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Python multiprocessing fork with improvements and bugfixes

Project description


Build status on Linux Build status on Windows BSD License Billiard can be installed via wheel Supported Python versions. Support Python implementations.


billiard is a fork of the Python 2.7 multiprocessing package. The multiprocessing package itself is a renamed and updated version of R Oudkerk’s pyprocessing package. This standalone variant draws its fixes/improvements from python-trunk and provides additional bug fixes and improvements.

  • This package would not be possible if not for the contributions of not only the current maintainers but all of the contributors to the original pyprocessing package listed here.

  • Also, it is a fork of the multiprocessing backport package by Christian Heims.

  • It includes the no-execv patch contributed by R. Oudkerk.

  • And the Pool improvements previously located in Celery.

  • Billiard is used in and is a dependency for Celery and is maintained by the Celery team.


The documentation for billiard is available on Read the Docs.

Bug reporting

Please report bugs related to multiprocessing at the Python bug tracker. Issues related to billiard should be reported at

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