PIL missing during installation

[Lupin76]

I tried to install pyradar in my laptop with ubuntu 19.04 with

pip install pyradar --user

but I get this error

Could not find a version that satisfies the requirement PIL (from pyradar) (from versions: )
No matching distribution found for PIL (from pyradar)

I tried also installing Pillow

pip install Pillow --user

but it say

Requirement already satisfied: pillow in /usr/lib/python2.7/dist-packages (5.4.1)

Any suggestions?