Adding partial to the functools category

[Clement-Lelievre]

Overview

As the title suggests... adding partial to the functools category

Proposal

I checked the available errors falling under the functools category in version 1.9.1 and found exactly one item ('use cache').
I think adding partial would be a good addition, both for code legibility and -in some cases at least- performance.

Note: this is one of many items I can think of. If this is useful I could suggest more enhancements.

[dosisod]

Thank you for suggesting this! I don't use partial very often, but it would be good to add a check for it.