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Created on 2011-03-22 10:09 by Brice.Videau, last changed 2022-04-11 14:57 by admin.
| Files | ||||
|---|---|---|---|---|
| File name | Uploaded | Description | Edit | |
| diff.tgz | Brice.Videau, 2011-03-22 10:09 | |||
| test.zip | mal, 2013-04-29 07:25 | |||
| 450.zip | folder4ben, 2013-09-20 09:01 | |||
| Messages (5) | |||
|---|---|---|---|
| msg131735 - (view) | Author: Brice Videau (Brice.Videau) | Date: 2011-03-22 10:09 | |
unified_diff seems to lose the context when comparing the 2 files contained in the attached archive using this script :
import difflib
b1 = open("out1.short","r").read().splitlines(True)
b2 = open("out2.short","r").read().splitlines(True)
compare = difflib.unified_diff(b1,b2)
for line in compare:
print line,
a big chunk of lines is considered as removed, just to be added next (around line 16).
Comparing out2.short against out1.short does not produce this behavior :
compare = difflib.unified_diff(b2,b1)
is "correct".
Other diff tools such as diff or vimdiff do not exhibit this problem.
|
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| msg132368 - (view) | Author: Terry J. Reedy (terry.reedy) *  |
Date: 2011-03-27 21:56 | |
2.6 only gets security fixes now. |
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| msg188043 - (view) | Author: Miguel Latorre (mal) | Date: 2013-04-29 07:25 | |
This bug is still present in python 2.7.4 and python 3.3.1. I attach another example, the result differs depending on number of lines to process (see test.py). |
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| msg198134 - (view) | Author: Benoît D Vages (folder4ben) | Date: 2013-09-20 09:01 | |
An other exemple if necessary (python 2.6 / 2.7) Got same behavior than mal using his script and my files. Seems to occur when the chunk of lines between 2 differences is repeated many times in the file |
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| msg278892 - (view) | Author: Steve Newcomb (steve.newcomb) * | Date: 2016-10-18 15:23 | |
Context reporting is still buggy in Python 3.5.2: >>> [ x for x in difflib.unified_diff( "'on'\n", "'on'\n\n\n")] ['--- \n', '+++ \n', '@@ -3,3 +3,5 @@\n', ' n', " '", ' \n', '+\n', '+\n'] >>> import sys >>> sys.version '3.5.2 (default, Sep 10 2016, 08:21:44) \n[GCC 5.4.0 20160609]' >>> (compiled under Ubuntu 16.04.1 LTS) |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:15 | admin | set | github: 55841 |
| 2016-10-18 15:23:47 | steve.newcomb | set | nosy:
+ steve.newcomb messages: + msg278892 |
| 2013-09-20 09:01:11 | folder4ben | set | files:
+ 450.zip nosy: + folder4ben messages: + msg198134 |
| 2013-04-29 21:30:24 | terry.reedy | set | versions: + Python 3.4, - Python 3.1 |
| 2013-04-29 07:25:07 | mal | set | files:
+ test.zip versions: + Python 2.7, Python 3.3 nosy: + mal messages: + msg188043 |
| 2011-03-27 21:56:15 | terry.reedy | set | nosy:
+ terry.reedy messages: + msg132368 versions: - Python 2.6 |
| 2011-03-22 10:09:29 | Brice.Videau | create | |