[issue28590] fstring's '{' from escape sequences does not start an expression

Eric V. Smith added the comment: Thanks, Jason. I updated the PEP, so now I think the docs and PEP match the implementation. -- resolution: -> fixed stage: -> resolved status: open -> closed ___ Python tracker _

[issue28590] fstring's '{' from escape sequences does not start an expression

Roundup Robot added the comment: New changeset 1d8b8a67b657 by Jason R. Coombs in branch '3.6': Additionally show that a backslash-escaped opening brace is treated as a literal and thus triggers the single closing brace error, clarifying #28590. https://hg.python.org/cpython/rev/1d8b8a67b657 --

[issue28590] fstring's '{' from escape sequences does not start an expression

Jason R. Coombs added the comment: The reason that those test_no_escapes_for_braces assertions pass is because they're only dealing with opening curly braces and in an f-string, they're treated as literal opening braces. In the example you've given, the error occurs when the f-string handler

[issue28590] fstring's '{' from escape sequences does not start an expression

Jason R. Coombs added the comment: I've got a patch ready for this and will be applying it shortly after we update the spec. -- assignee: docs@python -> jason.coombs nosy: +jason.coombs ___ Python tracker

[issue28590] fstring's '{' from escape sequences does not start an expression

Eric V. Smith added the comment: I'm currently working on an update to PEP-498 to address this. I hope to have it completed after a sprint this weekend. -- ___ Python tracker __

[issue28590] fstring's '{' from escape sequences does not start an expression

Changes by Serhiy Storchaka : -- assignee: -> docs@python components: +Documentation -Interpreter Core nosy: +docs@python ___ Python tracker ___

[issue28590] fstring's '{' from escape sequences does not start an expression

Changes by SilentGhost : -- nosy: +eric.smith ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.pyth

[issue28590] fstring's '{' from escape sequences does not start an expression

New submission from 尤立宇: PEP 498 says: (https://www.python.org/dev/peps/pep-0498/#escape-sequences) Scanning an f-string for expressions happens after escape sequences are decoded. Because hex(ord('{')) == 0x7b , the f-string f'\u007b4*10}' is decoded to f'{4*10}' , which evaluates as the inte