Requirements:

• pillow
• sqlalchemy
• bottle

Before installing pillow (PIL):

Make sure you have libjpeg-dev that provides for JPEG decoding:

sudo apt install libjpeg-dev # or yum install libjpeg-devel or whatever
sudo pip3 install pillow

If you still don't have the JPEG decoder:

sudo pip3 install -I --no-cache-dir pillow