What is the purpose of the `imagecodecs` package in `nnunetv2`'s requirements?

[joshuacwnewton]

Hi there! We are a downstream consumer of nnunetv2. We recently ran into issues with the imagecodecs package due to the maintainer deleting wheel files from PyPI, which broke frozen requirements:

• Could imagecodecs 2024.1.1 be 'un'yanked? cgohlke/imagecodecs#129

I was curious why imagecodecs was getting installed in the first place, and found that nnunetv2 has installed this package since the commit fee6fa2. But, there are no other code results, no imports, no usages.

So, what purpose does imagecodecs have for the nnunetv2 package? Is it necessary?

[VAIDEHI-28]

I've submitted a pull request to address this issue: #2992

The imagecodecs package was listed as a dependency in pyproject.toml but has no imports or references anywhere in the nnunetv2 codebase. I verified this by searching the entire repository for any usage of imagecodecs — zero results were found. I also confirmed that nnUNet installs and runs successfully without it.

Happy to make any changes if needed. Thank you!

[FabianIsensee]

As explained in #2992 , imagecodecs is needed for reading and writing compressed tif files. So it has to stay. As far as I can tell, the package is back to normal and there should be no more issues