CFFI-based Python binding for X

 xcffib is intended to be a (mostly) drop-in replacement for xpyb. xpyb has an
 inactive upstream, several memory leaks, is python2 only and doesn't have pypy
 support. xcffib is a binding which uses CFFI, which mitigates some of the
 issues described above. xcffib also builds bindings for 27 of the 29 (xprint
 and xkb are missing) X extensions in 1.10.