PIL version check for enum change appears to break SIMD versions

🐛 Describe the bug

This change appears to break current Pillow-SIMD version #5898

    if tuple(int(part) for part in PIL.__version__.split(".")) >= (9, 1):
  File "/home/.../lib/python3.10/site-packages/torchvision/transforms/_pil_constants.py", line 7, in <genexpr>
    if tuple(int(part) for part in PIL.__version__.split(".")) >= (9, 1):
ValueError: invalid literal for int() with base 10: 'post1'

Amusingly enough, I warned against this approach in a users PR in timm https://github.com/rwightman/pytorch-image-models/pull/1256

Would be nice to have it fixed before 1.12 is finalized, I just hit this trying out the RC

Versions

PT 1.12 RC, TV 0.13.0

[rwightman]

@datumbox no strong reason, hasattr works, I think in this case there wouldn’t be any dir gotchas as it’s a enum in a module, hasattr does have stronger guarantees re attrib resolution in all cases though

[datumbox]

@rwightman Thanks for reporting. Is there any specific reason you propose checking in dir() instead of doing hasattr(Image, "Resampling")?

@vfdev-5 Thanks for the ultra fast fix. I left this comment on the PR. I’ve tested with SIMD, PIL 9.0 and 9.1 and it works. Let me know what you think, thanks!