哈哈，想多了，没那么复杂，无需任何import。

def vertical_chars(p,r):
        n = len(p)
        rl = n % r
        c = n // r + (rl != 0)
        pv = []

        for i in range(r):
                pi = []
                for j in range(c):
                        if  rl != 0 and i >= rl and j == 0:
                                pi.append(' ' * 2)
                                continue
                        ch = p[(c - j - 1) * r + i]
                        if ord(ch) <= 255:
                                ch += ' '
                        pi.append(ch)
                pv.append(pi)
        return pv

【 在 dabada 的大作中提到: 】
: 核心算法是矩阵转置？
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