Python 313 Release Notes Verified High Quality Direct

This mode is available as an experimental feature in Windows and macOS installers, enabling developers to test their code's thread safety.

introduces default values for type parameters. TypeVar , ParamSpec , and TypeVarTuple now accept a default argument, simplifying generic class definitions. This aligns the typing system with function parameters, where defaults have long been standard. python 313 release notes verified

: Standard operations like exit and help now execute natively without needing parenthetical evaluation like exit() . 2. Experimental Free-Threaded Mode (PEP 703) This mode is available as an experimental feature