Parser/runner for a Lisp like language.

(defun 'f 'n
  (body
    (print n)
    (if (< n 5)
      (f (+ n 1)) 
    ) 
  )
)

(f 0)

0
1
2
3
4
5
None

To run a source file:

python main.py examples/FizzBuzz.ls

There is a simple Flask application to run code from a web browser.

$ cd flask/
$ export FLASK_APP=app.py
$ flask run