python模拟进程状态

任务详情

参考http://www.cnblogs.com/21207-iHome/p/6085334.html模拟附件中的进程状态图，提交代码运行截图、

实现python模拟进程

1.引入外部变量
from transitions import Machine
2.定义一个我自己的属性
class xqc(object)
3.创建对象及定义

states = ['New', 'Ready', 'Waiting', 'Running', 'Terminated'

4.定义状态转移

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'}]

5.初始化

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

6.完整过程、

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)

7.完整代码‘

#引入外部变量
from transitions import Machine

#定义一个我总自己的属性
class xqc(object):
    pass

#创建我自己的一个对象
model = xqc()
#对于状态的些定义
states = ['New', 'Ready', 'Waiting', 'Running', 'Terminated']
#定义状态转移
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'}]
# 初始化
machine = Machine(model=model, states=states,
                  transitions=transitions, initial='New')
#状态转变的完整过程
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)

截图