Python: Cleanup Cycle for CPython Internals

A wave of merges tightened up resource handling across asyncio, the profiler's stack collector, and configparser, while two independent fixes for the same configparser regression surfaced at once. Backport traffic to 3.13, 3.14, and 3.15 shows the project actively hardening recent releases.

Duration: PT2M35S

Episode overview

This episode is a short developer briefing from Python.

It explains recent repository work in plain language.

  • Show: Python
  • Published: 2026-08-26T13:07:53Z
  • Audio duration: PT2M35S

Transcript excerpt

This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.

Good day, it's August 26th, and here's what moved in CPython.

The clearest pattern today is resource cleanup. In asyncio, tonghuaroot's PR 156366 closes a socket leak in the proactor event loop's accept path, and a related PR, 156401, fixes the same class of problem for datagram and pipe endpoints, ensuring failed transport creation doesn't leave sockets or pipes dangling.…

Second theme: the profiler's stack collector got two related correctness fixes from Pablo Galindo Salgado, both merged to main and backported to 3.15. PR 154093 makes elided stack counting consistent, and PR 154099 stops the collector from duplicating diff line values. Alongside those, PR 154101 preserves replay…

Third: configparser had a live regression around space delimiters, and two independent contributors — shoemoney with PR 156375 and sundeep8967 with PR 156382 — submitted overlapping fixes the same day. Both trace the bug to the ReDoS-hardening regex change from PR 146333, which inadvertently let a greedy whitespace…

A few other items worth flagging: pablogsal's PR 153587 lays foundational tokenizer primitives, moving state away from raw buffer pointers — early groundwork rather than a user-facing change.…

W…

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