This is almost a straight conversion with standard layout (trunk, branches, tags) ignoring the superfluous "pyx" level beneath. The "tag branches" are converted into proper tag objects, preserving author, name and message of the "tag branch creating" commit. If you want a clone with git-svn capabilities (git-svn's log, proplist, dcommit etc.) do the following:

git clone git://repo.or.cz/PyX.git
cd PyX
git svn init --prefix=origin/ --trunk=trunk/pyx --branches='branches/*/pyx' http://svn.code.sf.net/p/pyx/code

On the first "git svn log" run the necessary metadata will be rebuilt without fetching individual svn revisions.