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f-strings do not show warnings about invalid escapes #105800

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f-strings do not show warnings about invalid escapes#105800
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3.12only security fixes3.13only security fixes

Description

@pablogsal
pablogsal
opened on Jun 14, 2023

In 3.12 and 3.13, f-strings are not warning about invalid escapes that get warnings in real strings. This seems like a bug.

>>> f'\?'
'\\?'
>>> len(f'\?')
2
>>> '\?'
<stdin>:1: SyntaxWarning: invalid escape sequence '\?'
'\\?'

_Originally posted by @terryjreedy in https://github.com/python/cpython/issues/105784#issuecomment-1591828755_
            

<!-- gh-linked-prs -->
### Linked PRs
* gh-105801
* gh-105806
<!-- /gh-linked-prs -->

Activity

  1. pablogsal
    added a commit that references this issue on Jun 14, 2023

    pythongh-105800: Issue SyntaxWarning in f-strings for invalid escape …

    8a4b38e
  2. AlexWaygood
    added
    3.12only security fixes
    3.13only security fixes
    on Jun 14, 2023
  3. miss-islington
    added a commit that references this issue on Jun 15, 2023

    pythongh-105800: Issue SyntaxWarning in f-strings for invalid escape …

    e3a46f8
  4. pablogsal
    added a commit that references this issue on Jun 15, 2023

    gh-105800: Issue SyntaxWarning in f-strings for invalid escape sequen…

    12b6d84

  5. pablogsal commented on Jun 15, 2023

    @pablogsal
    pablogsal
    on Jun 15, 2023
    MemberAuthor

    CC: @terryjreedy

  6. pablogsal
    closed this as completedon Jun 15, 2023
  7. pablogsal
    changed the title [-]f-strings are not warning about invalid escapes[/-] [+]f-strings do not warning about invalid escapes[/+] on Jun 15, 2023
  8. pablogsal
    changed the title [-]f-strings do not warning about invalid escapes[/-] [+]f-strings do not show warnings about invalid escapes[/+] on Jun 15, 2023
  9. pablogsal
    added a commit that references this issue on Jun 15, 2023

    [3.12] gh-105800: Issue SyntaxWarning in f-strings for invalid escape…

    638c2ba
  10. carljm
    added a commit that references this issue on Jun 15, 2023

    Merge branch 'main' into modulelocals

    166aca9
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