Anyio

- Added async support for temporary file handling
(`344 <https://github.com/agronholm/anyio/issues/873>`_; PR by 11kkw)
- Added 4 new fixtures for the AnyIO ``pytest`` plugin:

* ``free_tcp_port_factory``: session scoped fixture returning a callable that
generates unused TCP port numbers
* ``free_udp_port_factory``: session scoped fixture returning a callable that
generates unused UDP port numbers
* ``free_tcp_port``: function scoped fixture that invokes the
``free_tcp_port_factory`` fixture to generate a free TCP port number
* ``free_udp_port``: function scoped fixture that invokes the
``free_udp_port_factory`` fixture to generate a free UDP port number
- Added ``stdin`` argument to ``anyio.run_process()`` akin to what
``anyio.open_process()``, ``asyncio.create_subprocess_…()``, ``trio.run_process()``,
and ``subprocess.run()`` already accept (PR by jmehnle)
- Added the ``info`` property to ``anyio.Path`` on Python 3.14
- Changed ``anyio.getaddrinfo()`` to ignore (invalid) IPv6 name resolution results when
IPv6 support is disabled in Python
- Changed ``EndOfStream`` raised from ``MemoryObjectReceiveStream.receive()`` to leave
out the ``AttributeError`` from the exception chain which was merely an implementation
detail and caused some confusion
- Fixed traceback formatting growing quadratically with level of ``TaskGroup``
nesting on asyncio due to exception chaining when raising ``ExceptionGroups``
in ``TaskGroup.__aexit__``
(`863 <https://github.com/agronholm/anyio/issues/863>`_; PR by tapetersen)
- Fixed ``anyio.Path.iterdir()`` making a blocking call in Python 3.13
(`873 <https://github.com/agronholm/anyio/issues/873>`_; PR by cbornet and
agronholm)
- Fixed ``connect_tcp()`` producing cyclic references in tracebacks when raising
exceptions (`809 <https://github.com/agronholm/anyio/pull/809>`_; PR by graingert)
- Fixed ``anyio.to_thread.run_sync()`` needlessly holding on to references of the
context, function, arguments and others until the next work item on asyncio
(PR by Wankupi)

- Added **experimental** support for running functions in subinterpreters on Python
3.13 and later
- Added support for the ``copy()``, ``copy_into()``, ``move()`` and ``move_into()``
methods in ``anyio.Path``, available in Python 3.14
- Changed ``TaskGroup`` on asyncio to always spawn tasks non-eagerly, even if using a
task factory created via ``asyncio.create_eager_task_factory()``, to preserve expected
Trio-like task scheduling semantics (PR by agronholm and graingert)
- Configure ``SO_RCVBUF``, ``SO_SNDBUF`` and ``TCP_NODELAY`` on the selector
thread waker socket pair (this should improve the performance of ``wait_readable()``)
and ``wait_writable()`` when using the ``ProactorEventLoop``
(`836 <https://github.com/agronholm/anyio/pull/836>`_; PR by graingert)
- Fixed ``AssertionError`` when using ``nest-asyncio``
(`840 <https://github.com/agronholm/anyio/issues/840>`_)
- Fixed return type annotation of various context managers' ``__exit__`` method
(`847 <https://github.com/agronholm/anyio/issues/847>`_; PR by Enegg)

- Updated ``TaskGroup`` to work with asyncio's eager task factories
(`764 <https://github.com/agronholm/anyio/issues/764>`_)
- Added the ``wait_readable()`` and ``wait_writable()`` functions which will accept
an object with a ``.fileno()`` method or an integer handle, and deprecated
their now obsolete versions (``wait_socket_readable()`` and
``wait_socket_writable()``) (PR by davidbrochart)
- Changed ``EventAdapter`` (an ``Event`` with no bound async backend) to allow ``set()``
to work even before an async backend is bound to it
(`819 <https://github.com/agronholm/anyio/issues/819>`_)
- Added support for ``wait_readable()`` and ``wait_writable()`` on ``ProactorEventLoop``
(used on asyncio + Windows by default)
- Fixed a misleading ``ValueError`` in the context of DNS failures
(`815 <https://github.com/agronholm/anyio/issues/815>`_; PR by graingert)
- Fixed the return type annotations of ``readinto()`` and ``readinto1()`` methods in the
``anyio.AsyncFile`` class
(`825 <https://github.com/agronholm/anyio/issues/825>`_)
- Fixed ``TaskInfo.has_pending_cancellation()`` on asyncio returning false positives in
cleanup code on Python >= 3.11
(`832 <https://github.com/agronholm/anyio/issues/832>`_; PR by gschaffner)
- Fixed cancelled cancel scopes on asyncio calling ``asyncio.Task.uncancel`` when
propagating a ``CancelledError`` on exit to a cancelled parent scope
(`790 <https://github.com/agronholm/anyio/pull/790>`_; PR by gschaffner)

- Fixed regression caused by (`807 <https://github.com/agronholm/anyio/pull/807>`_)
that prevented the use of parametrized async fixtures

This release contains all the changes from both v4.5.1 and v4.6.0, plus:

- Fixed TaskGroup and CancelScope producing cyclic references in tracebacks
when raising exceptions (`806 <https://github.com/agronholm/anyio/pull/806>`_)
(PR by graingert)

This release is the successor to v4.5.0 with Python 3.8 support dropped, and does not
contain the changes from v4.5.1.

- Dropped support for Python 3.8
(as `698 <https://github.com/agronholm/anyio/issues/698>`_ cannot be resolved
without cancel message support)
- Fixed 100% CPU use on asyncio while waiting for an exiting task group to finish while
said task group is within a cancelled cancel scope
(`695 <https://github.com/agronholm/anyio/issues/695>`_)
- Fixed cancel scopes on asyncio not propagating ``CancelledError`` on exit when the
enclosing cancel scope has been effectively cancelled
(`698 <https://github.com/agronholm/anyio/issues/698>`_)
- Fixed asyncio task groups not yielding control to the event loop at exit if there were
no child tasks to wait on
- Fixed inconsistent task uncancellation with asyncio cancel scopes belonging to a
task group when said task group has child tasks running