camio  filed a deletion request for python-libclang :
I think this should be removed now that python 3 support has been integrated into clang. See https://bugs.archlinux.org/task/55161 which tracks the proper installation into the python 3 directories.
Request #8783 has been rejected by Alad :
From the comments:
"Ignore my previous comment. Clang 5 (which isn't yet released) is the version that includes Python 3 support which will render this package unnecessary."