An open licensed (MIT) library for performing generating deltas (A.K.A sequences of operations) representing the difference between two sequences of comparable tokens.
- Installation:
pip install deltas - Repo: http://github.com/halfak/Deltas
- Documentation: http://pythonhosted.org/deltas
- Note this library requires Python 3.3 or newer
This library is intended to be used to make experimental difference detection strategies more easily available. There are currently two strategies available:
deltas.sequence_matcher.diff(a, b):- A shameless wrapper around difflib.SequenceMatcher to get it to work within the structure of deltas.
deltas.segment_matcher.diff(a, b, segmenter=None):- A generalized difference detector that is designed to detect block moves
and copies based on the use of a
Segmenter.
| Example: | >>> from deltas import segment_matcher, text_split
>>>
>>> a = text_split.tokenize("This is some text. This is some other text.")
>>> b = text_split.tokenize("This is some other text. This is some text.")
>>> operations = segment_matcher.diff(a, b)
>>>
>>> for op in operations:
... print(op.name, repr(''.join(a[op.a1:op.a2])),
... repr(''.join(b[op.b1:op.b2])))
...
equal 'This is some other text.' 'This is some other text.'
insert ' ' ' '
equal 'This is some text.' 'This is some text.'
delete ' ' '' |
|---|