第11870题
如下Python递归实现n位格雷码的代码中,横线处应填入的选项是?
def generate_gray_code(n):
    if n <= 0:
        return []
    if n == 1:
        return [0, 1]
    gray_code = generate_gray_code(n - 1)
    ———————
    for x in gray_code]
    return gray_code + inverted_gray_code
A

inverted_gray_code = [int(('0' * n + bin(x)[2:])[-n:], 2)

B

inverted_gray_code = [int(('1' * n + bin(x)[2:])[-n:], 2)

C

inverted_gray_code = [int(('1' * n + bin(x)[1:])[-n:], 2)

D

inverted_gray_code = [int(('1' * n + bin(x)[2:])[n:], 2)