[issue12325] regex matches incorrectly on literal dot (99.9% confirmed)
New submission from Cal Leeming cal.leem...@simplicitymedialtd.co.uk:
I believe I might have found a bug in the Python re libraries. Here is a
complete debug of what is happening (my apologies for the nature of the actual
text). I have ran this regex through RegexBuddy (and a few other tools), and
all of them do the correct action (which is to not do any replacement), apart
from Python. I haven't yet tried this in another language.
ORIGINAL TEXT
313229176
me and a buddy and his girlfriend were watching tv once and this blabbering
idiot starts talking about this scientific study she heard about where they
built a fake city and only one guy didn't know that it was a fake. we all
paused for a second and i said the truman show? and she says yeah! that was
the name of it! me my buddy and his girlfriend all catch eyes and are baffled
at how stupid she was
TEXT AFTER REGEX SUB
me and a buddy and his girlfriend were http://watching.tv once and this
blabbering idiot starts talking about this scientific study she heard about
where they built a fake city and only one guy didn't know that it was a fake.we
all paused for a second and i said the truman show? and she says yeah! that
was the name of it! me my buddy and his girlfriend all catch eyes and are
baffled at how stupid she was
---
--- REPLACED TEXT ---
watching tv
http://watching.tv
---
REGEX
_t = re.compile(r(^|
)((?:[\w\-]{2,}?\.|)(?:[\w\-]{2,}?)(?:\.com|\.net|\.org|\.co\.uk|\.tv|\.ly)),
flags = re.IGNORECASE | re.MULTILINE | re.DEBUG)
COMMAND
_t.sub(\\1http://\\2;, original_message_here)
REGEX DEBUG
subpattern 1
branch
at at_beginning
or
literal 32
subpattern 2
subpattern None
branch
min_repeat 2 65535
in
category category_word
literal 45
literal 46
or
subpattern None
min_repeat 2 65535
in
category category_word
literal 45
subpattern None
literal 46
branch
literal 99
literal 111
literal 109
or
literal 110
literal 101
literal 116
or
literal 111
literal 114
literal 103
or
literal 99
literal 111
literal 46
literal 117
literal 107
or
literal 116
literal 118
or
literal 108
literal 121
--
components: Regular Expressions
messages: 138234
nosy: Cal.Leeming
priority: normal
severity: normal
status: open
title: regex matches incorrectly on literal dot (99.9% confirmed)
versions: Python 2.7
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[issue12325] regex matches incorrectly on literal dot (99.9% confirmed)
Changes by Cal Leeming cal.leem...@simplicitymedialtd.co.uk: -- type: - behavior ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12325 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12325] regex matches incorrectly on literal dot (99.9% confirmed)
Cal Leeming cal.leem...@simplicitymedialtd.co.uk added the comment: Take particular notice to the following: \.co\.uk or literal 99 literal 111 literal 46 literal 117 literal 107 map(lambda x: chr(x), [99,111,46,117,107]) ['c', 'o', '.', 'u', 'k'] It would appear it is ignoring the first \. But why?? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12325 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12325] regex matches incorrectly on literal dot (99.9% confirmed)
Robert Lehmann lehman...@gmail.com added the comment:
I can not reproduce either of your findings. Could you provide us with your
version information? re version 2.2.1, _sre 2.2.2, Python 2.6.6, Debian sid
here. Also tested with Python 2.7.2rc1 (same RE).
import re
re.compile(r\.co\.uk, re.DEBUG)
literal 46
literal 99
literal 111
literal 46
literal 117
literal 107
_sre.SRE_Pattern object at 0xb73b0860
re.compile(r(^|
)((?:[\w\-]{2,}?\.|)(?:[\w\-]{2,}?)(?:\.com|\.net|\.org|\.co\.uk|\.tv|\.ly)),
flags = re.IGNORECASE | re.MULTILINE | re.DEBUG).sub(\\1http://\\2;,
me and a buddy and his girlfriend were watching tv once and this
blabbering idiot starts talking about this scientific study she heard about
where they built a fake city and only one guy didn't know that it was a
fake. we all paused for a second and i said the truman show? and she says
yeah! that was the name of it! me my buddy and his girlfriend all catch
eyes and are baffled at how stupid she was)
subpattern 1
...
'me and a buddy and his girlfriend were watching tv once...'
--
nosy: +lehmannro
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[issue12325] regex matches incorrectly on literal dot (99.9% confirmed)
Cal Leeming cal.leem...@simplicitymedialtd.co.uk added the comment: Oh jeez, you're going to think I'm such an idiot. I just ran a completely fresh test in the cli (away from the original source), and the issue disappeared (it was caused by caching - apparently). I'm really sorry to have bothered you guys, I should have thought and tested this outside the original code first. I'll make sure to do this before posting any bugs in the future. Thank you for your extremely fast response though! Cal -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12325 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12325] regex matches incorrectly on literal dot (99.9% confirmed)
Changes by R. David Murray rdmur...@bitdance.com: -- resolution: - invalid stage: - committed/rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12325 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
