gh-146310: Fix ensurepip to treat empty WHEEL_PKG_DIR as unset#146357
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kimimgo wants to merge 3 commits intopython:mainfrom
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gh-146310: Fix ensurepip to treat empty WHEEL_PKG_DIR as unset#146357kimimgo wants to merge 3 commits intopython:mainfrom
kimimgo wants to merge 3 commits intopython:mainfrom
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Path('') resolves to CWD, so an empty WHEEL_PKG_DIR string caused
ensurepip to search the current working directory for wheel files.
Add a truthiness check to treat empty strings the same as None.
vstinner
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Mar 24, 2026
Misc/NEWS.d/next/Library/2026-03-24-03-49-50.gh-issue-146310.WhlDir.rst
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Per @vstinner: - Simplify to 'if _pkg_dir:' instead of walrus + is not None - Replace mock-based test with import_fresh_module for both '' and None - Reword NEWS to describe old behavior instead of fix
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Thanks @vstinner! Updated all three points:
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vstinner
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needs backport to 3.13
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Fixes #146310
Path('')resolves to the current working directory (PosixPath('.')), so whenWHEEL_PKG_DIRis an empty string (notNone),ensurepipsearches CWD for wheel files. This can cause unexpected behavior or crashes if CWD contains files matchingpip-*.whl.Changes
Lib/ensurepip/__init__.py: Add truthiness check so empty strings are treated the same asNoneLib/test/test_ensurepip.py: Add test verifying emptyWHEEL_PKG_DIRdoes not search CWDBefore/After