Python模拟进程状态

Python模拟进程状态

博客内容

参考http://www.cnblogs.com/21207-iHome/p/6085334.html模拟附件中的进程状态图

准备工作

先在cmd中下载transitions
pip install transitions

完整代码

from transitions import Machine
class Progress(object):
    pass
model = Progress()
states = ['New', 'Ready', 'Waiting', 'Running', 'Terminated']
transitions=[
    {'trigger': 'Admitted', 'source': 'New', 'dest': 'Ready'},
    {'trigger': 'Input', 'source': 'Waiting', 'dest': 'Ready'},
    {'trigger': 'Output', 'source': 'Waiting', 'dest': 'Ready'},
    {'trigger': 'event_completion', 'source': 'Waiting', 'dest': 'Ready'},
    {'trigger': 'event_wait', 'source': 'Running', 'dest': 'Waiting'},
    {'trigger': 'Input', 'source': 'Running', 'dest': 'Waiting'},
    {'trigger': 'Output', 'source': 'Running', 'dest': 'Waiting'},
    {'trigger': 'Interrupt', 'source': 'Running', 'dest': 'Ready'},
    {'trigger': 'Dispatch', 'source': 'Ready', 'dest': 'Running'},
    {'trigger': 'Exit', 'source': 'Running', 'dest': 'Terminated'}]

machine=Machine(model=model,states=states,transitions=transitions,initial='New')

print(model.state)
model.Admitted()
print(model.state)
model.Dispatch()
print(model.state)
model.event_wait()
print(model.state)
model.Output()
print(model.state)
model.Dispatch()
print(model.state)
model.Exit()
print(model.state)

运行截图