python async await不能返回元组

时间:2018-12-18 13:57:14

标签: python async-await python-asyncio aiohttp

我想创建一个从网站异步下载的功能。我需要将下载结果与输入参数结合起来,以便可以在下载后同时使用结果和参数。

我目前有以下内容:

async def download(session, url, var1, var2):
    with async_timeout.timeout(10):
        async with session.get(url) as response:
            return await (response.read(), url, var1, var2)

async def loop_download(loop, urls, var1s, var2s):
    async with aiohttp.ClientSession(loop=loop) as session:
        tasks = [download(session, url, var1, var2) for url, var1, var2 in zip(urls, var1s, var2s)]
        results = await asyncio.gather(*tasks)
        return results

loop = asyncio.get_event_loop()
results = loop.run_until_complete(loop_download(loop, urls, var1s, var2s))

这将返回错误:

TypeError: object tuple can't be used in 'await' expression

如何将一些输入数据(例如url)加入结果,以便可以将其用于进一步分析?

1 个答案:

答案 0 :(得分:2)

通过以下方式解决:

return (await response.read(), url, x, y)