python模拟进程状态

 代码运行如上图

参考老师给出的链接

源代码为

from transitions import Machine

# 定义一个自己的类

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

# 状体转变

model.Admitted()

print(model.state) # Ready

model.Dispatch()

print(model.state) # Running

model.InputOutputoreventwait()

print(model.state) # Waiting

model.InputOutputoreventcompletion()

print(model.state) # Ready

model.Dispatch()

print(model.state) # Running

model.Interrupt()

print(model.state) # Ready

model.Dispatch()

print(model.state) # Running

model.Exit()

print(model.state) # Terminated