- 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: TODO
- Repo: `http://github.com/halfak/Deltas`_
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.sequence_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, apply
>>>
>>> a_tokens = ["This", " ", "comes", " ", "first", ".",
... " ",
... "This", " ", "comes", " ", "second", "."]
>>>
>>> b_tokens = ["This", " ", "comes", " ", "second", ".",
... " ",
... "This", " ", "comes", " ", "first", "."]
>>>
>>> operations = segment_matcher.diff(a_tokens, b_tokens)
>>>
>>> for operation in operations:
... print(operation)
...
Equal(name='equal', a1=7, a2=13, b1=0, b2=6)
Insert(name='insert', a1=6, a2=7, b1=6, b2=7)
Equal(name='equal', a1=0, a2=6, b1=7, b2=13)
Delete(name='delete', a1=6, a2=7, b1=13, b2=13) |
|---|