Class Shuffle problem

shuffleclass.py

from collections import deque

def shuffleClass(arr, n):
	if arr is None or len(arr) == 0: return []
	if n is None: return arr

	arr = deque(arr)
	if n >= 0:
		for _ in range(n % len(arr)):
			arr.appendleft(arr.pop())
	else:
		for _ in range(abs(n) % len(arr)):
			arr.append(arr.popleft())

	return list(arr)

print(shuffleClass([2,3], 3))

Hello @meekg33k, thanks for the feedback I really appreciate it, and I've updated my code to handle edge cases where I failed at. Thank you.