Raise the exception when LoadImage has a reader specified but it is not installed

[ibro45]

Describe the bug
Running LoadImage(reader="ITKReader") without itk installed will just warn that itk is not installed and will proceed with using PILReader instead.

MONAI/monai/transforms/io/array.py

Line 185 in 33afaef

f"required package for reader {r} is not installed, or the version doesn't match requirement."

Expected behavior
If the specified reader is not installed, an exception should be raised.

[Bhavay-2001]

Hi @KumoLiu, I would like to work on this issue instead. Can you please guide me through this?

Is this issue still open? I have a draft request with code that should address the issue, looking for feedback

[KumoLiu]

Hi @girishsenthil,, free feel to create a PR, here is the contribution guide.
https://github.com/Project-MONAI/MONAI/blob/dev/CONTRIBUTING.md
Thanks.

https://github.com/girishsenthil/MONAI/pull/1#issue-2167268023
Let me know if there is anything I can change/improve, looking forward to your feedback @KumoLiu

Also - Not sure why commits from the main repo are being reflected in my branch, the file I changed is MONAI/monai/transforms/io/array.py

[KumoLiu]

Hi @girishsenthil, Thanks for all the hard work you've put in! I would like to recommend that you submit a PR in this repository, rather than your own. Please follow these steps:
https://github.com/Project-MONAI/MONAI/blob/dev/CONTRIBUTING.md#submitting-pull-requests

Thanks!