psycopg_pool release notes#

Add a hint to the warning printed if threads fail to stop during __del__, which has been reported happening during interpreter shutdown on Python 3.13 (see ticket #954).

Add metadata to declare compatibility with Python 3.13.

Raise a RuntimeWarning instead of a DeprecationWarning if an async pool is open in the constructor.

Fix connections possibly left in the pool after closing (ticket #784).

Use an empty query instead of SELECT 1 to check connections (ticket #790).

Respect the timeout parameter on connection() when check fails. Also avoid a busy-loop of checking; separate check attempts using an exponential backoff (ticket #709).

Use typing.Self as a more correct return value annotation of context managers and other self-returning methods (see ticket 708).

Fix the return type annotation of NullConnectionPool.__enter__() (ticket #540).

Enforce connections’ max_lifetime on check() (ticket #482).

Fix handling of tasks cancelled while waiting in async pool queue (ticket #503).

Declare all parameters in pools constructors, instead of using **kwargs (ticket #493).

Make sure that ConnectionPool.check() refills an empty pool (ticket #438).

Avoid error in Pyright caused by aliasing TypeAlias (ticket #439).

Fix async pool exhausting connections, happening if the pool is created before the event loop is started (ticket #219).

Add support for Python 3.11 (ticket #305).

Fix possible failure to reconnect after losing connection from the server (ticket #370).

Fix race condition on pool creation which might result in the pool not filling (ticket #230).

Raise ValueError if ConnectionPool min_size and max_size are both set to 0 (instead of hanging).

Raise PoolClosed calling wait() on a closed pool.

Remove dependency on the internal psycopg._compat module.

Don’t leave connections idle in transaction after calling check() (ticket #144).