Lopy is an MIT Scheme interpreter which creation was inspired by SICP book.

Currenly, two modes are supported. REPL:

python3 lopy

And source from file mode:

python3 lopy -f example.rkt
python3 lopy --file example.rkt

1. Parser should return some kind of special object instead of application if the following cases (marked with []):
   • (define [(f a)] (+ 1 2))
   • (lambda [(a b)] (* a b))
   • (cond [((= 1 1) 1)] [(else 2)])
2. Addition of new syntactic forms/builtin procedures from arbitrary file (without editing files in lopy/expressions/ dir)