GoKawiilPython 3.15.0 released with new profiling tools and typing features
The Python Software Foundation shipped Python 3.15.0 on Oct. 9, 2026, incorporating 5,643 commits from 1,012 contributors since version 3.14. The release includes a dedicated profiling package and sampling profiler under PEP 799, new typing capabilities such as TypedDict with typed extra items and TypeForm annotations, and C API updates including a new bytes-writer API and stable ABI support for free-threaded builds.