title: Is combining argument descriptions and type hinting possible in Python 3?
body: <p>In Python 3 you can add descriptions to your function parameters:</p>
  
  <pre><code>def foo(host: 'ip address for connection')
      cool_stuff()
  </code></pre>
  
  <p>and you can also provide an expected type which can later be checked with <code>mypy</code>:</p>
  
  <pre><code>def foo(host: str)
      cool_stuff()
  </code></pre>
  
  <p>Both are very useful in my eyes - is there a way to combine both and still be able to let <code>mypy</code> check consistency? </p>