Wrapping around a list as a slice operation

Question

Consider the following simple python code

>>> L = range(3)
>>> L
[0, 1, 2]

We can take slices of this array as follows:

Answer 1

Left:

L[:1], L[1:] = L[-1:], L[:-1]

Right:

L[-1:], L[:-1] = L[:1], L[1:]