Discord.py: Broken aiohttp version in rewrite

Created on 11 May 2018 · 4Comments · Source: Rapptz/discord.py

I think that the aiohttp dependency version is broken in rewrite.

The following Dockerfile produces the following traceback when the container is run (src/app.py simply import discord):

FROM python:3.6-alpine3.7

RUN wget 'https://github.com/Rapptz/discord.py/archive/rewrite.tar.gz' -O /tmp/discord.py.tar.gz

RUN pip install /tmp/discord.py.tar.gz

#RUN pip install --upgrade aiohttp

COPY src src

CMD python /src/app.py

Traceback (most recent call last):
  File "/src/app.py", line 1, in <module>
    import discord
  File "/usr/local/lib/python3.6/site-packages/discord/__init__.py", line 20, in <module>
    from .client import Client, AppInfo
  File "/usr/local/lib/python3.6/site-packages/discord/client.py", line 30, in <module>
    from .guild import Guild
  File "/usr/local/lib/python3.6/site-packages/discord/guild.py", line 39, in <module>
    from .channel import *
  File "/usr/local/lib/python3.6/site-packages/discord/channel.py", line 31, in <module>
    from .webhook import Webhook
  File "/usr/local/lib/python3.6/site-packages/discord/webhook.py", line 27, in <module>
    import aiohttp
  File "/usr/local/lib/python3.6/site-packages/aiohttp/__init__.py", line 6, in <module>
    from .client import *  # noqa
  File "/usr/local/lib/python3.6/site-packages/aiohttp/client.py", line 15, in <module>
    from . import connector as connector_mod
  File "/usr/local/lib/python3.6/site-packages/aiohttp/connector.py", line 17, in <module>
    from .client_proto import ResponseHandler
  File "/usr/local/lib/python3.6/site-packages/aiohttp/client_proto.py", line 6, in <module>
    from .http import HttpResponseParser, StreamWriter
  File "/usr/local/lib/python3.6/site-packages/aiohttp/http.py", line 8, in <module>
    from .http_parser import (HttpParser, HttpRequestParser, HttpResponseParser,
  File "/usr/local/lib/python3.6/site-packages/aiohttp/http_parser.py", line 15, in <module>
    from .http_writer import HttpVersion, HttpVersion10
  File "/usr/local/lib/python3.6/site-packages/aiohttp/http_writer.py", line 304, in <module>
    class URL(yarl.URL):
  File "/usr/local/lib/python3.6/site-packages/yarl/__init__.py", line 232, in __init_subclass__
    "is forbidden".format(cls))
TypeError: Inheritance a class <class 'aiohttp.http_writer.URL'> from URL is forbidden

Upgrading aiohttp after the install to the most recent version resolves the issue, but the build warns that discord-py 1.0.0a0 has requirement aiohttp<2.3.0,>=2.0.0, but you'll have aiohttp 3.2.1 which is incompatible.

Source

Khoyo

Most helpful comment

Getting this error?

TypeError: Inheritance a class <class 'aiohttp.http_writer.URL'> from URL is forbidden

This is due to yarl 1.2 having a breaking change that breaks aiohttp. Downgrade your yarl using pip install -U "yarl<1.2"

fourjr on 11 May 2018

👍6

All 4 comments

Getting this error?

TypeError: Inheritance a class <class 'aiohttp.http_writer.URL'> from URL is forbidden

This is due to yarl 1.2 having a breaking change that breaks aiohttp. Downgrade your yarl using pip install -U "yarl<1.2"

fourjr on 11 May 2018

👍6

In relation to fourjr's answer above, it may be necessary to downgrade even further pip install "yarl<1" otherwise you'll encounter a different error.

Reference: https://github.com/aio-libs/aiohttp/issues/2662