[issue23622] Deprecate unrecognized backslash+letter escapes in re
Roundup Robot added the comment: New changeset 7384db2fce8a by Serhiy Storchaka in branch 'default': Fixed using deprecated escaping in regular expression in _strptime.py (issue23622). https://hg.python.org/cpython/rev/7384db2fce8a -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23622 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23622] Deprecate unrecognized backslash+letter escapes in re
Roundup Robot added the comment: New changeset 014031a4d398 by Serhiy Storchaka in branch 'default': Issue #23622: Unknown escapes in regular expressions that consist of ``'\'`` https://hg.python.org/cpython/rev/014031a4d398 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23622 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23622] Deprecate unrecognized backslash+letter escapes in re
Changes by Serhiy Storchaka storch...@gmail.com: -- resolution: - fixed stage: patch review - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23622 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23622] Deprecate unrecognized backslash+letter escapes in re
Changes by Serhiy Storchaka storch...@gmail.com: -- title: Deprecate unrecognized backslash+letter escapes - Deprecate unrecognized backslash+letter escapes in re ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23622 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23622] Deprecate unrecognized backslash+letter escapes
Changes by Chris Rebert pyb...@rebertia.com: -- nosy: +cvrebert ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23622 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23622] Deprecate unrecognized backslash+letter escapes
New submission from Serhiy Storchaka: Regular expressions use the backslash character for two functions: 1) to indicate special forms; 2) to allow special characters to be used without invoking their special meaning. If backslash + character is not recognized as special form (1), it interpreted in meaning (2). Usually new special forms have form backslash + ASCII letter, because unlike to other characters single ASCII letters do not have special meaning in any regular expression engine or programming language. This using the backslash with inner ASCII letter dangerous. Currently it means just this letter literally, but in future it can mean special form. For example \u and \U forms were added in 3.3 and this could break regular expression patters that use \u and \U before. To avoid possible breaking it makes sense to reject unrecognized backslash + ASCII letter sequences. Proposed patch adds deprecation warnings when unknown escape of ASCII letter is used. The idea was proposed by Matthew Barnett [1]. [1] http://permalink.gmane.org/gmane.comp.python.devel/151657 -- assignee: serhiy.storchaka components: Library (Lib), Regular Expressions files: re_deprecate_escaped_letters.patch keywords: patch messages: 237645 nosy: ezio.melotti, mrabarnett, pitrou, serhiy.storchaka priority: normal severity: normal stage: patch review status: open title: Deprecate unrecognized backslash+letter escapes type: enhancement versions: Python 3.5 Added file: http://bugs.python.org/file38406/re_deprecate_escaped_letters.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23622 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
