python-txaio fails to build with Python 3.11.0a2.

=================================== FAILURES ===================================
______________________ test_as_future_coroutine[asyncio] _______________________

framework = <module 'txaio.aio' from '/builddir/build/BUILDROOT/python-txaio-21.2.1-3.fc36.x86_64/usr/lib/python3.11/site-packages/txaio/aio.py'>

    def test_as_future_coroutine(framework):
        '''
        call a coroutine (asyncio)
        '''
        pytest.importorskip('asyncio')
        # can import asyncio on python3.4, but might still be using
        # twisted
        if not txaio.using_asyncio:
            return
    
        errors = []
        results = []
        calls = []
    
>       from asyncio import coroutine
    
        @coroutine
E       ImportError: cannot import name 'coroutine' from 'asyncio' (/usr/lib64/python3.11/asyncio/__init__.py)

test/test_as_future.py:105: ImportError
___________________ test_explicit_reactor_coroutine[asyncio] ___________________

framework = <module 'txaio.aio' from '/builddir/build/BUILDROOT/python-txaio-21.2.1-3.fc36.x86_64/usr/lib/python3.11/site-packages/txaio/aio.py'>

    def test_explicit_reactor_coroutine(framework):
        """
        If we set an event-loop, Futures + Tasks should use it.
        """
        pytest.importorskip('asyncio')
        if txaio.using_twisted:
            pytest.skip()
    
>       from asyncio import coroutine
    
        @coroutine
E       ImportError: cannot import name 'coroutine' from 'asyncio' (/usr/lib64/python3.11/asyncio/__init__.py)

test/test_call_later.py:174: ImportError
___________________________ test_is_future_coroutine ___________________________

framework_aio = <module 'txaio.aio' from '/builddir/build/BUILDROOT/python-txaio-21.2.1-3.fc36.x86_64/usr/lib/python3.11/site-packages/txaio/aio.py'>

    def test_is_future_coroutine(framework_aio):
        '''
        Returning an immediate value from as_future
        '''
        pytest.importorskip('asyncio')  # 'aio' might be using trollius
>       from asyncio import coroutine
    
        @coroutine
E       ImportError: cannot import name 'coroutine' from 'asyncio' (/usr/lib64/python3.11/asyncio/__init__.py)

test/test_is_future.py:45: ImportError
=============================== warnings summary ===============================
test/test_as_future.py: 4 warnings
test/test_callback.py: 3 warnings
test/test_cancel.py: 1 warning
test/test_create.py: 2 warnings
test/test_errback.py: 7 warnings
test/test_gather.py: 4 warnings
test/test_is_future.py: 2 warnings
  /builddir/build/BUILDROOT/python-txaio-21.2.1-3.fc36.x86_64/usr/lib/python3.11/site-packages/txaio/aio.py:323: DeprecationWarning: There is no current event loop
    return asyncio.get_event_loop()

test/test_as_future.py: 4 warnings
test/test_call_later.py: 3 warnings
test/test_callback.py: 3 warnings
test/test_cancel.py: 2 warnings
test/test_errback.py: 7 warnings
  /builddir/build/BUILD/txaio-21.2.1/test/util.py:52: DeprecationWarning: There is no current event loop
    return _run_once(txaio.config.loop or asyncio.get_event_loop())

test/test_gather.py::test_gather_two[asyncio]
test/test_gather.py::test_gather_two[asyncio]
test/test_gather.py::test_gather_two[asyncio]
test/test_gather.py::test_gather_no_consume[asyncio]
test/test_gather.py::test_gather_no_consume[asyncio]
test/test_gather.py::test_gather_no_consume[asyncio]
  /builddir/build/BUILD/txaio-21.2.1/test/util.py:85: DeprecationWarning: There is no current event loop
    asyncio.get_event_loop().run_until_complete(future)

-- Docs: https://docs.pytest.org/en/stable/warnings.html
=========================== short test summary info ============================
FAILED test/test_as_future.py::test_as_future_coroutine[asyncio] - ImportErro...
FAILED test/test_call_later.py::test_explicit_reactor_coroutine[asyncio] - Im...
FAILED test/test_is_future.py::test_is_future_coroutine - ImportError: cannot...
============ 3 failed, 47 passed, 67 skipped, 48 warnings in 0.32s =============

The @asyncio.coroutine decorator enabling legacy generator-based coroutines to be compatible with async/await code. The function has been deprecated since Python 3.8 and the removal was initially scheduled for Python 3.10. Use async def instead. (Contributed by Illia Volochii in bpo-43216.)

https://bugs.python.org/issue43216
https://docs.python.org/3.11/whatsnew/3.11.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.11/fedora-rawhide-x86_64/02988865-python-txaio/

For all our attempts to build python-txaio with Python 3.11, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/package/python-txaio/

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 3.11:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/

Let us know here if you have any questions.

Python 3.11 is planned to be included in Fedora 37. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.11.
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.