Priti Patel praises South East Galvanisers for supporting industry in Witham
My energy company is insisting I switch to a smart meter even though my current one is still working. Can they really force me to change? DEAN DUNHAM has the surprising answer
Python 3.13.5 Patch Release Packed with Fixes & Stability Boosts
On June 11, 2025, the Python core team released Python 3.13.5, the fifth maintenance update to the 3.13 line. This release is not about flashy new language features, instead, it addresses some pressing regressions and bugs introduced in 3.13.4. The “.5” in the version number signals that this is a corrective, expedited update rather than a feature-driven milestone.
In this article, we’ll explore what motivated 3.13.5, catalog the key fixes, review changes inherited in the 3.13 stream, and discuss whether and how you should upgrade. We’ll also peek at implications for future Python releases.
What Led to 3.13.5 (Release Context)Python 3.13 — released on October 7, 2024 — introduced several significant enhancements over 3.12, including a revamped interactive shell, experimental support for running without a Global Interpreter Lock (GIL), and preliminary JIT infrastructure.
However, after releasing 3.13.4, the maintainers discovered several serious regressions. Thus, 3.13.5 was accelerated (rather than waiting for the next regular maintenance release) to correct these before they impacted a broader user base. In discussions preceding the release, it was noted the Windows extension module build broke under certain configurations, prompting urgent action.
Because of this, 3.13.5 is a “repair” release — its focus is bug fixes and stability, not new capabilities. Nonetheless, it also inherits and stabilizes many of the improvements introduced earlier in 3.13.
Key Fixes & CorrectionsWhile numerous smaller bugs are resolved in 3.13.5, three corrections stand out as primary drivers for the expedited update:
GH-135151 — Windows extension build failureUnder certain build configurations on Windows (for the non-free-threaded build), compiling extension modules failed. This was traced to the pyconfig.h header inadvertently enabling free-threaded builds. The patch restores proper alignment of configuration macros, ensuring extension builds succeed as before.
GH-135171 — Generator expression TypeError delayIn 3.13.4, generator expressions stopped raising a TypeError early when given a non-iterable. Instead, the error was deferred to the time of first iteration. 3.13.5 restores the earlier behavior of raising the TypeError at creation time when the supplied input is not iterable. This change avoids subtler runtime surprises for developers.
Go to Full ArticleColchester councillors back major merger with two other Essex districts
Exciting new festival where business meets pleasure is a hit success
Braintree MP says major infrastructure approvals is distraction from housing record
Fears new Essex special school for 150 children will cause traffic problems
Angelina Jolie's daughter Shiloh, 19, rocks punk makeover with VERY edgy lip piercing and platinum blonde hair
The Cotswolds are hotter than ever - and you don't need to be a millionaire to live there, with homes on the market for as little as £50,000. Here are the properties experts would snap up
Heartbroken family pay tribute to boy, eight, after he was 'murdered by his mother' in the family home
Top pharmacists issue fresh warning on paracetamol risk - after Trump's health chiefs links everyday painkiller to surge in autism cases
Essex funeral home raises thousands at charity golf day
Psychotherapist explains why people are convinced ancient Biblical prophecy the Rapture is happening TODAY- and how to navigate disappointment if you don't ascend to the Heavens
Half a million pensioners set to lose their winter fuel payments within four years
Asylum seeker jailed for sexual assault in Epping will be automatically deported due to length of prison sentence
MX Linux 25 reaches beta testing – complete with systemd
The new Debian-13 version of MX Linux, version 25, is looking very close to ready for release. A big change may divide its audience, though.…