It's not implemented like that and couldn't be. They aren't arrays unless you consider them arrays of pointers but this isn't a useful definition in Python. An

It's not implemented like that and couldn't be. They aren't arrays unless you consider them arrays of pointers but this isn't a useful definition in Python. An array contains a number of elements of the same size. That means you can find the memory address of any element by simple arithmetic: array_loc + index * element_size. Python lists can contain objects of any type and the objects can't be found using arithmetic like that.