45 lines
1.2 KiB
Python
45 lines
1.2 KiB
Python
import cmd
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import threading
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from queue import Empty, Queue
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from equipment.turtle_device import TurtleDevice
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class TurtleDeviceThread(threading.Thread):
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# TODO(Homework 4)
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def __init__(self):
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super().__init__()
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self.device = TurtleDevice()
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self.queue = Queue()
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def run(self):
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while True:
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try:
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item = self.queue.get()
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except self.queue.Empty:
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continue
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else:
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if (item == 'exit'):
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break
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self.device.execute(item[0], item[1:])
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self.queue.task_done()
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class NoBlockingTurtleShell(cmd.Cmd):
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intro = 'Welcome to the turtle shell. Type help or ? to list commands.\n'
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prompt = '(turtle) '
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file = None
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def __init__(self, turtle_thread: TurtleDeviceThread):
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super(NoBlockingTurtleShell, self).__init__()
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self.turtle_thread = TurtleDeviceThread()
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def do_execute(self, arg):
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self.turtle_thread.queue.put(arg)
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def do_exit(self, arg):
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self.turtle_thread.queue.put('exit')
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if __name__ == '__main__':
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turtle_thread = TurtleDeviceThread()
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turtle_thread.start()
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NoBlockingTurtleShell(turtle_thread).cmdloop() |