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The source code from Biopython is freely available for your use and contribution. The core developers maintain a stable trunk under revision control from which we will roll releases as new functionality is integrated and bugs are fixed.


About git

The Biopython source code is kept under a distributed version control system which allows multiple users from around the world to work on the same code base at the same time. We currently use git (developed by Linus Torvalds for Linux kernel development) hosted on GitHub.

An hourly updated CVS checkout of Biopython was available at and we intend to have this updated from git shortly.

You can track changes via RSS.

Viewing git sources

Our current development git sources are available for viewing via GitHub:

Biopython GitHub Home

This is the main repository. You can download these sources by clicking the Download link near the top of the page.

Anonymous Access

Getting a copy of the repository (called "cloning" in git terminology) is very simple using the git command line tool, you don't need a account or password:

git clone git://

This command creates a local copy of the entire Biopython repository on your machine (your own personal copy of the official repository with its complete history). You can update this local copy at the command line (from within the Biopython repository directory) with:

git pull origin

You can even make local changes and commit them to this local copy, see GitUsage or the git documentation for further information.

Write Access

In order to make changes to the official repository, you will need a github account with collaborator status. Write access is available for Biopython developers (including all those who previously had CVS commit rights).

This is normally given on a case by case basis, and the best place to discuss getting write access is on the Biopython Development mailing list.

Once you have access, see the instructions on GitUsage

Migration from CVS

Most of the other Open Bioinformatics Foundation projects migrated from CVS to Subversion (SVN). Biopython had been considering moving from CVS to SVN for a while, but instead moved to git in September 2009. Note that BioRuby also uses github.

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