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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Change in Flag enum behaviour in v3.11rc2","articleBody":"# Bug report\r\n\r\nThe default behaviour of Flag enums has chenged between Python v3.10 and v3.11\r\n\r\n# Your environment\r\n\r\nPython v3.11rc2 on macOS\r\n\r\nThe following script...\r\n\r\n```\r\nfrom enum import Flag\r\n\r\nclass MethodHint(Flag):\r\n    HiddenText = 0x10\r\n    DigitsOnly = 0x01\r\n    LettersOnly = 0x02\r\n    OnlyMask = 0x0f\r\n\r\nprint(MethodHint.HiddenText|MethodHint.OnlyMask)\r\n```\r\n\r\n...raises a ValueError in v3.11 and prints...\r\n\r\nMethodHint.HiddenText|OnlyMask|LettersOnly|DigitsOnly\r\n\r\nin v3.10.\r\n\r\nWhile it's not particularly sensible to bitwise-or a mask it is a significant change of behaviour without a deprecation period.\r\n\r\nIt will be common to have a mask value that covers more bits than currently defined when allowing for future expansion of the flags.","author":{"url":"https://github.com/philthompson10","@type":"Person","name":"philthompson10"},"datePublished":"2022-09-16T13:45:17.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/96865/cpython/issues/96865"}