Removing changes associated with Bugbear rule B019 #13715
Merged
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This PR reverts the change from lru_cache to cachedmethod. The primary goal of the original change was to avoid memory leaks, due to lru_cache holding instances of a class alive longer than they should be.
However, for our test framework, the workaround to avoid these memory leaks really aren't worth it.
I also added an lru_cache to cli_factory.getattr, improving its recurring lookup time substantially.
Finally, I corrected a type check that was erroneously converted in the initial pass.