An implementation of Python in Common Lisp
Common Lisp

CLPython - an implementation of Python in Common Lisp

CLPython is an open-source implementation of Python written in Common Lisp. With CLPython you can run Python programs in a Lisp environment. Libraries written in Lisp are available to Python code, and Python libraries can be accessed by Lisp code. Also Python and Lisp code can be mixed.

CLPython is developed by Willem Broekema and is released as open source under the LLGPL.

The project was started in 2006, and is currently (2013) not under active development anymore.

The git address changed on Feb 4, 2014 from: to:


Please see the Introduction and Manual on


CLPython runs successfully on:


Using QuickLisp:

(ql:quickload "clpython")