A new module within PyHasse-inet is established: Copeland.
Have a look at the documentation
For references we refer to
Al-Sharrah, G. 2014. Ranking Hazarduous Chemicals with a Heuristic
Approach to Reduce Isolated Objects in Hasse Diagrams. Pages 217-235
in R. Bruggemann, L. Carlsen, and J. Wittmann,
eds. Multi-indicator Systems and Modelling in Partial Order. Springer,
Al-Sharrah, G. 2010. Ranking Using the Copeland Score: A Comparsion
with the Hasse Diagram. J.Chem.Inf.Model. 50:785-791.