title: Unknown variable for Python typehint
body: <p>I have a wrapper function, what should I put as the return value if the variable to be returned is unknown?</p>
  
  <pre><code>def try_catch_in_loop(func_to_call: callable, *args):
      for attempt in range(NUM_RETRYS + 1):
          try:
              if attempt &lt; NUM_RETRYS:
                  return func_to_call(*args)
              else:
                  raise RunTimeError("Err msg")
          except gspread.exceptions.APIError:
              request_limit_error()
  </code></pre>
  
  <p>Specifically looking what to put at the end of the function call ie:</p>
  
  <p><code>def try_catch_in_loop(...) -&gt; {What do I put here}:</code></p>