The library cl4py (pronounce as clappy) allows Python programs to call Common Lisp libraries. Its official mascot is the cl4py-bird:

You are a Python programmer, but you want access to some of the powerful features of Lisp, for example to compile code at run time? Or you want to use some awesome Lisp libraries? Or you are a Lisp programmer and want to show your work to your Python friends. In all these cases, cl4py is here to help you.

You can start any number of Lisp subprocesses within Python, like this: