code: def _result(self, timeout=None):
          
          if timeout is None:
              warnings.warn(
                  "Unlimited timeouts are deprecated.",
                  DeprecationWarning,
                  stacklevel=3)
              # Queue.get(None) won't get interrupted by Ctrl-C...
              timeout = 2**31
          self._result_set.wait(timeout)
          # In Python 2.6 we can't rely on the return result of wait(), so we
          # have to check manually:
          if not self._result_set.is_set():
              raise TimeoutError()
          self._result_retrieved = True
          return self._value
docs: Return the result, if available.
  
          It may take an unknown amount of time to return the result, so a
          timeout option is provided. If the given number of seconds pass with
          no result, a TimeoutError will be thrown.
  
          If a previous call timed out, additional calls to this function will
          still wait for a result and return it if available. If a result was
          returned on one call, additional calls will return/raise the same
          result.