A very simple Lisp interpreter in 250 lines of literate Python

What it does

A few years ago, I tried to work my way through Structure and Interpretation of Computer Programs . It’s one of these books every Lisp person will tell you to read. You can actually tell it’s a classic because almost no one read it all the way through. One thing that stuck with me is the concept of the metacircular evaluator. A metacircular evaluator is a fancy way to call how a Lisp interpreter that evaluates a Lisp expression recursively. There’s a lot of abstruse schemas on the Internet to explain it but for some reason I could never wrap my head around it. The other day I stumbled upon Peter Norvig’s How to write a Lisp in Python , which took me a few years back. This time, I would…from khamidou.com

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