有没有一种递归的方法来生成这个字符串数组？

def generate_strings(n):
    if n == 0:
        return []
    if n == 1:
        return [chr(ord('a') + i) for i in range(26)]
    else:
        prev_strings = generate_strings(n-1)
        new_strings = []
        for prev_string in prev_strings:
            for i in range(26):
                new_strings.append(prev_string + chr(ord('a') + i))
        return new_strings

n = 3  # 生成长度为3的字符串数组
strings = generate_strings(n)
print(strings)