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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"More strict format checks in PyUnicode_FromFormat()","articleBody":"`PyUnicode_FromFormat()` is loose in checking for errors in the format string. If it encounter an invalid format specifier, it silently outputs the rest of the format string. And it allows digits between `%`s: `\"%123%\"` is interpreted the same as `\"%%\"`, i.e. as literal `%`.\r\n\r\nIt was not a big problem, because it is expected that the user of the C API do not make mistakes in the format string, and incorrect format string can easily lead to crash. But id did not help either.\r\n\r\nRecently it was discussed on Discuss: https://discuss.python.org/t/pyunicode-fromformat-allow-format-with-precision/17873.","author":{"url":"https://github.com/serhiy-storchaka","@type":"Person","name":"serhiy-storchaka"},"datePublished":"2022-08-08T11:33:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/95781/cpython/issues/95781"}