For alignment template structures (i.e., sequences for which a structure is also available) see the Structure class in Section 6.17.
# Example for alnsequence objects from modeller import * env = environ() aln = alignment(env, file='../commands/toxin.ali') print("Alignment contains %d sequences:" % len(aln)) for seq in aln: print(" Sequence %s from %s contains %d residues" \ % (seq.code, seq.source, len(seq)))