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  • Python Success Stories

    ...Python itself, either in scalability or stability. Wing IDE can handle software projects with thousands of Python files, and in many cases can run for weeks without problems. To our knowledge, we have yet to see Wing IDE crash because of a flaw in the Python interpreter or its standard libraries. Mixed-language Development Python is almost always fast enough but we did run into a few cases where the interpreter did introduce too much overhead. The Wing IDE debugger and the source code analysis...

  • Release – Python 3.11.0b1

    Version: None

    Released: May 8, 2022

    This is a beta preview of Python 3.11 Python 3.11 is still in development. 3.11.0b1 is the first of four planned beta release previews. Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to prepare their projects to support …

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  • Release – Python 3.14.0rc1

    Version: None

    Released: July 22, 2025

    It's the first 3.14 release candidate! https://www.python.org/downloads/release/python-3140rc1/ This is the first release candidate of Python 3.14 This release, 3.14.0rc1, is the penultimate release preview. Entering the release candidate phase, only reviewed code changes which are clear bug fixes are allowed between this release candidate and the final release. The …

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  • Release – Python 3.12.0rc2

    Version: None

    Released: Sept. 6, 2023

    This is the second release candidate of Python 3.12.0 This release, 3.12.0rc2, is the last release preview for Python 3.12. There will be no ABI changes from this point forward in the 3.12 series. The intent is for the final release of 3.12.0, scheduled for Monday, 2023-10-02, to be …

  • Release – Python 3.12.0rc3

    Version: None

    Released: Sept. 19, 2023

    This is the third release candidate of Python 3.12.0 This release, 3.12.0rc3, is the absolutely last release preview for Python 3.12. There will be no ABI changes from this point forward in the 3.12 series. The intent is for the final release of 3.12.0, scheduled for Monday, 2023-10-02, to …

  • Release – Python 3.12.0rc1

    Version: None

    Released: Aug. 6, 2023

    This is the first release candidate of Python 3.12.0 This release, 3.12.0rc1, is the penultimate release preview. Entering the release candidate phase, only reviewed code changes which are clear bug fixes are allowed between this release candidate and the final release. The second candidate (and the last planned release …

  • Release – Python 3.14.0a5

    Version: None

    Released: Feb. 11, 2025

    Here comes the antepenultimate alpha. This is an early developer preview of Python 3.14 Major new features of the 3.14 series, compared to 3.13 Python 3.14 is still in development. This release, 3.14.0a5, is the fifth of seven planned alpha releases. Alpha releases are intended to make it easier to …

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  • Python Success Stories

    ...interpreter for a new mini-language. And if I have an unusual case that needs full Python, it is available to me. The world and the program to support it grew in parallel. As I came up with new ideas for structures for spots, I would write new utility functions like nesw() to create them easily. I could watch Nat play the game, see what he wanted it to do, and add features quickly. Many of Python's features (interpreted code, object orientation, garbage collection, lists and dictionaries) sup...

  • Python 2.4.5 Release

    ...interpreter, or of Python applications. This release includes just a small number of fixes, primarily preventing crashes of the interpreter in certain boundary cases. Python 2.5 is the latest release of Python. This release of the older 2.4 code is to provide bug fixes for people who are still using Python 2.4. This is the last planned release in the Python 2.4 series - future maintenance releases of Python will be in the 2.5 series, starting of course with 2.5.1. We have decided not to include ...

  • Release – Python 2.4.5

    Version: None

    Released: March 11, 2008

    Python 2.4 is now in security-fix-only mode. No new features are being added, and bugs are not fixed anymore unless they affect the stability and security of the interpreter, or of Python …

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  • Proposed Improvements to Module Cleanup

    ...Python 1.5.1. Contents: Algorithms Motivation Problems and Questions Revised version Based on some comments I received and some more thinking, I've changed this a bit since my web posting on this subject. Significant Changes are indicated in the text by [italicized remarks in square brackets]. Algorithms When a Python interpreter is deleted, its variables and modules are "cleared carefully" in a partially specified order. The operation "clear carefully" is define...

  • Release – Python 3.14.0rc3

    Version: None

    Released: Sept. 18, 2025

    It's 🪄 finally 🪄 the final 3.14 release candidate! https://www.python.org/downloads/release/python-3140rc3/ Note: It's another magic release. We fixed another bug that required bumping the magic number stored in Python bytecode (.pyc) files. This means file .pyc files created for rc2 cannot be used for rc3, and they'll be recompiled. …

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  • Release – Python 3.14.0rc2

    Version: None

    Released: Aug. 14, 2025

    It's the final 🪄 penultimate 🪄 3.14 release candidate! Note: rc2 was originally planned for 2025-08-26, but we fixed a bug that required bumping the magic number stored in Python bytecode (.pyc) files. This means .pyc files created for rc1 cannot be used for rc2, and they'll be …

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  • PSF Contributor Agreement for Python

    ...Python Contributor Agreement This Contributor Agreement is between Python Software Foundation (“PSF”) and the individual or other entity identified below (“the Contributor”): Contributor: __________________________________________ Address: __________________________________________ __________________________________________ Email: __________________________________________ Contributor offers to license certain software (a “Contrib...

  • Release – Python 3.7.14

    Version: None

    Released: Sept. 6, 2022

    Note: The release you are looking at is a security bugfix release for the legacy 3.7 series which has now reached end-of-life and is no longer supported. See the downloads page for currently supported versions of Python. The final source-only security fix release for 3.7 was 3.7.17. Please see …

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  • Release – Python 3.8.16

    Version: None

    Released: Dec. 6, 2022

    This is a security release of Python 3.8 Note: The release you're looking at is Python 3.8.16, a security bugfix release for the legacy 3.8 series. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3.11.x here. Security content in this …

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  • Python Success Stories

    ...Python and Jython, the Java implementation of Python, were chosen because they would allow both the PowerPC and Java implementations of the PanMachine to execute the same user interface layouts. Python, implemented in C, was used on the PowerPC, and Jython, implemented in Java, was used in the browser applet. Implementation in Python Re-implementation using Python went smoothly. The Python language interpreter and support libraries are written in C and can be compiled with most C compilers. I...

  • Python Success Stories

    ...Python-scripted HTML. Some of the modules, such as the search spider, GUI, and HTTP server, were written in Python. For performance reasons, others, such as the query engine, indexer, and HTML parser, use the Python/C API to incorporate functionality written in C. The C-based search engine core was also wrapped as a Python extension module. Some C++ is used in the interfaces to key third party technologies. Python's flexibility in this regard gave us a wide degree of flexibility in integration. ...

  • Notes

    ...Python 2.1.1 (final) ? The following bugs were fixed: [ #441664 ] Python crash on del of a slice of a mmap [ #438050 ] configure doesn't look for poll.h in sys [ #437487 ] 2.1 build on Solaris fails if CC is set [ #441527 ] unixccompiler preprocessor broken What's New in Python 2.1.1c1 ? Python 2.1.1 comes with the new, GPL-compatible PSF licence. Several insecurities in dict comparison as well as a scoping bug, that could lead to the Python interpreter crashing were fixed. Python should ...

  • Release – Python 3.12.6

    Version: None

    Released: Sept. 6, 2024

    This is the sixth maintenance release of Python 3.12 Python 3.12 is the newest major release of the Python programming language, and it contains many new features and optimizations. 3.12.6 is the latest maintenance release, containing about 90 bugfixes, build improvements and documentation changes since 3.12.5. This is an expedited …

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