title: When I use `pip3 install --upgrade pip ` get error
body: <p>I want to upgrade the pip:</p>
  
  <pre><code>$ pip3 install --upgrade pip 
  </code></pre>
  
  <p>But I get the bellow error:</p>
  
  <pre><code>Could not fetch URL https://pypi.python.org/simple/pip/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:645) - skipping
  </code></pre>