为什么Python当着我的眼犯错？

def trans_list(l1):
    info = []
    current = []
    count = 0
    for i in l1:
        if not i:
            count += 1
        elif count:
            current.append(count)
            count = 0
    if count: current.append(count)
    print(current)
    index = 0
    for i in current:
        s = (index, index + i + 1)
        index += i + 1
        info.append(s)
    return info


def dif(*lines):
    info = [[]]*len(lines)
    # assert len(info) > 1
    num = len(lines[0])
    for i in range(num):
        print('i:', i, 'info:', info)
        v = lines[0][i]
        sm = True
        for index, j in enumerate(lines[1:]):
            if len(j) > i:
                if j[i] != v:
                    sm = False
                    print(index + 1)
                    info[index + 1].append(False)
                    print(info)
                else:
                    info[index + 1].append(True)
                    print(info)
        info[0].append(sm)
        print(info)
    print(info)

    # 转换info
    return [trans_list(i) for i in info]



print(dif('qwes', 'wwerr'))

运行这段代码，发现info内的两个子列表不知道为什么同时被增加了？？？？？？？？？

明明只有“info[1].append(False)”的！