Chris Rose offline at offby1.net
Sat Feb 15 18:25:58 CET 2014

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Right now, any alternative SequenceMatcher implementation in difflib
requires that the implementor also reimplement the diff formatting methods
(unified_diff and context_diff).

I propose something along these lines (patch to follow if the idea is
sound):

class Differ:
    def __init__(self, linejunk=None, charjunk=None,
sequence_matcher_factory=SequenceMatcher):
        # and so on

    def compare(self, a, b):
        cruncher = self.sequence_matcher_factory(self.linejunk, a, b)
        # and so on


The same general idea with unified_diff, ndiff, and context_diff

Basically, there are two obvious points of extension in difflib: The
formatting of the output opcodes, and the method used to find sequences.
The latter is not easily extended while reusing the former, and I'd like to
change that. Note that I'm asking because I'd like to do the work, not
because I want someone else to do it.

Is this a reasonable idea?

-- 
Chris R.
======
Not to be taken literally, internally, or seriously.
Twitter: http://twitter.com/offby1
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