Lisp implementation in Python
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README
pylisp.py

README

== PyLisp

Lisp implementation in Python.


== How to use

% python pylisp.py
>  (car '(a b c))
a
>  (cdr '(a b c))
(b c)
>  (cons 1 (cons 2 (cons 3 ())))
(1 2 3)
>  (defun fact (n) (if (eq n 0) 1 (* n (fact (- n 1)))))
fact
>  (fact 10)
3628800
>  (defun fib (n) (if (eq n 1) 1 (if (eq n 0) 1 (+ (fib(- n 1)) (fib(- n 2))))))
fib
>  (fib 12)
233
>  (defun gen (n) (lambda (m) (setq n (+ n m))))
gen
>  (setq x (gen 100))
<expr>
>  (x 10)
110
>  (x 90)
200
>  (x 300)
500