自学教程：Python获取协程返回值的四种方式详解

import asynciofrom functools import partialasync def talk(name):    print(f"talk function run.")    await asyncio.sleep(0.1)    return f"{name} talk!"async def sleep(name):    print(f"sleep function run.")    await asyncio.sleep(0.1)    return f"{name} sleep!"def callback(name):    print(f"主动抛出接收：{name}")if __name__ == "__main__":    # 通过ensure_future获取，本质是future对象中的result方法    # loop = asyncio.get_event_loop()    # get_future1 = asyncio.ensure_future(talk("Dog"))    # get_future2 = asyncio.ensure_future(sleep("Cat"))    # loop.run_until_complete(get_future1)    # loop.run_until_complete(get_future2)    # print(get_future1.result())    # print(get_future2.result())    # 使用loop自带的create_task， 获取返回值    # loop = asyncio.get_event_loop()    # task1 = loop.create_task(talk("Dog"))    # task2 = loop.create_task(sleep("Cat"))    # loop.run_until_complete(task1)    # loop.run_until_complete(task2)    # print(task1.result())    # print(task2.result())    # 使用callback, 一旦await地方的内容运行完，就会运行callback    # loop = asyncio.get_event_loop()    # task1 = loop.create_task(talk("Dog"))    # task2 = loop.create_task(sleep("Cat"))    # task1.add_done_callback(callback)    # task2.add_done_callback(callback)    # loop.run_until_complete(task1)    # loop.run_until_complete(task2)    # print(task1.result())    # print(task2.result())    # 使用partial这个模块向callback函数中传入值    loop = asyncio.get_event_loop()    task1 = loop.create_task(talk("Dog"))    task2 = loop.create_task(talk("Cat"))    task1.add_done_callback(partial(callback))    task2.add_done_callback(partial(callback))    loop.run_until_complete(task1)    loop.run_until_complete(task2)    print(task1.result())    print(task2.result())