# warnings

PEP 702: The new `warnings.deprecated()` decorator provides a way to communicate deprecations to a static type checker and to warn on usage of deprecated classes and functions. A `DeprecationWarning` may also be emitted when a decorated function or class is used at runtime. (Contributed by Jelle Zijlstra in `gh-104003`.)

# multiprocessing

The default number of worker threads and processes is now selected using `os.process_cpu_count()` instead of `os.cpu_count()`. (Contributed by Victor Stinner in `gh-109649`.)