Async/Await入门指南:https://zhuanlan.zhihu.com/p/27258289
import asyncio import random class Potato: @classmethod def make(cls, num, *args, **kws): potatos = [] for i in range(num): potatos.append(cls.__new__(cls, *args, **kws)) print('potatos:', potatos) return potatos all_potatos = Potato.make(5) async def ask_for_potato(): await asyncio.sleep(random.random()) all_potatos.extend(Potato.make(random.randint(1, 10))) async def take_potatos(num): count = 0 while True: if len(all_potatos) == 0: await ask_for_potato() potato = all_potatos.pop() yield potato count += 1 if count == num: break async def buy_potatos(): bucket = [] async for p in take_potatos(50): bucket.append(p) print(f'Got potato {id(p)}...') class tomato: @classmethod def make(cls, num, *args, **kws): tomatos = [] for i in range(num): tomatos.append(cls.__new__(cls, *args, **kws)) print('potatos:', tomatos) return tomatos all_tomatos = tomato.make(5) async def ask_for_tomatos(): await asyncio.sleep(random.random()) all_tomatos.extend(Potato.make(random.randint(1, 10))) async def take_tomatos(num): count = 0 while True: if len(all_tomatos) == 0: await ask_for_tomatos() tomatos = all_tomatos.pop() yield tomatos count += 1 if count == num: break async def buy_tomatos(): bucket = [] async for p in take_tomatos(50): bucket.append(p) print(f'Got tomatos {id(p)}...') def main(): import asyncio loop = asyncio.get_event_loop() res = loop.run_until_complete(asyncio.wait([buy_potatos(), buy_tomatos()])) loop.close() main()