I just want to let you know that this change broke my code (written a long time ago) because I was using the profile_fromstring (maybe this is considered a private method?) to create a profile from the 'icc_profile' info of the image. I understand that using the profile_frombytes is the right thing to do, because the 'icc_profile' is already in bytes, no problem there, but I would like to know if this method is considered private and, if it's the case, what's the proper way to create a profile from the 'icc_profile' info? If the method is not considered private, maybe you should have put a deprecation before removing it. Thanks

Sorry about that, how were you calling it?

Pillow's C API is internal and private, and can and will change between versions without deprecation warnings.

Thanks for the fast reply! As it's private, no need to be sorry, this is just normal.

I was calling it like this:

profile_data = img.info.get('icc_profile')
if profile_data:
    profile = ImageCms.core.profile_fromstring(profile_data)

I'm still calling profile_frombytes the same way. Is there a way to get a profile from the image info 'icc_profile' without using private methods? After reflexion, I should probably do this:

profile_data = img.info.get('icc_profile')
if profile_data:
    profile_file = io.BytesIO(profile_data)
    profile = ImageCms.getOpenProfile(profile_file)

After reflexion, I should probably do this:

profile_data = img.info.get('icc_profile')
if profile_data:
    profile_file = io.BytesIO(profile_data)
    profile = ImageCms.getOpenProfile(profile_file)

Sounds like a plan to me. Although for the record, to better match your first code block, you'd want to do ImageCms.getOpenProfile(profile_file).profile.

Thanks for the info, but as I'm using profile with ImageCms.getProfileName and ImageCms.profileToProfile, I think it's better that I keep it as a ImageCmsProfile instance.