python / python/cpython

zipfile: Deduplicate reinitialization setup for ZipExtFile when seeking

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type-feature
Dominant language
Python
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Forks
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PR merge metrics
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Description

Feature or enhancement

Proposal:

ZipExtFile needs to be reinitialized if seeking back beyond it's current buffered data. The code to initialize and then reinitialize are in 2 locations and consolidating these into one location reduces the footprint for introducing potential bugs.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs
  • gh-121640

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  4. Open a pull request that references the issue number.

Research direction

Start in the zipfile implementation at ZipExtFile and inspect the two locations that initialize or reinitialize it during seeking. Consolidate those setup paths into one location, then verify that seeking back beyond buffered data still reinitializes correctly; linked PR gh-121640 provides context.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Refactor
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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