You can set print 3 and get lots of little printouts on what gbs file is being read for each basis. Can also get info off the wfn (e, w = energy(..., return_wfn=True)) via w.get_basis() and something like w.get_basisset('DF_BASIS_SCF') (http://psicode.org/psi4manual/master/psi4api.html?highlight=get_basisset#psi4.core.Wavefunction.get_basisset) and then some of the printing options on the BasisSet class like print_out or print_detail_out.