Python difflib.Differ with Contextual difference

Question

How can I get contextual difference (e.i only the lines with difference and not all lines) along with comparing the characters within a Line using difflib.Differ()

Example

>>> text1 = '''  1. 111
...   2. 222
...   3. 333
...   4. 444
... '''.splitlines(1)
>>> text2 = '''  1. 121 xxx
...   2. 222
...   3. 313
...   4. 444
... '''.splitlines(1)
>>> from difflib import Differ
>>> d = Differ()
>>> 
>>> print ''.join(d.compare(text1, text2))
-   1. 111
+   1. 121 xxx
    2. 222
-   3. 333
?       ^
+   3. 313
?       ^
    4. 444

>>> 


# I want something like this with context=True
>>> print ''.join(d.compare(text1, text2))
-   1. 111
+   1. 121 xxx
-   3. 333
?       ^
+   3. 313
?       ^

UPDATE: I have answered it here: python difflib character diff with unifed contextual format

falsetru · Accepted Answer · 2014-07-11 04:25:08Z

3

Obviously you can filter the results, removing lines that start with whitespace. A list comprehension and str.startswith can do that.

>>> from difflib import Differ
>>> d = Differ()
>>> print ''.join(line for line in d.compare(text1, text2) if not line.startswith(' '))
-   1. 111
+   1. 121 xxx
-   3. 333
?       ^
+   3. 313
?       ^

edited Jul 11, 2014 at 4:25

falsetru

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answered Jul 11, 2014 at 4:20

Oleh Prypin

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