'move one step westwards'

def func(self):

    caller = self.caller
    bridge_step = max((-1), (caller.db.tutorial_bridge_position - 1))
    if (bridge_step < 0):
        wexit = search_object(self.obj.db.west_exit)
        if wexit:
            caller.move_to(wexit[0])
        else:
            caller.msg('No    west    exit    was    found    for    this    room.    Contact    an    admin.')
        return
    caller.db.tutorial_bridge_position = bridge_step
    caller.location.msg_contents(('%s    steps    westwards    across    the    bridge.' % caller.name), exclude=caller)
    caller.execute_cmd('look')
