Parsing S-Expressions in Python

Question

Are there any python modules available for parsing and manipulating symbolic expressions in Python similar to how Lisp expressions are evaluated?

Do you want an s-expression parser that produces Python data structures or an eval facility that evaluates s-expressions as code? — Marcelo Cantos, Jul 05 '10 at 23:14
Sorry for not clarifying- I need to evaluate the s-expressions as code. — adinsa, Jul 05 '10 at 23:17
@adinsa When you say "evaluate the s-expressions as code", how do you expect them to be run? As if they were lisp expressions? If so, then that would require embedding a lisp interpreter. — Edward Loper, Dec 27 '12 at 18:13

score 12 · Answer 1 · edited Feb 12 '19 at 16:36

12

pyparsing (dead link - but see github: pyparsing) comes with an S-expression parser as an example, see here.

edited Feb 12 '19 at 16:36

nealmcb

answered Jul 05 '10 at 23:14

Alex Martelli

score 0 · Answer 2 · answered Jul 18 '14 at 18:54

0

Also, depending on how much work with sexpressions you are doing you might want to check out python hy: https://github.com/hylang/hy

answered Jul 18 '14 at 18:54

joefromct

2 Answers2