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From: Left Right <olegsivokon@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: backslash in triple quoted string
Date: Thu, 8 May 2025 08:05:54 +0200
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Bytes: 8108

Also, it appears that the change linked above is a lie:

https://docs.python.org/3/reference/lexical_analysis.html#grammar-token-pyt=
hon-grammar-longstringitem

According to the grammar, any character can follow backslash in a
valid Python program. The warning / error raised by this code should
not be a syntax error / warning because the syntax is correct.

On Thu, May 8, 2025 at 7:54=E2=80=AFAM Left Right <olegsivokon@gmail.com> w=
rote:
>
> I think it could be this:
>
> A backslash-character pair that is not a valid escape sequence now
> generates a SyntaxWarning, instead of DeprecationWarning. For example,
> re.compile("\d+\.\d+") now emits a SyntaxWarning ("\d" is an invalid
> escape sequence, use raw strings for regular expression:
> re.compile(r"\d+\.\d+")). In a future Python version, SyntaxError will
> eventually be raised, instead of SyntaxWarning. (Contributed by Victor
> Stinner in gh-98401.)
>
> Found in:
> https://docs.python.org/3/whatsnew/3.12.html#other-language-changes
>
> It's not supposed to crash your program though. If the program crashes
> because of it, it's a bug in Python.
>
> On Thu, May 8, 2025 at 7:00=E2=80=AFAM Bob van der Poel via Python-list
> <python-list@python.org> wrote:
> >
> > Did something change in python buggering up my use of a "\ " sequence i=
n a
> > triple quoted string?
> >
> > I have yet to go through my archive on the program, but I tried to run =
it
> > today and it crashed quite spectacularly when it hit a """ .... """ lin=
e
> > being used as a comment at the top of a function. I changed the "\" to =
a
> > "/" and all is well now.
> >
> >
> > --
> >
> > **** Listen to my FREE CD at http://www.mellowood.ca/music/cedars ****
> > Bob van der Poel ** Wynndel, British Columbia, CANADA **
> > EMAIL: bob@mellowood.ca
> > WWW:   http://www.mellowood.ca
> > --
> > https://mail.python.org/mailman/listinfo/python-list