python模拟进程状态

from transitions import Machine
# 定义一个自己的类
class Matter(object):
    pass
model = Matter()
states = ['New', 'Ready', 'Waiting', 'Running','Terminated']
# The trigger argument defines the name of the new triggering method
transitions = [
    {'trigger': 'Admitted', 'source': 'New', 'dest': 'Ready'},
    {'trigger': 'Dispatch', 'source': 'Ready', 'dest': 'Running'},
    {'trigger': 'Input/Output or event wait', 'source': 'Running', 'dest': 'Waiting'},
    {'trigger': 'Input/Output or event completion', 'source': 'Waiting', 'dest': 'Ready'},
    {'trigger':'Exit','source':'Running','dest':'Terminated'},
    {'trigger':'Interrupt','source':'Running','dest':'Ready'}]
# 初始化
machine = Machine(model=model, states=states,transitions=transitions, initial='New')
# Test
print(model.state)
model.Admitted()
print(model.state)