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Python 2.5.3 Release

Python 2.5.3

Python 2.5.3 has been replaced by a newer bugfix release of Python. Please download Python 2.5.6 instead.

Python 2.5.3 was released on December 19th, 2008.

This is the last bugfix release of Python 2.5. Python 2.5 is now in bugfix-only mode; no new features are being added. According to the release notes, about 80 bugs and patches have been addressed since Python 2.5.2, many of them improving the stability of the interpreter, and improving its portability. Future releases will only address security isses, and no binaries or documentation updates will be provided in future releases of Python 2.5.

If you want the latest production version of Python, use Python 2.7.2 or later.

See the detailed release notes for more details.

For more information on the new features of Python 2.5 see the 2.5 highlights or consult Andrew Kuchling's What's New In Python for a more detailed view.

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

See also the license.

Download the release


For x86 processors: python-2.5.3.msi

For Win64-Itanium users: python-2.5.3.ia64.msi

For Win64-AMD64 users: python-2.5.3.amd64.msi

This installer allows for automated installation and many other new features.

To use these installers, the Windows system must support Microsoft Installer 2.0. Just save the installer file to your local machine and then run it to find out if your machine supports MSI.

Windows XP and later already have MSI; many older machines will already have MSI installed.

If your machine lacks Microsoft Installer, you'll have to download it freely from Microsoft for Windows 95, 98 and Me and for Windows NT 4.0 and 2000.

Windows users may also be interested in Mark Hammond's pywin32 package, available from Sourceforge. pywin32 adds a number of Windows-specific extensions to Python, including COM support and the Pythonwin IDE.


For MacOS X 10.3 and later: python-2.5.3-macosx.dmg. This is a Universal installer.

The Universal OS X image contains an installer for python 2.5.3 that works on Mac OS X 10.3.9 and later, on both PPC and Intel Macs. The compiled libraries include both bsddb and readline.

Other platforms

gzip-compressed source code: Python-2.5.3.tgz

bzip2-compressed source code: Python-2.5.3.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-2.5.3.tgz (or bzcat Python-2.5.3.tar.bz2 | tar -xf -). Change to the Python-2.5.3 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 2.5 release.
  • Andrew Kuchling's What's New in Python 2.5 describes the most visible changes since Python 2.4 in more detail.
  • A detailed list of the changes in 2.5.3 can be found in the release notes, or the Misc/NEWS file in the source distribution.
  • For the full list of changes, you can poke around in Subversion.


The documentation has also been updated:

Files, MD5 checksums, signatures and sizes

a971f8928d6beb31ae0de56f7034d6a2 Python-2.5.3.tgz (11605520 bytes, signature)

655a0e63c00bbf1277092ea5c58e9b34 Python-2.5.3.tar.bz2 (9821271 bytes, signature)

5566b7420b12c53d1f2bba3b27a4c3a9 python-2.5.3.msi (11323904 bytes, signature)

887b2cfbbfec3d1966f8d63f206cf0d2 python-2.5.3.amd64.msi (11337728 bytes, signature)

99ce6ee0e871824e324cd98f0b795aa0 python-2.5.3.ia64.msi (13568512 bytes, signature)

924bb2ef0cfd932aab4f3f018a722bef python-2.5.3-macosx.dmg (11323904 bytes, signature)

ad881bc4e6755c57cbf5fa1cdd594369 Python25.chm (4182160 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.