fogus

lithp

Python2009–2012

fogus / lithp

lithp

McCarthy's Lisp in Python with macros. A celebration of 50+ years of symbolic processing.

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7Mentions

0Explicit recommenders

264GitHub stars

REPOSITORY AT A GLANCE

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What it is

McCarthy's Lisp in Python with macros. A celebration of 50+ years of symbolic processing.

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

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Also in these discussions

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:03:16 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by month7 dated mentions

Observed mentions: 2009-10-08 15:35:11 UTC to 2012-01-25 21:31:26 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Comments
Oct 2009	2009-10-01 00:00:00 UTC	2009-11-01 00:00:00 UTC	1	1
Nov 2009	2009-11-01 00:00:00 UTC	2009-12-01 00:00:00 UTC	0	0
Dec 2009	2009-12-01 00:00:00 UTC	2010-01-01 00:00:00 UTC	0	0
Jan 2010	2010-01-01 00:00:00 UTC	2010-02-01 00:00:00 UTC	1	1
Feb 2010	2010-02-01 00:00:00 UTC	2010-03-01 00:00:00 UTC	0	0
Mar 2010	2010-03-01 00:00:00 UTC	2010-04-01 00:00:00 UTC	0	0
Apr 2010	2010-04-01 00:00:00 UTC	2010-05-01 00:00:00 UTC	0	0
May 2010	2010-05-01 00:00:00 UTC	2010-06-01 00:00:00 UTC	0	0
Jun 2010	2010-06-01 00:00:00 UTC	2010-07-01 00:00:00 UTC	1	1
Jul 2010	2010-07-01 00:00:00 UTC	2010-08-01 00:00:00 UTC	0	0
Aug 2010	2010-08-01 00:00:00 UTC	2010-09-01 00:00:00 UTC	1	1
Sep 2010	2010-09-01 00:00:00 UTC	2010-10-01 00:00:00 UTC	0	0
Oct 2010	2010-10-01 00:00:00 UTC	2010-11-01 00:00:00 UTC	0	0
Nov 2010	2010-11-01 00:00:00 UTC	2010-12-01 00:00:00 UTC	0	0
Dec 2010	2010-12-01 00:00:00 UTC	2011-01-01 00:00:00 UTC	0	0
Jan 2011	2011-01-01 00:00:00 UTC	2011-02-01 00:00:00 UTC	0	0
Feb 2011	2011-02-01 00:00:00 UTC	2011-03-01 00:00:00 UTC	0	0
Mar 2011	2011-03-01 00:00:00 UTC	2011-04-01 00:00:00 UTC	0	0
Apr 2011	2011-04-01 00:00:00 UTC	2011-05-01 00:00:00 UTC	0	0
May 2011	2011-05-01 00:00:00 UTC	2011-06-01 00:00:00 UTC	1	1
Jun 2011	2011-06-01 00:00:00 UTC	2011-07-01 00:00:00 UTC	0	0
Jul 2011	2011-07-01 00:00:00 UTC	2011-08-01 00:00:00 UTC	0	0
Aug 2011	2011-08-01 00:00:00 UTC	2011-09-01 00:00:00 UTC	0	0
Sep 2011	2011-09-01 00:00:00 UTC	2011-10-01 00:00:00 UTC	0	0
Oct 2011	2011-10-01 00:00:00 UTC	2011-11-01 00:00:00 UTC	1	1
Nov 2011	2011-11-01 00:00:00 UTC	2011-12-01 00:00:00 UTC	0	0
Dec 2011	2011-12-01 00:00:00 UTC	2012-01-01 00:00:00 UTC	0	0
Jan 2012	2012-01-01 00:00:00 UTC	2012-02-01 00:00:00 UTC	1	1

What Hacker News says

7 sources

fogus·Jan 25, 2012

If macros are needed for the definition of a lisp, then you'll eliminate some important Lisps.[1] If you want macros in the one at the link (ulithp), then you only need to write that feature into an evaluator (dare I say, meta-circular) written in ulithp much like what is done in my other Lisp Lithp.[2] [1]: http://www-formal.stanford.edu/jmc/recursive/recursive.html [2]: https://github.com/fogus/lithp/blob/master/src/core.lisp#L10...

In Lisp in 32 lines of Ruby

fogus·Oct 24, 2011

http://github.com/fogus/lithp

In Let me see your Lisp implementation. Here's mine.

mmphosis·May 4, 2011

https://github.com/fogus/lithp http://picolisp.com/5000/-2.html http://mumble.net/~jar/tproject/ http://www.lambdassociates.org/Lib/libraries.htm http://www.newlisp.org/ http://www.paulgraham.com/arc.html http://sites.google.com/site/waspvm/ Fluchtpunkt Lisps are… Focused: Uncompromising in their vision Spartan: Devoid of the seemingly unnecessary comforts found in many modern languages Controversial: Not always by design, but often because of their design Fun

In The German School of Lisp ("Fluchtpunkt Lisps")

fogus·Aug 10, 2010

I've used McCarthy Lisp as a code kata for a few years now. It's small enough to do in < 1 week (maybe a weekend if you have more time than me), is well known, and damn fun. I am currently learning Ruby using this kata: http://github.com/fogus/lithp

In A micro manual for Lisp - Not the whole truth (McCarthy, 1978)

fogus·Jun 28, 2010

McCarthy's original could give you macros, although they would be extremely cumbersome. I've been wanting to implement some sort of macro system in my minimal Lisp impl. http://github.com/fogus/lithp

In 7 lines of code, 3 minutes: Implement a programming language from scratch

fogus·Jan 2, 2010

One note of interest about pg's source code is that the dot functions (and., pair., etc...) are based in the host Lisp and not `eval.`. The implications are that pg's functions can take advantage of lexical scope, whereas McCarthy's original Lisp was dynamically scoped. This will make a huge difference if you are so inclined to use pg's code to do some hardcore Lisp anthropology. I did so a few years back using pg's code and it was a blast. I then wrote a small Lisp runtime with dynamic scope (http://github.com/fogus/lithp) to do the same exercise and it turned out to be a very different experience. It's worth trying it out to gain a full appreciation for the tools the Lisp pioneer's had to work with. Thanks for linking this article -- it's one of my favorites.

In The Roots of Lisp

fogus·Oct 8, 2009

I wrote a version of McCarthy's original Lisp in Python if you want to study the roots of Lisp. http://github.com/fogus/lithp

In Ask HN: Clean Lisp implementation for study?