Python Release 3.13 News November 2025 New! Access
# Python 3.13 New Syntax with parallel() as p: for item in data_stream: p.run(process_item, item)
The headline feature of this release is the stabilization of free-threading. While Python 3.12 introduced the experimental ability to disable the GIL, Python 3.13 introduces the per-interpreter GIL as the default behavior for multi-core scaling. python release 3.13 news november 2025