difflib.SequenceMatcher.set_seq2¶

SequenceMatcher.set_seq2(b)[source]¶

Set the second sequence to be compared.

The first sequence to be compared is not changed.

>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.set_seq2("abcd")
>>> s.ratio()
1.0
>>>

SequenceMatcher computes and caches detailed information about the second sequence, so if you want to compare one sequence S against many sequences, use .set_seq2(S) once and call .set_seq1(x) repeatedly for each of the other sequences.