python-throttler fails to build with Python 3.14.0a2.

_______ TestThrottlerSimultaneous.test_via_service_simultaneous[100-500] _______
[gw1] linux -- Python 3.14.0 /usr/bin/python3

self = <tests.test_throttler_simultaneous.TestThrottlerSimultaneous object at 0x7f01ee6b7a80>
max_simultaneous = 100, count = 500

    @pytest.mark.parametrize(
        ('max_simultaneous', 'count'), ((1, 10), (3, 10), (100, 500))
    )
    def test_via_service_simultaneous(self, max_simultaneous: int, count: int):
        s = ServiceSimultaneous(max_simultaneous)
    
        @throttle_simultaneous(max_simultaneous)
        async def request(value: float):
            return await s.get(value)
    
>       main = asyncio.gather(*[request(v) for v in range(count)])

tests/test_throttler_simultaneous.py:20: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/lib64/python3.14/asyncio/tasks.py:869: in gather
    fut = ensure_future(arg, loop=loop)
/usr/lib64/python3.14/asyncio/tasks.py:731: in ensure_future
    loop = events.get_event_loop()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <asyncio.unix_events._UnixDefaultEventLoopPolicy object at 0x7f01ee719550>

    def get_event_loop(self):
        """Get the event loop for the current context.
    
        Returns an instance of EventLoop or raises an exception.
        """
        if self._local._loop is None:
>           raise RuntimeError('There is no current event loop in thread %r.'
                               % threading.current_thread().name)
E           RuntimeError: There is no current event loop in thread 'MainThread'.

/usr/lib64/python3.14/asyncio/events.py:681: RuntimeError
=========================== short test summary info ============================
FAILED tests/test_service.py::TestService::test_service[100-1.5] - RuntimeErr...
FAILED tests/test_service.py::TestService::test_service_simultaneous[1] - Run...
FAILED tests/test_service.py::TestService::test_service_simultaneous[3] - Run...
FAILED tests/test_service.py::TestService::test_service_simultaneous[100] - R...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-0.5-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-0.5-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-0.5-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-1.0-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-1.0-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-1.0-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-1.5-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-1.5-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1-1.5-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-0.5-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-0.5-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-0.5-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-1.0-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-1.0-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-1.0-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-1.5-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-1.5-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[3-1.5-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-0.5-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-0.5-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-0.5-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-1.0-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-1.0-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-1.0-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-1.5-3] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-1.5-5] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[5-1.5-7] - Ru...
FAILED tests/test_throttler.py::TestThrottler::test_via_service[100-0.5-10]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[100-0.5-1000]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[100-1.0-10]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[100-1.0-1000]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[100-1.5-10]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[100-1.5-1000]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1000-0.5-10]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1000-0.5-1000]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1000-1.0-10]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1000-1.0-1000]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1000-1.5-10]
FAILED tests/test_throttler.py::TestThrottler::test_via_service[1000-1.5-1000]
FAILED tests/test_throttler_simultaneous.py::TestThrottlerSimultaneous::test_via_service_simultaneous[1-10]
FAILED tests/test_throttler_simultaneous.py::TestThrottlerSimultaneous::test_via_service_simultaneous[3-10]
FAILED tests/test_throttler_simultaneous.py::TestThrottlerSimultaneous::test_via_service_simultaneous[100-500]
======================== 46 failed, 34 passed in 42.82s ========================

According to https://docs.python.org/dev/whatsnew/3.14.html#id3

Removed implicit creation of event loop by asyncio.get_event_loop(). It now raises a RuntimeError if there is no current event loop. (Contributed by Kumar Aditya in gh-126353.)

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08292984-python-throttler/

For all our attempts to build python-throttler with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/python-throttler/

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 3.14:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/

Let us know here if you have any questions.

Python 3.14 is planned to be included in Fedora 43.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14.
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.