Error installing prettytable on ubuntu with pip

Question

I just installed pip, installed a few packages np. I tried this

pip install prettytable
Collecting prettytable
From cffi callback 

        

Answer 1

The error comes from PyOpenSSL. Either your OpenSSL is too old or too new. Try upgrading or downgrading OpenSSL and PyOpenSSL.

Answer 2

Reinstalling pyopenssl worked for me:

pip uninstall pyopenssl
pip install pyopenssl