code: def wait(self, timeout=None):
          
          if threadable.isInIOThread():
              raise RuntimeError(
                  "EventualResult.wait() must not be run in the reactor thread.")
  
          if imp.lock_held():
              try:
                  imp.release_lock()
              except RuntimeError:
                  # The lock is held by some other thread. We should be safe
                  # to continue.
                  pass
              else:
                  # If EventualResult.wait() is run during module import, if the
                  # Twisted code that is being run also imports something the
                  # result will be a deadlock. Even if that is not an issue it
                  # would prevent importing in other threads until the call
                  # returns.
                  raise RuntimeError(
                      "EventualResult.wait() must not be run at module "
                      "import time.")
  
          result = self._result(timeout)
          if isinstance(result, Failure):
              result.raiseException()
          return result
docs: Return the result, or throw the exception if result is a failure.
  
          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 or raised on one call, additional calls will return/raise the
          same result.