igraph-0.8.5.

I did not find any reports of this issue upstream and this looks too
basic to remain unnoticed, so I suspect the problem is somewhere else on
my side, but just in case can anyone reproduce it?

Best,
Marc