PEP 699: Remove Private Dict Version Field Added In PEP 509
October 2, 2022
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PEP 509 introduced a private ma_version_tag field for dictionaries to allow optimizations in CPython and extension libraries. This PEP proposes to rescind PEP 509 and declare the field an implementation detail, as it has already been superseded by alternatives. This will further allow the field to be reused for future optimization.>>> Read the Full Story at Newest Python PEPs
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