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Sat May 12 00:27:51 CEST 2007 · https://mail.python.org/pipermail/python-dev/2007-May/073073.html

Martin v. Löwis wrote:
>> This is what prompted my question, actually: in Py3k, in the
>> str/unicode unification branch, r"\u1234" changes meaning: before the
>> unification, this was an 8-bit string, where the \u was not special,
>> but now it is a unicode string, where \u *is* special.
>>     
>
> That is true for non-raw strings also: the meaning of "\u1234" also
> changes.
>
> However, traditionally, there was *no* escaping mechanism in raw strings
> in Python, and I feel that this is a good principle, because it is
> easy to learn (if you leave out the detail that \ can't be the last
> character in a raw string - which should get fixed also, IMO).
+1

Michael Foord

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[Python-Dev] \u and \U escapes in raw unicode string literals