The closest thing to a "language spec" is https://docs.python.org/3/reference/index.html https://docs.python.org/3/reference/index.html, which still contains a

The closest thing to a "language spec" is https://docs.python.org/3/reference/index.html https://docs.python.org/3/reference/index.html, which still contains a lot of CPython specific/internal implementations (e.g. https://docs.python.org/3/reference/datamodel.html?highlight=cpython https://docs.python.org/3/reference/datamodel.html?highlight...). This, and combined with https://www.hyrumslaw.com/ https://www.hyrumslaw.com/, makes this "Python Language Reference" a "CPython Language Reference".