Minor type/doc fixes

[akx]

This PR fixes a couple of small typing/docs related things that popped up while running PyCharm's Find Problems on the repo.

[akx]

cc @stevhliu: mind double-checking that args change (since you apparently added the docs in #1075) – by my reasoning, args can't be a dict since those classes are (occasionally) accessing it with self.args.foo?

[github-actions]

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[stevhliu]

Hmm, I'm actually not entirely sure about this one 😅 . Here it looks like it is a dict:

https://github.com/TimDettmers/bitsandbytes/blob/b03ce0e0be74888e3a604ec749b761621a6c8407/bitsandbytes/optim/optimizer.py#L407

[akx]

Hmm, I'm actually not entirely sure about this one 😅 . Here it looks like it is a dict:

You're pointing at what gets passed into MockArgs just below: https://github.com/TimDettmers/bitsandbytes/blob/b03ce0e0be74888e3a604ec749b761621a6c8407/bitsandbytes/optim/optimizer.py#L417

MockArgs itself is a knockoff types.SimpleNamespace that just assigns dict values into itself as attrs:

https://github.com/TimDettmers/bitsandbytes/blob/b03ce0e0be74888e3a604ec749b761621a6c8407/bitsandbytes/optim/optimizer.py#L14-L17

[stevhliu]

Ah ok, wasn't aware of types.SimpleNamespace. In that case, it looks good to me. Thanks for fixing the types! 🤗

[Titus-von-Koeller]

Thanks @akx, good catches! And thanks @stevhliu for reviewing. LGTM