Avoid DeprecationWarnings when importing scipy.ndimage filter functions

[fbunt]

Fix #260

Import from scipy.ndimage rather than scipy.ndimage.filters as the filters namespace is now deprecated.

[GPUtester]

Can one of the admins verify this patch?

[jakirkham]

ok to test

[fbunt]

Hmm It looks like i missed some based on the test output

[fbunt]

Looks like I got all of the filters DeprecationWarnings. scipy.ndimage.fourier has the same issue though. Would you like me to do the same for that namespace? The fourier functions appear to have been importable from the scipy.ndimage namespace at least as far back as 0.19.1 as well.

[fbunt]

I don't think the docs build CI failure is due to my changes. It seems to happen regardless. I found these issues discussing it:

• Jinja 2 imports have been deprecated sphinx-doc/sphinx#10291
• [error occurred in build.] ImportError: cannot import name 'environmentfilter' from 'jinja2'  readthedocs/readthedocs.org#9038

[GenevieveBuckley]

Thank you for the PR @fbunt!

I agree, I think the docs build failure is unrelated. I suspect the environment_doc.yml file is very old, and we might need to update the version numbers in it.

[GenevieveBuckley]

Let's try the same fix suggested here

Pinning to Jinja2<3.1 fixed it for our project. At first I thought 3.0.3 broke it too until I saw something else undoing my pin in the log; you should check again.

The CI tests are running again now, so if they all pass this time we should be ready to merge this PR.

[fbunt]

Thanks!

[jakirkham]

Thank you both! 🙏