Specify Pillow as requirement in setup.py? about optimize-images

[vascowhite]

I just realised that you intend Pillow to be used. I installed into a virtualenv using Pipenv and got an error that PIL wasn't installed, so I raised this issue.
Do you think it would be better to put a requirement for pillow in setup.py? You already have piexif there, so I don't understand why Pillow isn't.

[victordomingos]

I guess the current setup.py may be improved. I have two separate requirements files, one for desktop and another for iOS/Pythonista. In Pythonista, you already have Pillow, and the bundled version cannot be upgraded, so it’s not included as a requirement for iOS.

I will see if I can improve setup.py to make it a bit more clear and implement a more straightforward installation process.

[vascowhite]

I guess I wasn't thinking of the iOS part, it makes sense why you've done it that way now.
I think I was confused by the error message refering to PIL rather than Pillow. If I had installed globally rather than into a virtualenv I wouldn't have seen any error as I have Pillow installed.

[victordomingos]

I have just added some details to the setup.py file. If all works as it should, doing a pip install should select and install the correct Pillow version if it’s not running on iOS.