Skip to main content

PO to MO build time compiler

Project description


This package integrates pure-python gettext translation compilation (msgfmt) into the “build” and “develop” commands.

These commands are extended so that every “data file” identified by setuptools with the .po extension is compiled to a .mo file in the same directory as the .po file.

This integrates very well if you use z3c.recipe.i18n (and hopefully others as well) to manage .po files.


You need to override the “build” and “develop” commands in your, for example:

from setuptools import setup, find_packages
from van.potomo import develop, build

    name = "HelloWorld",
    cmdclass={'build': build,
              'develop': develop},
    version = "0.1",
    packages = find_packages(),


This package exists because the author believes that:

  • Compiled translations should not be stored under revision control, they are not source

  • Compiled translations should not be distributed in tarballs, they are not source

  • Compiled translations should not be “lazily compiled” unless you take into account that filesystems on production machines are often read-only.

  • The process of compiling translations should not require an extra step/options during the build/install or build/develop cycle.

The options available at the time offered all of this:

  • Babel: Not integrated into the “build” distutils command.

  • cc.gettext: Depends on buildout, not useful for deployments by other means.

  • zope.i18n lazy compilation: Very nice for development, but not on some production environments.


van.potomo makes your depend on van.potomo. But outside tools cannot tell this because they need to run the to figure out the dependencies.

Basically this means your developers/users will need to install van.potomo manually before anything else. If anyone knows a robust/good way to get around this limitation, please let the author know.


2.1 (2013-08-23)

  • run egg_info before develop to make sure SOURCES.txt exists and is up to date

2.0 (2013-08-15)

  • Conform to Zope repository policy.

  • Support Python 3

  • Fix issue where recently deleted files could cause an exception if they were still in SOURCES.txt

1.0.0 (2009-03-10)

  • Initial Release

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

van.potomo-2.1.tar.gz (4.8 kB view hashes)

Uploaded source

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Fastly Fastly CDN Google Google Object Storage and Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page