Python 313 Release Notes Verified 【480p 2027】

Emscripten (the compilation target for WebAssembly) is no longer an officially supported platform, though Pyodide continues to provide Emscripten support independently.

❌ No stable ABI for free-threaded builds. ❌ No automatic GIL removal — you must rebuild Python. ❌ No performance revolution from JIT yet. python 313 release notes verified