Versions

    Currently, the three main versions of Python are:  2.5,  2.6,  and  3

    Version 3 is the most recent.
    It is intentionally backwards-incompatible with Version 2.
    Python 3.1 is a development release.
    Python 3.0 is now in bugfix-only mode.

    Although version 3 is the obvious choice
    it may be necessary to use version 2.5 or 2.6
    for compatibility with other programs until they are upgraded.

    Version 2.6.1 is a bugfix release of version 2.6 (04 Dec 2008).

    Version 2.5.4 is the final bugfix release of version 2.5 (23 Dec 2008).