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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def handle_no_start_state(self):
 """Handles the situation, when no start state exists during execution The method waits, until a transition is created. It then checks again for an existing start state and waits again, if this is not the case. It returns the None state if the the state machine was stopped. """

        start_state = self.get_start_state(set_final_outcome=True)
        while not start_state:
            # depending on the execution mode pause execution
            execution_signal = state_machine_execution_engine.handle_execution_mode(self)
            if execution_signal is StateMachineExecutionStatus.STOPPED:
                # this will be caught at the end of the run method
                return None

            self._transitions_cv.acquire()
            self._transitions_cv.wait(3.0)
            self._transitions_cv.release()
            start_state = self.get_start_state(set_final_outcome=True)
        return start_state