6676 port generative inferers

[marksgraham]

Part of #6676 .

Description

Adds Inferers to assist with training and sampling from diffusion models and controllers.

Also takes the opportunity to make two changes which slipped through the previous PRs:

• rename the num_channels arg in the spade diffusion unet to channels to be consistent with all the other models added from Generative - this slipped through in the networks PR.
• add the Ordering class to __init__.py for easier import

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[KumoLiu]

Thanks for the PR.
Looks like we introduce one inferer for one model, can we refactor them such as make DiffusionInferer more general if comes into other model. Perhaps accept pre-process or post-process or same thing others.

[KumoLiu]

@ericspod, could you please also help review this PR?
Thanks!

[KumoLiu]

/build

[KumoLiu]

Hi @marksgraham, could you please check-pick the commit here after it merged which caused a CI error and could not merge?
Thanks.

[KumoLiu]

/build

[marksgraham]

Hi @marksgraham, could you please check-pick the commit here after it merged which caused a CI error and could not merge? Thanks.

Hi,
There is a test in test_ordering that sometimes fails as it has random behaviour. I don't think the test is useful and should be removed. Shall I remove it on this branch before we merge?

[KumoLiu]

I think the error is caused by the update from flake8-bugbear instead of test_ordering. But anyway it is also not related to the PR, you could pin the version to avoid the error first, I will try to create a PR to fix it in the dev branch.
https://github.com/Project-MONAI/MONAI/actions/runs/7544331654/job/20537411217#step:2:2601

[KumoLiu]

/build

[KumoLiu]

Hi @marksgraham, now the error seems related to the test_ordering.py. As it is random, can we add set_determinism to ensure the test passes?
Something like:

MONAI/tests/test_rand_cucim_dict_transform.py

Line 26 in 25f1901

set_determinism(seed=0)

MONAI/monai/utils/misc.py

Line 318 in 25f1901

def set_determinism(

[marksgraham]

hi @KumoLiu

I have removed the test. As far as I can tell, the test does not make sense and does not seem to be usefully testing any part of the ordering code.

[KumoLiu]

/build