- Python 2.5
- Download the release
- What’s New?
- Documentation
- Files, MD5 checksums, signatures and sizes
- The PSF
- Download the latest version of Python
- Sources
- Alternative Implementations
- History
- Release Schedules
- Information about specific ports, and developer info
- OpenPGP Public Keys
- Other Useful Items
- Want to contribute?
Python 2.5
Python 2.5 was released on September 19th 2006. There’s a bunch of places you can look for more information on what’s new in this release — see the «What’s New» section further down this page.
This is a final release, and should be suitable for production use.
PEP 356 includes the schedule and will be updated as the schedule evolves. At this point, any testing you can do would be greatly, greatly appreciated.
Extension authors should note that changes to improve Python’s support for 64 bit systems mean that some C extension modules may very well break. This post has some pointers to more information for C extension authors.
Please see the separate bugs page for known issues and the bug reporting procedure.
Download the release
Starting with the Python 2.4 releases the Windows Python installer is being distributed as a Microsoft Installer (.msi) file. To use this, the Windows system must support Microsoft Installer 2.0. Just save the installer file, Python-2.5.msi, to your local machine, then double-click python-2.5.msi to find out if your machine supports MSI. If it doesn’t, you’ll need to install Microsoft Installer first. Many other packages (such as Word and Office) also include MSI, so you may already have it on your system. If not, you can download it freely from Microsoft for Windows 95, 98 and Me and for Windows NT 4.0 and 2000. Windows XP and later already have MSI; many older machines will already have MSI installed.
The new format installer allows for automated installation and many other shiny new features. There are also separate installers for Win64-Itanium users (on XP/2003 64-bit Itanium Edition) — Python-2.5.ia64.msi and for Win64 users on AMD64 machines (on XP/2003/Vista x64 Edition) — Python-2.5.amd64.msi.
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.
Users of Mac OS X 10.3 and later can install a universal binary (suitable for both PowerPC and Intel machines) from python-2.5-macosx.dmg . Download to the desktop and open the .dmg file to install.
All others should download either python-2.5.tgz or python-2.5.tar.bz2, the source archive. The tar.bz2 is considerably smaller, so get that one if your system has the appropriate tools to deal with it. Unpack it with tar -zxvf Python-2.5.tgz (or bzcat Python-2.5.tar.bz2 | tar -xf -). Change to the Python-2.5 directory and run the «./configure», «make», «make install» commands to compile and install Python.
Since this is a new version of Python, you may want to use the «make altinstall» command instead of «make install» — this will install a «python2.5» binary without touching the existing «python» binary.
The source archive is also suitable for Windows users who feel the need to build their own version.
What’s New?
- See some of 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.
- PEP 356 has information on a bunch of the new features added in 2.5, as well as pointers to the relevant PEPs.
- A detailed list of the changes in Python 2.5 can be found in the release notes, or the Misc/NEWS file in the source distribution.
- IDLE has its own release notes, or see the Lib/idlelib/NEWS.txt file in the source distribution.
- For the full list of changes, you can poke around in Subversion.
Documentation
The documentation has also been updated:
Files, MD5 checksums, signatures and sizes
bc1b74f90a472a6c0a85481aaeb43f95 Python-2.5.tgz (11019675 bytes, signature)
ddb7401e711354ca83b7842b733825a3 Python-2.5.tar.bz2 (9357099 bytes, signature)
33fffe927e4a84aa728d7a47165b2059 python-2.5.msi (10695680 bytes, signature)
c9ebc47dfab4fdc78d895ed6ab715db0 python-2.5.amd64.msi (10889216 bytes, signature)
dec95012739692625939e3ec6572fa5f python-2.5.ia64.msi (12986368 bytes, signature)
9ea85494251357970d83a023658fddc7 python-2.5-macosx.dmg (18749464 bytes, signature)
d8bfc10c7fd6505271ef5c755999c7cc Python25.chm (4160038 bytes, signature)
The signatures above were generated with GnuPG using release manager Anthony Baxter’s public key which has a key id of 6A45C816.
The PSF
The Python Software Foundation is the organization behind Python. Become a member of the PSF and help advance the software and our mission.
- About
- Applications
- Quotes
- Getting Started
- Help
- Python Brochure
- All releases
- Source code
- Windows
- macOS
- Other Platforms
- License
- Alternative Implementations
- Docs
- Audio/Visual Talks
- Beginner’s Guide
- Developer’s Guide
- FAQ
- Non-English Docs
- PEP Index
- Python Books
- Python Essays
- Diversity
- Mailing Lists
- IRC
- Forums
- PSF Annual Impact Report
- Python Conferences
- Special Interest Groups
- Python Logo
- Python Wiki
- Code of Conduct
- Community Awards
- Get Involved
- Shared Stories
- Arts
- Business
- Education
- Engineering
- Government
- Scientific
- Software Development
- Python News
- PSF Newsletter
- PSF News
- PyCon US News
- News from the Community
- Python Events
- User Group Events
- Python Events Archive
- User Group Events Archive
- Submit an Event
- Developer’s Guide
- Issue Tracker
- python-dev list
- Core Mentorship
- Report a Security Issue
Download the latest version of Python
All Python releases are Open Source. Historically, most, but not all, Python releases have also been GPL-compatible. The Licenses page details GPL-compatibility and Terms and Conditions.
Sources
For most Unix systems, you must download and compile the source code. The same source code archive can also be used to build the Windows and Mac versions, and is the starting point for ports to all other platforms.
Download the latest Python 3 source.
Alternative Implementations
This site hosts the «traditional» implementation of Python (nicknamed CPython). A number of alternative implementations are available as well.
History
Python was created in the early 1990s by Guido van Rossum at Stichting Mathematisch Centrum in the Netherlands as a successor of a language called ABC. Guido remains Python’s principal author, although it includes many contributions from others.
Release Schedules
See Status of Python Versions for all an overview of all versions, including unsupported.
Information about specific ports, and developer info
OpenPGP Public Keys
Source and binary executables are signed by the release manager or binary builder using their OpenPGP key. Release files for currently supported releases are signed by the following:
- Thomas Wouters (3.12.x and 3.13.x source files and tags) (key id: A821E680E5FA6305)
- Pablo Galindo Salgado (3.10.x and 3.11.x source files and tags) (key id: 64E628F8D684696D)
- Steve Dower (Windows binaries) (key id: FC62 4643 4870 34E5)
- Łukasz Langa (3.8.x and 3.9.x source files and tags) (key id: B269 95E3 1025 0568)
- Ned Deily (macOS binaries, 3.7.x / 3.6.x source files and tags) (key ids: 2D34 7EA6 AA65 421D, FB99 2128 6F5E 1540, and Apple Developer ID DJ3H93M7VJ)
- Larry Hastings (3.5.x source files and tags) (key id: 3A5C A953 F73C 700D)
- Benjamin Peterson (2.7.z source files and tags) (key id: 04C3 67C2 18AD D4FF and A4135B38)
Release files for older releases which have now reached end-of-life may have been signed by one of the following:
- Anthony Baxter (key id: 0EDD C5F2 6A45 C816)
- Georg Brandl (key id: 0A5B 1018 3658 0288)
- Martin v. Löwis (key id: 6AF0 53F0 7D9D C8D2)
- Ronald Oussoren (key id: C9BE 28DE E6DF 025C)
- Barry Warsaw (key ids: 126E B563 A74B 06BF, D986 6941 EA5B BD71, and ED9D77D5)
You can import a person’s public keys from a public keyserver network server you trust by running a command like:
or, in many cases, public keys can also be found at keybase.io. On the version-specific download pages, you should see a link to both the downloadable file and a detached signature file. To verify the authenticity of the download, grab both files and then run this command:
gpg --verify Python-3.6.2.tgz.asc
Note that you must use the name of the signature file, and you should use the one that’s appropriate to the download you’re verifying.
Other Useful Items
- Looking for 3rd party Python modules? The Package Index has many of them.
- You can view the standard documentation online, or you can download it in HTML, PostScript, PDF and other formats. See the main Documentation page.
- Information on tools for unpacking archive files provided on python.org is available.
- Tip: even if you download a ready-made binary for your platform, it makes sense to also download the source. This lets you browse the standard library (the subdirectory Lib) and the standard collections of demos (Demo) and tools (Tools) that come with it. There’s a lot you can learn from the source!
- There is also a collection of Emacs packages that the Emacsing Pythoneer might find useful. This includes major modes for editing Python, C, C++, Java, etc., Python debugger interfaces and more. Most packages are compatible with Emacs and XEmacs.
Want to contribute?
Want to contribute? See the Python Developer’s Guide to learn about how Python development is managed.
- About
- Applications
- Quotes
- Getting Started
- Help
- Python Brochure
- All releases
- Source code
- Windows
- macOS
- Other Platforms
- License
- Alternative Implementations
- Docs
- Audio/Visual Talks
- Beginner’s Guide
- Developer’s Guide
- FAQ
- Non-English Docs
- PEP Index
- Python Books
- Python Essays
- Diversity
- Mailing Lists
- IRC
- Forums
- PSF Annual Impact Report
- Python Conferences
- Special Interest Groups
- Python Logo
- Python Wiki
- Code of Conduct
- Community Awards
- Get Involved
- Shared Stories
- Arts
- Business
- Education
- Engineering
- Government
- Scientific
- Software Development
- Python News
- PSF Newsletter
- PSF News
- PyCon US News
- News from the Community
- Python Events
- User Group Events
- Python Events Archive
- User Group Events Archive
- Submit an Event
- Developer’s Guide
- Issue Tracker
- python-dev list
- Core Mentorship
- Report a Security Issue
