wheel 0.9

A built-package format for Python.

Wheel

A built-package format for Python.

A wheel is a ZIP-format archive with a specially formatted filename and the .whl extension. It is designed to contain all the files for a PEP 376 compatible install in a way that is very close to the on-disk format. Many packages will be properly installed with only the “Unpack” step (simply extracting the file onto sys.path), and the unpacked archive preserves enough information to “Spread” (copy data and scripts to their final locations) at any later time.

The wheel project provides a bdist_wheel command for setuptools (requires distribute >= 0.6.28). Wheel files can be installed with a patched pip from https://github.com/dholth/pip.

Why not egg?

Python’s egg format predates the packaging related standards we have today, the most important being PEP 376 “Database of Installed Python Distributions” which specifies the .dist-info directory (instead of .egg-info) and PEP 345 “Metadata for Python Software Packages 1.2” which specifies how to express dependencies (instead of requires.txt in .egg-info).

Wheel implements these things. It also provides a richer file naming convention that communicates the Python implementation and ABI as well as simply the language version used in a particular package.

Unlike .egg, wheel will be a fully-documented standard at the binary level that is truly easy to install even if you do not want to use the reference implementation.

0.9

• Updated digital signatures scheme

• Python 3 support for digital signatures

• Always verify RECORD hashes on extract

• “wheel” command line tool to sign, verify, unpack wheel files

0.8

• none/any draft pep tags update

• improved wininst2wheel script

• doc changes and other improvements

0.7

• sort .dist-info at end of wheel archive

• Windows & Python 3 fixes from Paul Moore

• pep8

• scripts to convert wininst & egg to wheel

0.6

• require distribute >= 0.6.28

• stop using verlib

0.5

• working pretty well

0.4.2

• hyphenated name fix

0.4

• improve test coverage

• improve Windows compatibility

• include tox.ini courtesy of Marc Abramowitz

• draft hmac sha-256 signing function

0.3

• prototype egg2wheel conversion script

0.2

• Python 3 compatibility

0.1

• Initial version