Python doesn't really have a spec in the way that, say, C# does. The docs are missing things like whether the argument is positional-only, exact exceptions rais

Python doesn't really have a spec in the way that, say, C# does. The docs are missing things like whether the argument is positional-only, exact exceptions raised in all cases, and time complexity of common operations. That said, I think every implementation uses contiguous memory. PyPy has list "strategies" int[], double[] and PyObject[] and probably more, switching transparently between them.