WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.

Error cause: Install packages on debian jessie with pip python 3.8. 
Fix: Install with pip python 3.6 and run "python3.6 -m pip install <package>".


Install python 3.6: https://www.rosehosting.com/blog/how-to-install-python-3-6-4-on-debian-9/


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