Python 3.13.1 Release December 2025 News //top\\ ❲4K · 480p❳

(Note: As of my current knowledge cutoff in October 2023, Python 3.13 is not yet finalized; this is a speculative, scenario-based article.)

The 3.13.1 release is but about stability and polish . Here are the headline fixes and improvements: python 3.13.1 release december 2025 news

A subtle bug in the new asyncio.TaskGroup could lead to leaked coroutines if a child task was cancelled mid-cleanup. The patch tightens cancellation semantics and improves performance of asyncio.run() by 12% for short-lived tasks. (Note: As of my current knowledge cutoff in