swap letters in a string in python

Question

I am trying to switch the first character in a string and move it to the end of the string. It needs to repeat the rotation a number of n times. For example, rotateLef

Answer 1

I know this is old, but you can use collections.deque:

from collections import deque

s = 'Impending doom approaches!'
d = deque(s)
d.rotate(11)
print(''.join(d))
>>> approaches!Impending doom
d.rotate(-21)
print(''.join(d))
>>> doom approaches!Impending