title: Function annotation with two or more return parameters
body: <p>When I write an annotation for a function which returns one parameter, I have no problems.</p>
  
  <pre><code>def func() -&gt; str:
      return "ok"
  </code></pre>
  
  <p>However, when I write an annotation with two or more parameters, my PyCharm gives me <code>SyntaxError: invalid syntax</code>.</p>
  
  <pre><code>def func() -&gt; str, str:
      return "ok - 1", "ok - 2"
  </code></pre>
  
  <p>I think that the parameters can be combined with a <code>tuple</code>, but I don't think that's the best way to do it.</p>
  
  <p>My question is: how can I properly annotate a function with two or more return parameters?</p>
  
  <p>Please include a PEP link, if any, in your response. I looked for the answer at <a href="https://www.python.org/dev/peps/pep-0484" rel="noreferrer">PEP 484</a> and <a href="https://www.python.org/dev/peps/pep-3107" rel="noreferrer">PEP 3107</a> and could not find it.</p>