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Created on 2015-04-28 19:25 by Stephen.Evans, last changed 2022-04-11 14:58 by admin. This issue is now closed.
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| File name | Uploaded | Description | Edit | |
| refail.py | Stephen.Evans, 2015-04-28 19:25 | re.MULTILINE failure example | ||
| Messages (4) | |||
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| msg242205 - (view) | Author: Stephen Evans (Stephen.Evans) | Date: 2015-04-28 19:25 | |
A simple multiline regex fails when just the re.MULTILINE argument is used, but works when equivalent alternative methods are used. This was tested on Python2.7.8 on FreeBSD and Win32 Python2.7.9 data = re.sub(r'#.*', '', text, re.MULTILINE) # fails data = re.sub(r'(?m)#.*', '', text) # Ok data = re.sub(r'#.*', '', text, re.MULTILINE|re.DEBUG) # Ok All the expressions work correctly with Win64 Python3.4.3 The attached file has the code and with a sample of text that fails. |
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| msg242206 - (view) | Author: Matthew Barnett (mrabarnett) *  |
Date: 2015-04-28 19:38 | |
The 4th argument of re.sub is the maximum count (0 means unlimited).
>>> help(re.sub)
Help on function sub in module re:
sub(pattern, repl, string, count=0, flags=0)
Return the string obtained by replacing the leftmost
non-overlapping occurrences of the pattern in string by the
replacement repl. repl can be either a string or a callable;
if a string, backslash escapes in it are processed. If it is
a callable, it's passed the match object and must return
a replacement string to be used.
The value of re.MULTILINE is 8:
>>> re.MULTILINE
8
therefore it'll perform a maximum of 8 substitutions.
In summary: not a bug.
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| msg242363 - (view) | Author: R. David Murray (r.david.murray) *  |
Date: 2015-05-02 01:20 | |
It is, however, frequently reported as a bug, if that makes you feel any better :) |
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| msg257140 - (view) | Author: Ezio Melotti (ezio.melotti) * |
Date: 2015-12-28 22:21 | |
See #11957. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:16 | admin | set | github: 68259 |
| 2015-12-28 22:21:48 | ezio.melotti | set | messages: + msg257140 |
| 2015-05-02 01:20:27 | r.david.murray | set | nosy:
+ r.david.murray messages: + msg242363 |
| 2015-04-28 20:04:13 | serhiy.storchaka | set | status: open -> closed resolution: not a bug stage: resolved |
| 2015-04-28 19:38:44 | mrabarnett | set | messages: + msg242206 |
| 2015-04-28 19:25:28 | Stephen.Evans | create | |