A lisp interpreter written in python.

I used https://github.com/keithgabryelski/plisp/blob/master/lispbook.pdf as a guide.

example run:

laptop$ python plisp.py 
PLisp v1.0:release [7 July 2012] by Keith Gabryelski <[email protected]>
(+ 1 1)
2
(apply + '(1 2))
3