FIRST_COMPLETED = concurrent.futures.FIRST_COMPLETED

FIRST_EXCEPTION = concurrent.futures.FIRST_EXCEPTION

ALL_COMPLETED = concurrent.futures.ALL_COMPLETED

import asyncio

import time

async def get_html(term):

    print("start get url")

    await asyncio.sleep(term)

    print("end get url")

if __name__ == '__main__':

    group1 = [get_html(i) for i in range(10)]

    loop = asyncio.get_event_loop()

    import concurrent.futures

    loop.run_until_complete(asyncio.wait(group1, return_when=concurrent.futures.FIRST_COMPLETED))

    print(1)

import asyncio

import time

async def get_html(url):

    print("start get url")

    await asyncio.sleep(2)

    print("end get url")

if __name__ == "__main__":

    start_time = time.time()

    loop = asyncio.get_event_loop()

    #gather和wait的区别

    #gather更加high-level

    group1 = [get_html("http://projectsedu.com") for i in range(2)] # 分组

    group2 = [get_html("http://www.imooc.com") for i in range(2)]

    group1 = asyncio.gather(*group1)

    group2 = asyncio.gather(*group2)

    group2.cancel()

    loop.run_until_complete(asyncio.gather(group1, group2, return_exceptions=True))

    print(time.time() - start_time)