Ezio Melotti <ezio.melo...@gmail.com> added the comment: The rule 1 makes sense, but it's not entirely obvious (people might consider bBaAzZ special too).
The "normal Python rules for backslash escapes but revert to the C behaviour of stripping the \ from unrecognised escapes" is not obvious either, and from r'[\A]' people might expect: 1) same as \A, (beginning of the string); 2) a letter 'A'; 3) a '\' or a letter 'A' (especially if they write it as '[\\A]'); This is why I suggested to raise an error (and refuse the temptation to guess), but on the other hand, if you consider 'A' a "normal" letter like 'C', having an error for \A would be incoherent. It would have been better if \C raised an error too (I don't see why that would appear in a regex, since re.escape doesn't escape C and the user has no reason to add the \), but now it's too late for that. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue13899> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
