Running docker exec on python3.12 fails

[matan1008]

I run the following code:

exec_ = await container.exec(command)
async with exec_.start(detach=False) as stream:
    print(await stream.read_out())

• Expected behaviour:
  On Python 3.11 and before, the code prints the command output

• Actual behaviour:
  On Python 3.12, the start function raises:

aiodocker.exceptions.DockerError: DockerError(500, "Cannot upgrade connection to vendored tcp protocol, the docker server has closed underlying socket. Status code: 101. Headers: <CIMultiDictProxy('Content-Type': 'application/vnd.docker.multiplexed-stream', 'Connection': 'Upgrade', 'Upgrade': 'tcp', 'Api-Version': '1.43', 'Docker-Experimental': 'false', 'Ostype': 'linux', 'Server': 'Docker/24.0.7 (linux)')>.")

How to reproduce

I tried it on several docker images, including the standard mysql build

Your environment

Ubuntu 22.04
Python 3.12
aiodocker version: 0.21.0
Docker version 24.0.7, build afdd53b

[matan1008]

The issue is solved in version 3.9.1 of aiohttp