New submission from MaxR: When I compile and match, for example: pattern = re.compile(r""" ([a-z]|\d)+$ # ends with letter or number only """, re.VERBOSE | re.IGNORECASE) print(re.match(pattern, 'abc'))
result is correct: <_sre.SRE_Match object; span=(0, 3), match='abc'> but then I use the same pattern with another string: print(re.match(pattern, 'abc.fds')) result is: None I tried to reformulate the pattern to the same, for example: pattern = re.compile(r""" (a|b|c|d|e|f|g|h|i|j|k|l|m|n|o|p|q|r|s|t|u|v|w|x|y|z|\d)+$ # ends with letter or number only """, re.VERBOSE | re.IGNORECASE) or to: pattern = re.compile(r""" [a-z\d]+$ # ends with letter or number only """, re.VERBOSE | re.IGNORECASE) or to: pattern = = re.compile(r""" ([a-z]|\d)+$ # ends with letter or number only """, re.VERBOSE | re.IGNORECASE) but the result is all the time the same - None And еhat is the double strange for the last three pattern - None is result also for print(re.match(pattern, 'abc')) I checked this patterns on the site regex101.com and all of them should work good and right It's achtung! ---------- components: Regular Expressions messages: 286464 nosy: MaxR, ezio.melotti, mrabarnett priority: normal severity: normal status: open title: regex mismatch in the simple cases type: behavior versions: Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29388> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
