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aio-libs / aiohttp

Asynchronous HTTP client/server framework for asyncio and Python
https://docs.aiohttp.org
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TypeError: 'ABCMeta' aiohttp==3.6.0, Python 3.6.9 #4053

Closed yuval-lb closed 5 years ago

yuval-lb commented 5 years ago

Long story short

Cant import aiohttp

pip freeze gives: aiohttp==3.6.0 python3 version: Python 3.6.9

import aiohttp Traceback (most recent call last): File "", line 1, in File "/usr/local/lib/python3.6/site-packages/aiohttp/init.py", line 6, in from .client import BaseConnector as BaseConnector File "/usr/local/lib/python3.6/site-packages/aiohttp/client.py", line 63, in from .client_reqrep import ClientRequest as ClientRequest File "/usr/local/lib/python3.6/site-packages/aiohttp/client_reqrep.py", line 29, in from . import hdrs, helpers, http, multipart, payload File "/usr/local/lib/python3.6/site-packages/aiohttp/multipart.py", line 703, in class MultipartWriter(Payload): File "/usr/local/lib/python3.6/site-packages/aiohttp/multipart.py", line 786, in MultipartWriter headers: Optional[MultiMapping[str]]=None TypeError: 'ABCMeta' object is not subscriptable

Any known restriction, what I am missing?

tehKost commented 5 years ago

How did you solved it?

aesmaeili commented 5 years ago

I got the same issue. Any idea about how to solve it? python 3.7 aiohttp 3.6.0

webknjaz commented 5 years ago

Anyone has a reproducer? Also, what is the method for aiohttp installation that you use?

aesmaeili commented 5 years ago

For my case, aiohttp was installed as a dependency of another python module named spade. I used pip to install it. The list of all pip packages are as follows:

aiohttp 3.6.0 aiohttp-jinja2 1.1.2 aioopenssl 0.4.1 aiosasl 0.4.0 aioxmpp 0.10.5 arrow 0.15.1 asn1crypto 0.24.0 async-timeout 3.0.1 attrs 19.1.0 Babel 2.7.0 certifi 2019.6.16 cffi 1.12.3 chardet 3.0.4 cryptography 2.7 dnspython 1.16.0 idna 2.8 Jinja2 2.10.1 jinja2-time 0.2.0 lxml 4.4.1 MarkupSafe 1.1.1 multidict 4.4.0 pip 19.2.2 pyasn1 0.4.7 pyasn1-modules 0.2.6 pycparser 2.19 pyOpenSSL 19.0.0 python-dateutil 2.8.0 pytz 2019.2 setuptools 41.0.1 singletonify 0.2.3 six 1.12.0 sortedcollections 1.1.2 sortedcontainers 2.1.0 spade 3.1.3 timeago 1.0.8 tzlocal 1.5.1 wheel 0.33.4 yarl 1.3.0

asvetlov commented 5 years ago

Try pip install -U multidict. multidict>=4.5 is required.