Lisp in Python as a library (not crossposted)

[Ville Vainio]

Apparently there is some kind of toy Lisp interpreter written in Python:

http://www.biostat.wisc.edu/~annis/creations/PyLisp/pylisp.html

However, how about extending the idea? I.e., making all the Python
functions callable from Lisp, and having all the objects in Lisp
actually be Python objects (using some classes like cons cells etc.):

-----------------------------
lst = readlisp("""(defun sum (x y) (+ x y))""")

# lst == <cons cell at 0x123>

ns = mk_lisp_namespace() # this has lambda, defun, defmacro & friends

eval (lst,ns)

# ns["sum"] == <cons cell>

def sum2(x,y):
return x+y

ns["sum2"] = sum2

s = evallist("(sum2 2 3)",ns)

# s == 5

---------------------------------

Sounds like a nice way to bring us all the macro power our Lisp
friends glorify so much, and a way to end all the inter-newsgroup
flamewars once and for all :-).

--
Ville Vainio http://www.students.tut.fi/~vainio24

[Alan Gauld]

On 21 Oct 2003 09:39:04 +0300, Ville Vainio

<ville.spamm...@spamtut.fi> wrote:
> Apparently there is some kind of toy Lisp interpreter written in Python:
>
> http://www.biostat.wisc.edu/~annis/creations/PyLisp/pylisp.html

Danny Yoo did a basic Scheme or Lisp intrpreter in Python a few
years ago - it may be on the Useless Python website...???

Are you listening Danny?

Alan G.

Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld

[Robin Becker]

In article <3f95abc6....@news.blueyonder.co.uk>, Alan Gauld
<alan....@btinternet.com> writes

I wish all the lisp versus python wars would go away, but if they really
want to do 'my language is bigger than your language' then cross
language translation is the way to go. Then they can argue about code
size efficiency etc in some reasonable way. Assuming both languages are
Turing complete probably eliminates most of the arguments anyway.
--
Robin Becker

[Damien Wyart]

* alan....@btinternet.com (Alan Gauld) in comp.lang.python:

> Danny Yoo did a basic Scheme or Lisp intrpreter in Python a few years
> ago - it may be on the Useless Python website...???

It can be found here :

<http://www-hkn.eecs.berkeley.edu/~dyoo/python/pyscheme/index.html>

--
DW