Python模拟进程状态

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代码

    from transitions import Machine
    # 定义类
    class Matter(object):
        pass
    model = Matter()
    # 状态定义
    states=['New', 'Ready', 'Waiting', 'Running','Terminated']
    # 定义状态转移
    transitions = [
        {'trigger': 'Admitted', 'source': 'New', 'dest': 'Ready' },
        {'trigger': 'Dispatch', 'source': 'Ready', 'dest': 'Running'},
        {'trigger': 'Interrupt', 'source': 'Running', 'dest': 'Ready'},
        {'trigger': 'InputOutputoreventwait', 'source': 'Running', 'dest': 'Waiting'},
        {'trigger': 'InputOutputoreventcompletion', 'source': 'Waiting', 'dest': 'Ready'},
        {'trigger': 'Exit', 'source': 'Running', 'dest': 'Terminated'}]
    # 初始化
    machine = Machine(model=model, states=states, transitions=transitions, initial='New')
    # Test
    print(model.state) # New
    # 状态转变的完整流程
    model.Admitted()
    print(model.state)
    model.Dispatch()
    print(model.state)
    model.Interrupt()
    print(model.state)
    model.Dispatch()
    print(model.state)
    model.InputOutputoreventwait()
    print(model.state)
    model.InputOutputoreventcompletion()
    print(model.state)
    model.Dispatch()
    print(model.state)
    model.Exit()

运行

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