Python3.6 AttributeError：模块“asyncio”没有“run”属性
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Python3.6 AttributeError: module 'asyncio' has no attribute 'run'
提问by Jirka Svítil
I tried to read https://hackernoon.com/asynchronous-python-45df84b82434. It's about asynchronous python and I tried the code from this, but I'm getting a weird Error. The code is: `
我试图阅读https://hackernoon.com/asynchronous-python-45df84b82434。这是关于异步 python 的，我尝试了这个代码，但我收到了一个奇怪的错误。代码是：`
import asyncio
import aiohttp
urls = ['http://www.google.com', 'http://www.yandex.ru', 'http://www.python.org']
async def call_url(url):
print('Starting {}'.format(url))
response = await aiohttp.ClientSession().get(url)
data = await response.text()
print('{}: {} bytes: {}'.format(url, len(data), data))
return data
futures = [call_url(url) for url in urls]
asyncio.run(asyncio.wait(futures))
When I try to run it says:
当我尝试运行时，它说：
Traceback (most recent call last):
File "test.py", line 15, in <module>
asyncio.run(asyncio.wait(futures))
AttributeError: module 'asyncio' has no attribute 'run'
sys:1: RuntimeWarning: coroutine 'call_url' was never awaited
I dont have any files named ayncio and I have proof:
我没有任何名为 ayncio 的文件，我有证据：
>>> asyncio
<module 'asyncio' from '/usr/lib/python3.6/asyncio/__init__.py'>
回答by Norrius
asyncio.runis a Python 3.7 addition. In 3.5-3.6, your example is roughly equivalent to:
asyncio.run是 Python 3.7 的补充。在 3.5-3.6 中，您的示例大致相当于：
import asyncio
futures = [...]
loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.wait(futures))
回答by Martijn Pieters
The asyncio.run()function was added in Python 3.7. From the asyncio.run()function documentation:
该asyncio.run()函数是在 Python 3.7 中添加的。从asyncio.run()功能文档：
New in version 3.7: Important: this function has been added to asyncio in Python 3.7 on a provisional basis.
3.7 版新功能：重要提示：此函数已临时添加到 Python 3.7 中的 asyncio。
Note the provisionalpart; the Python maintainers forsee that the function may need further tweaking and updating, so the API may change in future Python versions.
注意临时部分；Python 维护者预见到该函数可能需要进一步调整和更新，因此 API 可能会在未来的 Python 版本中发生变化。
At any rate, you can't use it on Python 3.6. You'll have to upgrade or implement your own.
无论如何，你不能在 Python 3.6 上使用它。您必须升级或实施自己的。
A very simple approximation would be to use loop.run_until_complete():
一个非常简单的近似是使用loop.run_until_complete()：
loop = asyncio.get_event_loop()
result = loop.run_until_complete(coro)
although this ignores handling remaining tasks that may still be running. See the asyncio.runnerssource codefor the complete asyncio.run()implementation.
尽管这忽略了处理可能仍在运行的剩余任务。查看完整实现的asyncio.runners源代码asyncio.run()。
