behavior of partial_token_set_ratio

[pagpires]

According to the algorithm, currently partial_token_set_ratio will return 100 for string a, b as long as they have a shared token, right? Is this behavior expected?

[polm]

I ran into this, it can cause two strings that only have the word "the" in common to get an 86 point match using WRatio / process.extract. This is not very useful...

[NightMachinery]

In [6]: fuzz.partial_token_sort_ratio("physics 2 vid", "study physics physics 2")
   ...: fuzz.partial_token_sort_ratio("physics 2 vid", "study physics physics 2 video")
   ...: fuzz.partial_token_set_ratio("physics 2 vid", "study physics physics 2")
   ...: fuzz.partial_token_set_ratio("physics 2 vid", "study physics physics 2 video")
   ...: fuzz.token_set_ratio("physics 2 vid", "study physics physics 2")
   ...: fuzz.token_set_ratio("physics 2 vid", "study physics physics 2 video")
   ...: fuzz.partial_ratio("physics 2 vid", "study physics physics 2")
   ...: fuzz.partial_ratio("physics 2 vid", "study physics physics 2 video")
Out[6]: 77
Out[6]: 77
Out[6]: 100
Out[6]: 100
Out[6]: 82
Out[6]: 82
Out[6]: 69
Out[6]: 100

This behavior seems broken to me, as only partial_ratio sees "study physics physics 2 video" as the better alternative.