[issue33112] SequenceMatcher bug

2018-03-20 Thread Tim Peters
Tim Peters added the comment: Please see the response to issue31889. Short course: you need to pass `autojunk=False` to the SequenceMatcher constructor. -- nosy: +tim.peters resolution: -> duplicate stage: -> resolved status: open -> closed

[issue33112] SequenceMatcher bug

2018-03-20 Thread Martin
New submission from Martin : difflib.SequenceMatcher fails to make a proper alignment between 2 sequences with only 3 single letter changes. Its performance is completely off with a similarity ratio of 0.16, in stead of the more accurate 0.99. Here is a snippet to replicate the