Sourced from anyio's changelog.

Version history

This library adheres to Semantic Versioning 2.0 <http://semver.org/>_.

4.0.0rc1

• BACKWARDS INCOMPATIBLE Replaced AnyIO's own ExceptionGroup class with the PEP 654 BaseExceptionGroup and ExceptionGroup

• BACKWARDS INCOMPATIBLE Changes to cancellation semantics:

  • Any exceptions raising out of a task groups are now nested inside an ExceptionGroup (or BaseExceptionGroup if one or more BaseException were included)
  • Fixed task group not raising a cancellation exception on asyncio at exit if no child tasks were spawned and an outer cancellation scope had been cancelled before
  • Ensured that exiting a TaskGroup always hits a yield point, regardless of whether there are running child tasks to be waited on
  • On asyncio, cancel scopes will defer cancelling tasks that are scheduled to resume with a finished future
  • On asyncio and Python 3.9 or later, cancel scopes now only suppress cancellation exceptions if the cancel message matches the scope
  • Task groups on all backends now raise a single cancellation exception when an outer cancel scope is cancelled, and no exceptions other than cancellation exceptions are raised in the group

• BACKWARDS INCOMPATIBLE Changes the pytest plugin to run all tests and fixtures in the same task, allowing fixtures to set context variables for tests and other fixtures

• BACKWARDS INCOMPATIBLE Changed anyio.Path.relative_to() and anyio.Path.is_relative_to() to only accept one argument, as passing multiple arguments is deprecated as of Python 3.12

• BACKWARDS INCOMPATIBLE Dropped support for spawning tasks from old-style coroutine functions (@asyncio.coroutine)

• BACKWARDS INCOMPATIBLE The policy option on the asyncio backend was changed to loop_factory to accommodate asyncio.Runner

• Changed anyio.run() to use asyncio.Runner (or a back-ported version of it on Pythons older than 3.11) on the asyncio backend

• Dropped support for Python 3.7

• Added support for Python 3.12

• Bumped minimum version of trio to v0.22

• Added the anyio.Path.is_junction() and anyio.Path.walk() methods

• Added create_unix_datagram_socket and create_connected_unix_datagram_socket to create UNIX datagram sockets (PR by Jean Hominal)

• Added the CancelScope.cancelled_caught property which tells users if the cancel scope suppressed a cancellation exception

• Fixed fail_after() raising an unwarranted TimeoutError when the cancel scope was cancelled before reaching its deadline

• Fixed MemoryObjectReceiveStream.receive() causing the receiving task on asyncio to remain in a cancelled state if the operation was cancelled after an item was queued to be received by the task (but before the task could actually receive the item)

• Fixed TaskGroup.start() on asyncio not responding to cancellation from the outside

... (truncated)

• 3e182fa Bumped up the version
• d920654 Fixed cache dependency path in GitHub test workflow
• da94a29 Fixed several Sphinx build issues
• f1f9991 Fixed sending large buffers on UNIX stream sockets on asyncio
• 052634c Updated pre-commit modules
• f7a880f Bumped up the version
• 4942cdc Added the Typing::Typed classifier
• 35758cc Removed Python 3.12 from the test matrix for now
• 97ae69c Added Python 3.12 to test matrix and used editable mode when testing
• 79d5cc6 Fixed Sphinx build warnings
• Additional commits viewable in compare view

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