Rotate a deque

Write a Python program to rotate a list of players for a round-robin game.

1 ['A', 'B', 'C', 'D']
2 ['B', 'C', 'D', 'A']
3 ['C', 'D', 'A', 'B']

Approach

1. rotate(n) moves items from the end to the front.

Solution

from collections import deque players = deque(["A", "B", "C", "D"])for round_no in range(1, 4):    print(round_no, list(players))    players.rotate(-1)

1 ['A', 'B', 'C', 'D']
2 ['B', 'C', 'D', 'A']
3 ['C', 'D', 'A', 'B']

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