python-zeep fails to build with Python 3.10.0a2.

__________________________________ test_post ___________________________________

event_loop = <_UnixSelectorEventLoop running=False closed=False debug=False>

    @pytest.mark.requests
    @pytest.mark.asyncio
    async def test_post(event_loop):
        cache = stub(get=lambda url: None, add=lambda url, content: None)
        transport = asyncio.AsyncTransport(loop=event_loop, cache=cache)
    
        envelope = etree.Element("Envelope")
    
        with aioresponses() as m:
            m.post("http://tests.python-zeep.org/test.xml", body="x")
>           result = await transport.post_xml(
                "http://tests.python-zeep.org/test.xml", envelope=envelope, headers={}
            )

tests/test_asyncio_transport.py:61: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
src/zeep/asyncio/transport.py:107: in post_xml
    response = await self.post(address, message, headers)
src/zeep/asyncio/transport.py:90: in post
    response = await self.session.post(
/usr/lib64/python3.10/unittest/mock.py:2165: in _execute_mock_call
    result = await effect(*args, **kwargs)
/usr/lib/python3.10/site-packages/aioresponses/core.py:388: in _request_mock
    response = await self.match(method, url, **kwargs)
/usr/lib/python3.10/site-packages/aioresponses/core.py:334: in match
    response_or_exc = await matcher.build_response(
/usr/lib/python3.10/site-packages/aioresponses/core.py:190: in build_response
    resp = self._build_response(
/usr/lib/python3.10/site-packages/aioresponses/core.py:171: in _build_response
    resp.content = stream_reader_factory(loop)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

loop = <Mock id='140329107758576'>

    def stream_reader_factory(
            loop: 'Optional[asyncio.AbstractEventLoop]' = None
    ):
        protocol = ResponseHandler(loop=loop)
>       return StreamReader(protocol, loop=loop)
E       TypeError: StreamReader.__init__() missing 1 required positional argument: 'limit'

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.10/fedora-rawhide-x86_64/01787124-python-zeep/

For all our attempts to build python-zeep with Python 3.10, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/package/python-zeep/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.10:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.