Problem Confirming the SSL Certificate - OSX

  Could not fetch URL https://pypi.python.org/simple/tensorflow-hub/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:720) - skipping

  Could not find a version that satisfies the requirement tensorflow-hub (from versions: )

No matching distribution found for tensorflow-hub

在安装tensorflow-hub的时候报上面证书的问题，解决办法：

Upgrade pip using.

curl https://bootstrap.pypa.io/get-pip.py | python3