def get_pukes(num):
    result = [num]
    for k in range(num - 1, 0, -1):
        for _ in range(k):
            result = reverse(result)
        result.insert(0, k)
    return result


def reverse(pukes):
    last = pukes[-1]
    del pukes[-1]
    pukes.insert(0, last)
    return pukes


if __name__ == '__main__':
    print(get_pukes(20))

D:\Anaconda\python.exe D:/AI20/06_codes/deeplearning_20/p23_puke.py
[1, 6, 2, 8, 16, 3, 17, 19, 14, 4, 13, 7, 20, 10, 5, 11, 9, 18, 15, 12]

Process finished with exit code 0