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Tue Jul 13 10:03:47 CEST 2010 · https://mail.python.org/pipermail/python-dev/2010-July/101874.html

On Tue, Jul 13, 2010 at 12:26 AM, John Arbash Meinel
<john.arbash.meinel at gmail.com> wrote:
>>>> r"testing \" backslash and quote"
> 'testing \\" backslash and quote'
>
> It happens that this is the behavior I want, but it seemed just as
> likely to be an error. I tested it with python2.5 and 2.6 and got the
> same results.

The behaviour does appear to be explicitly documented in the language reference:

"""
When an 'r' or 'R' prefix is present, a character following a
backslash is included in the string without change, and all
backslashes are left in the string. For example, the string literal
r"\n" consists of two characters: a backslash and a lowercase 'n'.
String quotes can be escaped with a backslash, but the backslash
remains in the string; for example, r"\"" is a valid string literal
consisting of two characters: a backslash and a double quote; r"\" is
not a valid string literal (even a raw string cannot end in an odd
number of backslashes).
"""

Schiavo
Simon

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Showing content from https://mail.python.org/pipermail/python-dev/2010-July/101874.html below:

[Python-Dev] Intended behavior of backlash in raw strings