Hello, zeep 2.5 with asynchronous transport fails with aiohttp >= 3.0.0 as aiohttp.Timeout has been deprecated (see https://github.com/aio-libs/aiohttp/issues/2348). According to the ticket, zeep might need to use async_timeout.timeout context manager instead of relying on the deprecated aiohttp.Timeout.
Quick workaround while it is not fixed:
import aiohttp
import async_timeout
aiohttp.Timeout = async_timeout.timeout
from zeep import Client as ZeepClient
Fixed in #735 i think
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Quick workaround while it is not fixed: