Thanks for the request Dmitry. You may want to read http://www.python.org/dev/peps/pep-0002/ to know which steps are required to add a module to the stdlib. In particular, the module has to be proven on the field and the author needs to sign a contributor agreement. It’s not clear which implementation you want to add (the one from BioPython I guess); I don’t know if this proposal will fly if you’re not the author of the module. (I don’t want to scare you away, just to explain the process.)

If you contact the author of the code you want to include and they agree with your idea, then it’ll be time to convince python-ideas that this would be a generally useful addition and that the chosen class is the best of breed.

A note about versions: I removed 3.1 since new features don’t go in stable releases, and 3.3 since it does not exist yet. Everything in 3.2 will go in 3.3 too: this value is useful only to mean “won’t go in 3.2, remind later”.

I also edited the title to make it shorter, to make emails and reports more readable. Thanks again for your report.