[graph-tool] "in-out" correlations in graph-tool

Dear all, I want to calculate the "in-out" and "out-in" degree correlations in directed networks. However, I don't see any function in graph-tool that would do this for me. The usual "gt.scalar_assortativity" can do this only for "in-in" or "out-out" correlations. Can somebody please point out to me if there is any way around? Thank you Snehal -- Snehal Madhukar Shekatkar Pune India