python模拟进程状态

 1 from transitions import Machine
 2 # 定义一个自己的类
 3 class Matter(object):
 4     pass
 5 model = Matter()
 6 states = ['New', 'Ready', 'Waiting', 'Running','Terminated']
 7 # The trigger argument defines the name of the new triggering method
 8 transitions = [
 9     {'trigger': 'Admitted', 'source': 'New', 'dest': 'Ready'},
10     {'trigger': 'Dispatch', 'source': 'Ready', 'dest': 'Running'},
11     {'trigger': 'Input/Output or event wait', 'source': 'Running', 'dest': 'Waiting'},
12     {'trigger': 'Input/Output or event completion', 'source': 'Waiting', 'dest': 'Ready'},
13     {'trigger':'Exit','source':'Running','dest':'Terminated'},
14     {'trigger':'Interrupt','source':'Running','dest':'Ready'}]
15 # 初始化
16 machine = Machine(model=model, states=states,transitions=transitions, initial='New')
17 # Test
18 print(model.state)
19 model.Admitted()
20 print(model.state)
第二种