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Python 2.3.7

We are pleased to announce Python 2.3.7 (final), a bugfix release of Python 2.3, on March 11, 2008.

Important: 2.3.7 is a source-only release. If you need a binary release of 2.3, use 2.3.5. If you need the fixes that are included in this release, use 2.5.2 or later.

Python 2.3 is now well and truly in bugfix-only mode; no new features are being added, and only security critical bugs have been fixed. This release addresses a number of cases interpreter might have crashed in certain boundary conditions.

See the detailed release notes for more details.

Python 2.5 and Python 2.4 are newer releases of Python. This release of the older 2.3 code is to provide bug fixes for people who are still using Python 2.3.

For more information on the new features of Python 2.3 see the 2.3 highlights or consult Andrew Kuchling's What's New In Python for a more detailed view.

Since the release candidate, we received various reports that the this release may fail to build on current operating systems, in particular on OS X. We have made no attempt to fix these problems, as the release is targeted for systems that were current at the time Python 2.3 was originally released. For more recent systems, you might have to come up with work-arounds. For OS X in particular, try invoking:


Please see the separate bugs page for known issues and the bug reporting procedure.

See also the license

Download the release

As noted, is not providing binary installers for 2.3.7. Windows and Mac OS X users who cannot compile their own versions should continue to use the 2.3.5 installers. These installers are not vulnerable to PSF-2006-001.

gzip-compressed source code: Python-2.3.7.tgz

bzip2-compressed source code: Python-2.3.7.tar.bz2, the source archive.

The bzip2-compressed version is considerably smaller, so get that one if your system has the appropriate tools to deal with it.

Unpack the archive with tar -zxvf Python-2.3.7.tgz (or bzcat Python-2.3.7.tar.bz2 | tar -xf -). Change to the Python-2.3.7 directory and run the "./configure", "make", "make install" commands to compile and install Python. The source archive is also suitable for Windows users who feel the need to build their own version.

What's New?

  • See the highlights of the Python 2.3 release.
  • Andrew Kuchling's What's New in Python 2.3 describes the most visible changes since Python 2.2 in more detail.
  • A detailed list of the changes in 2.3.7 can be found in the release notes, or the Misc/NEWS file in the source distribution. This is a very short list - only security fixes have been included.
  • For the full list of changes, you can poke around in Subversion.


The documentation for 2.3.5 is still current for this release.

Files, MD5 checksums, signatures and sizes

0b4861edfaa6d8451458d5d7ed735e4a Python-2.3.7.tgz (8694077 bytes, signature)

fa73476c5214c57d0751fae527f991e1 Python-2.3.7.tar.bz2 (7352771 bytes, signature)

The signatures above were generated with GnuPG using release manager Martin v. Löwis's public key which has a key id of 7D9DC8D2.