Python 2.5.1 has been replaced by a newer bugfix release of Python. Please download Python 2.5.6 instead.
Python 2.5.1 was released on April 18th, 2007.
This is the first 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, over 150 bugs and patches have been squished since Python 2.5, including a fair number in the new AST compiler (an internal implementation detail of the Python interpreter).
See the detailed release notes for more details.
Since the release candidate, we have backed out a couple of small changes that caused 2.5.1 to behave differently to 2.5. Again, see the release notes for more.
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-2.5.1.msi
For Win64-Itanium users: python-2.5.1.ia64.msi
For Win64-AMD64 users: python-2.5.1.amd64.msi
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.
Windows users may also be interested in Mark Hammond's win32all package, available from Sourceforge. win32all adds a number of Windows-specific extensions to Python, including COM support and the Pythonwin IDE.
For MacOS X 10.3 and later: python-2.5.1-macosx.dmg. This is a Universal installer.
The Universal OS X image contains an installer for python 2.5.1 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.
gzip-compressed source code: Python-2.5.1.tgz
bzip2-compressed source code: Python-2.5.1.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-2.5.1.tgz (or bzcat Python-2.5.1.tar.bz2 | tar -xf -). Change to the Python-2.5.1 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.
- 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 2.5.1 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: