code: def wait_for_mode(self, mode, timeout=None):
          '''Set the flight mode.
  
          If wait is True, wait for the mode to change before returning.
          If timeout is nonzero, raise a TimeoutError if the flight mode
          hasn't changed after timeout seconds.
          '''
  
          if not isinstance(mode, VehicleMode):
              mode = VehicleMode(mode)
  
          self.mode = mode
  
          self.wait_for(lambda: self.mode.name == mode.name,
                        timeout=timeout,
                        errmsg='failed to set flight mode'f wait_for_mode(self, mode, timeout=None):
          '''Set the flight mode.
  
          If wait is True, wait for the mode to change before returning.
          If timeout is nonzero, raise a TimeoutError if the flight mode
          hasn't changed after timeout seconds.
          '''
  
          if not isinstance(mode, VehicleMode):
              mode = VehicleMode(mode)
  
          self.mode = mode
  
          self.wait_for(lambda: self.mode.name == mode.name,
                        timeout=timeout,
                        errmsg='failed to set flight mode')
docs: Set the flight mode.
  
          If wait is True, wait for the mode to change before returning.
          If timeout is nonzero, raise a TimeoutError if the flight mode
          hasn't changed after timeout seconds.