Update: This information is outdated since November 2021. The correct way to install igraph’s Python interface is now pip install igraph.
I think you have installed the wrong igraph libray.
This igraph(0.1.11) is the one you installed, while this igraph(0.7.1) is the one you need (and the well-known iGraph).
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Using pip (once you’ve installed it), Just do:
sudo pip uninstall igraph
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Then install the python-igraph-0.7.1 package, using either pip or apt-get as mentionned in comments below:
sudo pip install python-igraph
Hope it works.