def add_transition(self, condition, next_state):
        ''' Adds a new transition to the state.  The "condition" param must contain a callable
            object.  When the "condition" evaluates to True, the "next_state" param is set as
            the active state. '''
        # Enforce transition validity
        assert(callable(condition))
        assert(hasattr(next_state, "enter"))
        assert(callable(next_state.enter))
        assert(hasattr(next_state, "do_work"))
        assert(callable(next_state.do_work))
        assert(hasattr(next_state, "exit"))
        assert(callable(next_state.exit))
        
        # Add transition
        if not hasattr(self, "transitions"):
            self.transitions = []
        self.transitions.append((condition, next_state))
 Adds a new transition to the state.  The "condition" param must contain a callable
            object.  When the "condition" evaluates to True, the "next_state" param is set as
            the active state. 
recipes/Python/578656_State_Machine_Framework_AI/recipe-578656.py