python 协程 下一步执行 常用

@asyncio.coroutine yield from 协程

Asyncio Finite State Machine

import asyncio import time from random import randint

@asyncio.coroutine def StartState(): print("Start State called \n") input_value = randint(0, 1) time.sleep(1) if (input_value == 0): result = yield from State2(input_value) else: result = yield from State1(input_value) print("Resume of the Transition : \nStart State calling " + result)

@asyncio.coroutine def State1(transition_value): outputValue = str("State 1 with transition value = %s \n" % transition_value) input_value = randint(0, 1) time.sleep(1) print("...Evaluating...") if input_value == 0: result = yield from State3(input_value) else : result = yield from State2(input_value) result = "State 1 calling " + result return outputValue + str(result)

@asyncio.coroutine def State2(transition_value): outputValue = str("State 2 with transition value = %s \n" % transition_value) input_value = randint(0, 1) time.sleep(1) print("...Evaluating...") if (input_value == 0): result = yield from State1(input_value) else : result = yield from State3(input_value) result = "State 2 calling " + result return outputValue + str(result)

@asyncio.coroutine def State3(transition_value): outputValue = str("State 3 with transition value = %s \n" % transition_value) input_value = randint(0, 1) time.sleep(1) print("...Evaluating...") if (input_value == 0): result = yield from State1(input_value) else : result = yield from EndState(input_value) result = "State 3 calling " + result return outputValue + str(result)

@asyncio.coroutine def EndState(transition_value): outputValue = str("End State with transition value = %s \n" % transition_value) print("...Stop Computation...") return outputValue

if name == "main": print("Finite State Machine simulation with Asyncio Coroutine") loop = asyncio.get_event_loop() loop.run_until_complete(StartState())