[New-bugs-announce] [issue28827] f-strings: format spec should not accept unicode escapes

[Yury Selivanov]

New submission from Yury Selivanov:

Right now, Python 3.6b4 happily accepts the following:

    >>> f'{10:02\N{LATIN CAPITAL LETTER X}}'
    '0A'
    >>> f'{10:02X}'
    '0A'

I think that the first line should not be accepted (as we now don't accept escaped open curly brace).

At least this should be documented in the PEP as a thing that shouldn't be relied upon, i.e. something that might not be supported in the future versions.

----------
components: Interpreter Core
messages: 281924
nosy: eric.smith, gvanrossum, serhiy.storchaka, yselivanov
priority: normal
severity: normal
status: open
title: f-strings: format spec should not accept unicode escapes
type: behavior
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28827>
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