I have changed my computer to a Linux Mint x64 OS and I have throubles with a python library, igraph library, when i try to execute and old program I made.
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).
Using pip (once you've installed it), Just do:
sudo pip uninstall igraph
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.
sudo -H pip uninstall igraph
then:
sudo pip install python-igraph
worked for me.