On Mon, Mar 16, 2020 at 02:36:25PM +0900, Stephen J. Turnbull wrote: > Kyle Stanley writes: > > > The behavior is the same on Python 3.8.2: > > > > Python 3.8.2 (default, Feb 26 2020, 22:21:03) > > [GCC 9.2.1 20200130] on linux > > Type "help", "copyright", "credits" or "license" for more information.
> > >>> r'x\'y' > > "x\\'y" > > This looks like a defect to me. The "'" *is* being quoted. If it's a defect, it's one which goes all the way back to Python 1.5: [steve@ando ~]$ python1.5 >>> r'x\'y' "x\\'y" and is fully documented :-) [quote] Even in a raw literal, quotes can be escaped with a backslash, but the backslash remains in the result; 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). [/quote] https://docs.python.org/3/reference/lexical_analysis.html#literals > > > > Raw strings aren't quite fully raw, which is why you can't use raw > > > > strings for Windows paths: > > > > path = r'somewhere\some\folder\' > > > > doesn't work. The reason is that "raw" (semi-cooked?) strings are > > > > s/are/were/ intended for regexes[.] > > With all due respect to Steve d'A, I think that reason is inaccurate > (at least in MacPorts' Python 3.8.2). I get > > >>> path = r'somewhere\some\folder\' > File "<stdin>", line 1 > path = r'somewhere\some\folder\' > ^ > SyntaxError: EOL while scanning string literal > > The reason for that, I believe, is that the rightmost "'" is quoted, > and there is no "'" terminating the string literal. Yes, that's what I meant when I said "it doesn't work". And the reason it doesn't work, as I understand it, is that raw strings were designed for use in regular expressions. Regexes cannot end in an odd number of backslashes. -- Steven _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/55MHFCQNQGSKW7YZDYUZNPOFZI5XFBG5/ Code of Conduct: http://python.org/psf/codeofconduct/