slackbuilds/python/waitress

Waitress is meant to be a production-quality pure-Python WSGI server
with very acceptable performance. It has no dependencies except ones
which live in the Python standard library. It runs on CPython on Unix
and Windows under Python 2.6+ and Python 3.2+. It is also known to
run on PyPy 1.6.0+ on UNIX. It supports HTTP/1.0 and HTTP/1.1.