Uvloop: 'coroutine' object is not iterable

[oleksandr-kuzmenko]

• uvloop version: 0.9.1
• Python version: 3.6
• Platform: Ubuntu Xenial

Version 0.9.1:
I got an error

 File "/app/app/<***>/utils.py", line 35, in <***>
    async with app['client_session'].get(url) as response:
  File "/usr/local/lib/python3.6/dist-packages/aiohttp/client.py", line 690, in __aenter__
    self._resp = yield from self._coro
  File "/usr/local/lib/python3.6/dist-packages/aiohttp/client.py", line 267, in _request
    conn = yield from self._connector.connect(req)
  File "/usr/local/lib/python3.6/dist-packages/aiohttp/connector.py", line 402, in connect
    proto = yield from self._create_connection(req)
  File "/usr/local/lib/python3.6/dist-packages/aiohttp/connector.py", line 748, in _create_connection
    _, proto = yield from self._create_direct_connection(req)
  File "/usr/local/lib/python3.6/dist-packages/aiohttp/connector.py", line 831, in _create_direct_connection
    req=req, client_error=client_error)
  File "/usr/local/lib/python3.6/dist-packages/aiohttp/connector.py", line 796, in _wrap_create_connection
    return (yield from self._loop.create_connection(*args, **kwargs))
TypeError: 'coroutine' object is not iterable

Version 0.8.1:
Not reproduced

The error does not depend on other libraries.

[Sherlock-Holo]

I forgot if I met this problem, but I guess the build script about uvloop
has some problems because I rewrite the Arch pkgbuild about uvloop and
fixed some problems like yours

Alex Kuzmenko [e-mail] 于 2017年12月6日周三 17:01写道：

>

• uvloop version: 0.9.1
• Python version: 3.6
• Platform: Ubuntu Xenial

Version 0.9.1:
I got an error

File "/app/app/<>/utils.py", line 35, in <>
async with app['client_session'].get(url) as response:
File "/usr/local/lib/python3.6/dist-packages/aiohttp/client.py", line 690, in __aenter__
self._resp = yield from self._coro
File "/usr/local/lib/python3.6/dist-packages/aiohttp/client.py", line 267, in _request
conn = yield from self._connector.connect(req)
File "/usr/local/lib/python3.6/dist-packages/aiohttp/connector.py", line 402, in connect
proto = yield from self._create_connection(req)
File "/usr/local/lib/python3.6/dist-packages/aiohttp/connector.py", line 748, in _create_connection
_, proto = yield from self._create_direct_connection(req)
File "/usr/local/lib/python3.6/dist-packages/aiohttp/connector.py", line 831, in _create_direct_connection
req=req, client_error=client_error)
File "/usr/local/lib/python3.6/dist-packages/aiohttp/connector.py", line 796, in _wrap_create_connection
return (yield from self._loop.create_connection(args, *kwargs))
TypeError: 'coroutine' object is not iterable

Version 0.8.1:
Not reproduced

The error does not depend on other libraries.

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[1st1]

Did you install uvloop via pip? Do you use any other packages that are compiled with Cython?

[oleksandr-kuzmenko]

yes, we use pip. and we have other packages (compiled with Cython) (for example: aiohttp, cChardet)

[oliwarner]

I get the same with Python 3.6 (stock cpython, Ubuntu 17.10) with a pip-installed uvloop

[achimnol]

Another bump here with Python 3.6 on Ubuntu as well.

[frnkvieira]

Same here. (Python 3.6.4, Ubuntu 17.10)

[Urahara]

I facing this problem too, using aiohttp, any workaround? Snippet of my code:

            try:
                async with async_timeout.timeout(15):
                    async with self.session.get('http://example.com') as resp:
                        response = resp
                        break
            except Exception as e:

[1st1]

I suspect that the bug is in Cython. Waiting for its next release to fix things.

[asvetlov]

Have observed the same problem in our production code.
Surprisingly plain aiohttp example (without our straightforward but complex tooling built on top of aiohttp session) worked fine.

I was unable to pin down the minimal reproducible test case unfortunately.

[dyeray]

I'm having the exact same issue on my project, in this case when creating an asyncio_redis connection. It only happens if I import BeautifulSoup at the module level (so it was already imported before calling loop.create_connection()). I'm importing it at the function level as a workaround.

[codeadict]

I have this issue too with aiohttp

[1st1]

Again, it looks like this is a regression in Cython. Try installing earlier uvloop versions, we'll fix it with the next Cython release.

[1st1]

A new @cython.iterable_coroutine decorator has been added to Cython, which should resolve this issue. Now waiting for the next release to happen.

[em1208]

I have the same issue using uvloop 0.9.1 in python 3.5.2 with asyncio create_subprocess_exec. I hope this will be fixed soon!

[woyodb]

uvloop version: 0.9.1
Python version: 3.6.4
Platform: Mac OS
I got the same issue, hope this to be fixed soon.

[achimnol]

Cython 0.28 and 0.28.1 which includes the required patch is released now. :tada:
Ref: The Cython 0.28.1 changelog
@1st1 I think it is the time to update uvloop! :wink:

[1st1]

Fixed in master. Please test :)

[snenkov]

I keep having this issue. I am using the latest cpython and uvloop. Any clues how I can fix this? : )

[1st1]

Not sure. Most likely it's unrelated to uvloop. I suggest debugging the line that causes this exception.