为啥这个是不正确的？

#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
@author: Roc-xb
"""


def reverse(L):
    L1 = []
    for i in range(len(L)):
        L1.append(L[len(L) - i - 1])
    return L1


if __name__ == '__main__':
    L = [1, 2, 3]
    print(L)
    L1 = reverse(L)
    print(L1)