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                from itertools import cycle  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                from curio import sleep  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                from bricknil import attach, start  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                from bricknil.hub import DuploTrainHub  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                from bricknil.sensor import DuploTrainMotor, DuploSpeedSensor, LED, DuploVisionSensor, DuploSpeaker  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                from bricknil.const import Color  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                import logging  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                @attach(DuploSpeaker, name='speaker')  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                @attach(DuploVisionSensor, name='vision_sensor', capabilities=['sense_color', 'sense_ctag', 'sense_reflectivity'])  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                @attach(LED, name='led')  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                @attach(DuploSpeedSensor, name='speed_sensor', capabilities=['sense_speed', 'sense_count'])  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                @attach(DuploTrainMotor, name='motor')  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Train(DuploTrainHub):  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    async def speed_sensor_change(self):  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        speed = self.speed_sensor.value[DuploSpeedSensor.capability.sense_speed]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        count = self.speed_sensor.value[DuploSpeedSensor.capability.sense_count]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        self.message_info(f'Speed sensor changed speed: {speed} count: {count}') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    async def vision_sensor_change(self):  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        cap = DuploVisionSensor.capability  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        color = self.vision_sensor.value[cap.sense_color]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ctag  = self.vision_sensor.value[cap.sense_ctag]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        reflt  = self.vision_sensor.value[cap.sense_reflectivity]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        self.message_info(f'Vision sensor changed color: {color} ctag: {ctag} reflt: {reflt}') | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    async def run(self):  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        self.message_info("Running") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        colors = cycle([Color.red, Color.purple, Color.yellow, Color.blue, Color.white])  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        snd = DuploSpeaker.sounds  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        sounds = cycle([snd.brake, snd.station, snd.water, snd.horn, snd.steam])  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        for i in range(5):  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            await self.led.set_color(next(colors))       # Cycle through the colors  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            await self.speaker.play_sound(next(sounds))  # cycle through the sounds  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            tgt_speed = 20 + i*15                        # Keep increasing the speed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            await self.motor.ramp_speed(tgt_speed, 2000)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            self.message_info(f"Set speed to {i}") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            await sleep(3)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        self.message_info("Done") | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                async def system():  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    hub = Train('train') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                if __name__ == '__main__':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    logging.basicConfig(level=logging.INFO)  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    start(system)  | 
            
            
                                                        
            
                                    
            
            
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