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Pysch: Scheme runtime environment in Python

Use case for Pysch

I developed Pysch in order to run SXPath and SXSLT under Python (it works already). I think that Pysch can be used to run any Scheme code.

Compliance and limitations

Any deviations from the R5RS are considered to be bugs. Report a bug.

Tail recursion is supported. Continuations are not supported, but can be implemented if required. Pysch uses the heap-based model as desribed in the “Three Implementation Models for Scheme”[pdf].

Only part of the core standard procedures is implemented. The full list can be found in pysch/func/func.py. If you need a missed procedure, implement it yourself or submit a support request.

Pysch is very slow. I'm not going to fix it yet. I use Pysch for research goals and not in production.

Download

Documentation

Related projects

There are several Scheme/Lisp in Python projects. I'm aware of:

The pyscheme page provides more links to other similar projects.

Why don't I use one of the exising projects? See Joel's article “In Defense of Not-Invented-Here Syndrome”.


Author: Oleg Paraschenko
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