[shakna]

Here's a code snippet using SRFI 49, for Scheme. (A 2003 formalisation for a macro system that had been rocking around for a few decades, for a very old Lisp):

    define
       fac x
       if
        = x 0
        1
        * x
          fac
           - x 1

Python's keywords are sometimes shorter, but they are familiar to most Lispers, which some of the founders were.