A tiny interpreter for a simple programming language. Includes a parser, bytecode compiler, and virtual machine, as well as a full test suite, with no dependencies other than Python 3 and the Python standard library.

>>> let x = 32
>>> x
32
>>> x + 10
42
>>> fn add(x, y) = x + y
>>> add(x, 10)
42
>>> if true then 42 else 666 end
42

The entire interpreter is contained in a single executable Python file, tiny.py.