[Biopython] deleting in-group paralogs from newick trees

[Jessica Grant]

Hello,

I am looking at large phylogenetic trees that have many paralogs.  I  
would like to simplify my trees so that all monophyletic paralog  
groups are collapsed--or all sequences except the shortest branch are  
deleted.  Is there a Biopython module that can help?  I started  
looking at Phylo, but couldn't see an obvious way.

Thanks,

Jessica