>>> import numpy

>>> a=numpy.arange(1,10) #Generate some data

>>> numpy.roll(a,1)

array([9, 1, 2, 3, 4, 5, 6, 7, 8])

>>> numpy.roll(a,-1)

array([2, 3, 4, 5, 6, 7, 8, 9, 1])

>>> numpy.roll(a,5)

array([5, 6, 7, 8, 9, 1, 2, 3, 4])

>>> numpy.roll(a,9)

array([1, 2, 3, 4, 5, 6, 7, 8, 9])

​