Python-LZO -- Python bindings for LZO

              Copyright (c) 1996-2002 Markus F.X.J. Oberhumer
                          <markus@oberhumer.com>
                 http://www.oberhumer.com/opensource/lzo/
              Copyright (c) 2011-2016 Joshua D. Boyd
                          <jdboyd@jdboyd.net>
                 https://github.com/jd-boyd/python-lzo

What is LZO ?

LZO is a portable lossless data compression library written in ANSI C. It offers pretty fast compression and very fast decompression. Decompression requires no memory.

In addition there are slower compression levels achieving a quite competitive compression ratio while still decompressing at this very high speed.

What is Python-LZO ?

Python-LZO provides Python bindings for LZO, i.e. you can access the LZO library from your Python scripts thereby compressing ordinary Python strings.

Installation

pip install python-lzo

Or explicitly from source, either from a specific release or from the repo (requires build tools):

pip install python-lzo-x.y.tar.gz
pip install https://[...]/python-lzo-x.y.tar.gz
pip install git+https://github.com/jd-boyd/python-lzo

Building from source

Building from source requires build tools. On most Linux distributions they are probably already installed. On Windows you need Microsoft C++ Build Tools (which should already be installed if you have Visual Studio). On macOS you need XCode installed, or something else that provides a suitable C compiler. Then either git clone, or download a source distribution and untar it. Once you are in the root of the project directory where pyproject.toml is located, run python -m build -w. This should build a wheel in the dist directory. You might need to install build with pip install build.

If you really want to build a wheel for Python 2.7 on Windows you'll need the Microsoft Visual C++ Compiler for Python 2.7.

Where's the documentation ?

Python-LZO comes with built-in documentation which is accessible using

>>> import lzo
>>> help(lzo)

Additionally you should read the docs and study the example programs that ship with the LZO library.

Python 2 support statement

Python 2.7 is still supported but without being a priority. Support will be dropped soon.

Notes

Wheels are built with cibuildwheel on GitHub Actions. Tests are run for all combinations of platform and Python version that it can run tests for.

Releasing

1. Update version in pyproject.toml, setup.py and the MODULE_VERSION define in lzomodule.c.
2. Update NEWS.
3. Tag with new release.
4. wheels (download from github actions)
5. Upload to PyPi (twine upload dist/*)

Copyright

The LZO and Python-LZO algorithms and implementations are Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002 Markus Franz Xaver Johannes Oberhumer markus@oberhumer.com

The Python-LZO algorithms implementated post 2011 are Copyright (C) 2011, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, & 2023 Joshua D. Boyd jdboyd@jdboyd.net and others as denoted in the git history.

The LZO and Python-LZO algorithms and implementations are distributed under the terms of the GNU General Public License (GPL). See the file COPYING.