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A Whitespace interpreter.

Project Description

An interpreter written in Python for the imperative, stack based language called Whitespace.


Install it using:

$ pip install whitespace

You would now have access to an executable called whitespace. Type

$ whitespace -h

to learn more.


Let’s say you’ve written a Whitespace program and stored it in the file Then, to execute that program, type:

$ whitespace

You can find example Whitespace programs at tests/fixtures. Be sure to run them to see what they do.

For example, here’s the factorial program and a sample execution:

$ whitespace
Enter a number: 40
40! = 20397882081197443358640281739902897356800000000


Get the source code.

$ git clone

Create a virtual environment and activate it.

$ cd whitespace-python
$ pyvenv venv
$ . venv/bin/activate

Then, upgrade pip and setuptools and install the development dependencies.

(venv) $ pip install -U pip setuptools
(venv) $ pip install -r requirements-dev.txt

You’re now all set to begin development.


Tests are written using the unittest unit testing framework.

Run all tests.

(venv) $ python -m unittest

Run a specific test module.

(venv) $ python -m unittest tests.test_parser

Run a specific test case.

(venv) $ python -m unittest tests.test_parser.ParserTestCase

Run a specific test method.

(venv) $ python -m unittest tests.test_parser.ParserTestCase.test_it_parses_push



Thanks to Edwin Brady and Chris Morris for designing/developing this programming language (also developers of the Idris programming language). I’ve had lots of fun playing with it and writing interpreters (in Racket, Haskell, Ruby and now Python) for it.

Change Log

1.0.0b2 (2016-09-03)



  • Explicitly list the packages to be included in the distribution
  • Stop including tests in the distribution
  • Stop using since open does the job in Python 3
  • Consistently name test cases with a TestCase suffix

1.0.0b1 (2016-09-02)


  • A fully tested parser with error handling and source location tracking
  • An interpreter
  • A CLI for running the interpreter


  • Fix the console’s output buffering by flushing after every write

0.1.0.dev2 (2016-09-01)


  • Update and to ensure the correct files are included in the distribution

0.1.0.dev1 (2016-08-31)


  • A virtual machine
  • A console abstraction to make it easier to test I/O
  • The stack manipulation, arithmetic, heap access, flow control and I/O instructions

0.0.1.dev1 (2016-08-31)


Release History

Release History

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
whitespace-1.0.0b2-py3-none-any.whl (13.7 kB) Copy SHA256 Checksum SHA256 py3 Wheel Sep 3, 2016
whitespace-1.0.0b2.tar.gz (9.3 kB) Copy SHA256 Checksum SHA256 Source Sep 3, 2016

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