New submission from Serhiy Storchaka: In some cases standard re module and third-party regex modules raise exceptions with different error messages.
1. re.match(re.compile('.'), 'A', re.I) re: Cannot process flags argument with a compiled pattern regex: can't process flags argument with a compiled pattern 2. re.compile('(?P<foo_123') re: unterminated name regex: missing > 3. re.compile('(?P<foo_123>a)(?P=foo_123') re: unterminated name regex: missing ) 4. regex.sub('(?P<a>x)', r'\g<a', 'xx') re: unterminated group name regex: missing > 5. re.sub('(?P<a>x)', r'\g<', 'xx') re: unterminated group name regex: bad group name 6. re.sub('(?P<a>x)', r'\g<a a>', 'xx') re: bad character in group name regex: bad group name 7. re.sub('(?P<a>x)', r'\g<-1>', 'xx') re: negative group number regex: bad group name 8. re.compile('(?P<foo_123>a)(?P=!)') re: bad character in backref group name '!' regex: bad group name 9. re.sub('(?P<a>x)', r'\g', 'xx') re: missing group name regex: missing < 10. re.compile('a\\') re.sub('x', '\\', 'x') re: bogus escape (end of line) regex: bad escape 11. re.compile(r'\1') re: bogus escape: '\1' regex: unknown group 12. re.compile('[a-') re: unexpected end of regular expression regex: bad set 13. re.sub(b'.', 'b', b'c') re: expected bytes, bytearray, or an object with the buffer interface, str found regex: expected bytes instance, str found 14. re.compile(r'\w', re.UNICODE | re.ASCII) re: ASCII and UNICODE flags are incompatible regex: ASCII, LOCALE and UNICODE flags are mutually incompatible 15. re.compile('(abc') re: unbalanced parenthesis regex: missing ) 16. re.compile('abc)') re: unbalanced parenthesis regex: trailing characters in pattern 17. re.compile(r'((.)\1+)') re: cannot refer to open group regex: can't refer to an open group Looks as in one case re messages are better, and in other cases regex messages are better. In any case it would be good to unify error messages in both modules. ---------- components: Library (Lib), Regular Expressions messages: 226575 nosy: ezio.melotti, mrabarnett, pitrou, serhiy.storchaka priority: normal severity: normal status: open title: Unify error messages of re and regex type: enhancement versions: Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue22364> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com