pip-system-certs This package patches pip and requests at runtime to use certificates from the default system store (rather than the bundled certs ca). This will allow pip to verify tls/ssl connections to servers who's cert is trusted by your system install. Simply install with: pip install...
but it could be the triggering of an error in some code involving ssl and cryptography.x509 that I was tinkering with. (checking remaining days before expiry of remote certs)