Python: IDLE Gets a Major Reliability Sweep
Serhiy Storchaka landed or opened roughly a dozen IDLE fixes this cycle, closing out long-standing bugs in the shell, search dialogs, and file handling, while separate performance and correctness work touched the parser, Unicode data, and reference-counted objects.
Duration: PT2M34S
Episode overview
This episode is a short developer briefing from Python.
It explains recent repository work in plain language.
- Show: Python
- Published: 2026-09-17T13:09:17Z
- Audio duration: PT2M34S
Transcript excerpt
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Good day. It's September 17th, and today's Python activity has one clear center of gravity: IDLE.
Serhiy Storchaka pushed through a wave of fixes addressing bugs that in some cases date back over a decade. PR 157594 fixes shell parsing so that output history no longer gets misread as code, which was breaking calltips and auto-indent. PR 157593 stops Tab from triggering unwanted autocomplete inside strings. PR…
A second theme is correctness in core interpreter internals. Victor Stinner's PR 157591 removes risky double-evaluation patterns from the Py_MIN and Py_MAX macros across several modules including dict and long objects. His companion PR 157587 replaces a soft-deprecated allocation call in the string escape decoder…
Third, standards and performance: PR 157374 from Pablo Galindo reduces parser allocations by restructuring how tokens and names are cached, with measurable speed and memory gains reported. And two competing PRs, 157634 and 157645, both update Unicode data to version 18.0.0, including a simplification to grapheme…
What's next: expect more IDLE backports following the search-dialog pattern, and keep an eye on the duplicate Unicode 18 PRs resolving to one. The parser…
That…
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