title: Python PIP unsatisifed requirement cookielib3pp
body: <p>I'd like to install cookielib for Python 3.5. However, I'm getting an unclear error message:</p>
  
  <pre><code>Tom@osx:~/mycode$ pip3 search cookielib
  cookielib3     - 
  Tom@osx:~/mycode$ pip3 install cookielib3
  Collecting cookielib3
    Could not find a version that satisfies the requirement cookielib3 (from versions: )
  No matching distribution found for cookielib3
  </code></pre>
  
  <p>What is going on here?</p>