All this is demotivating. I'm getting this (for python 3.6):
I type "pip3 install pillow" and get:
Collecting pillow Could not fetch URL https://pypi.python.org/simple/pillow/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749) - skipping Could not find a version that satisfies the requirement pillow (from versions: ) No matching distribution found for pillow