title: Inspect params and return types
body: <p>Is it possible using Python 3 syntax for declaring input parameters and return value types determine those types? Similarly to determining the number of parameters of a function?</p>
  
  <pre><code>def foo(name: str) -&gt; int:
      ....
  </code></pre>
  
  <p>I would like to get <code>str</code> and <code>int</code> respectively.</p>