title: use correct version of 'pip' installed for your Python interpreter
body: <p>I am using pycharm , i am having this error by adding any package , <a href="http://prntscr.com/k90z2q" rel="nofollow noreferrer">Click Here</a></p>
  
  <p>i have tried lot of methods , but didn't succeed yet. </p>
  
  <p>Info : </p>
  
  <ol>
  <li>python 3.6.2</li>
  <li>pip 10.0.1</li>
  <li>VirtualEnv</li>
  </ol>