Python-twisted is partially ported to Python3 and AFAIK Python3 support could be enabled in your package python-txws.
I've tried it and build looks good and installation of python3 subpackage and import in CLI as well, but there are no tests to prove that everything is really ok. Could you please check it?
Koji scratch build: http://koji.fedoraproject.org/koji/taskinfo?taskID=14869857
I will provide patch for specfile in minute.
Thank you and have a nice day.
Created attachment 1178844 [details]
Enable Py3 support patch
I am also working on python-txzmq but there I asked upstream for a new release with a handy improvement. So I will fill a bug for this later.
Thanks Lumír! Applied and built in rawhide. :)