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gh-81773: Avoid parsing sys.version string in sysconfig#146149

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vstinner wants to merge 6 commits intopython:mainfrom
vstinner:sysconfig_py_version
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gh-81773: Avoid parsing sys.version string in sysconfig#146149
vstinner wants to merge 6 commits intopython:mainfrom
vstinner:sysconfig_py_version

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@vstinner vstinner commented Mar 19, 2026

No longer parse sys.version string to create sysconfig._PY_VERSION. Add _sysconfig.PY_VERSION constant.

No longer parse sys.version string to create sysconfig._PY_VERSION.
Add _sysconfig._PY_VERSION constant.
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cc @FFY00

* Move also py_version_short and py_version_nodot to _sysconfig.
* Use _sysconfig.config_vars() on all platforms, no only Windows.
Comment on lines -534 to -535
_CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
_CONFIG_VARS['py_version_nodot'] = _PY_VERSION_SHORT_NO_DOT
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I'm not sure if it's worth it to move py_version_short and py_version_nodot to _sysconfig, since they can be easily built in Python.

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I reverted py_version_short and py_version_nodot changes.

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Ping @FFY00.

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I'm not longer sure that this change is worth it. _PY_VERSION = sys.version.split()[0] just works. I close my PR.

@vstinner vstinner closed this Mar 26, 2026
@vstinner vstinner deleted the sysconfig_py_version branch March 26, 2026 17:33
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