关于列表中元素筛选的问题

[caizhen1988911]

大家好，我有个问题想请教一下大家，我想对一个列表进行处理，除去列表中一些元素。具体如下：
m=[[1,2,3,4,5,6,7,8,9,10,11,12,13],[7,9,13,15,16,17,18,19,20,21,22,23],[17,19,20,21,22,23,24,25,26,27,28,19],[24,25,27,30,31,32,33,34,35,36,37,38,39,49,50],[3,4,5,6,7,8,33,45,46,47,56,57,58,59],[46,47,58,70,71,83,54,65,76,81,93,94],[100,101,102,103,104,105,106,107,120,121,123,125,146,147],[89,90,91,95,103,104,105,137,148,159,198,199,201]]
列表m的子列表个数还可以增加，我的目标是对列表m中的子列表进行处理，使后面的子列表不含之前子列表里面的元素，想问下大家有没有比较简单的方法，非常感谢！

[anonymous2102]

写得比较菜，得到的结果也没有保留原来的子列表元素的顺序，你看看能不能用。

from pprint import pprint

def main():
    m=[[1,2,3,4,5,6,7,8,9,10,11,12,13],
        [7,9,13,15,16,17,18,19,20,21,22,23],
        [17,19,20,21,22,23,24,25,26,27,28,19],
        [24,25,27,30,31,32,33,34,35,36,37,38,39,49,50],
        [3,4,5,6,7,8,33,45,46,47,56,57,58,59],
        [46,47,58,70,71,83,54,65,76,81,93,94],
        [100,101,102,103,104,105,106,107,120,121,123,125,146,147],
        [89,90,91,95,103,104,105,137,148,159,198,199,201]]
    s1=[]
    for i in range(len(m)):
        m[i]=list(set(m[i])-set(s1))
        s1.extend(m[i])
        s1=list(set(s1))
    pprint(m)

if __name__ == '__main__':
    main()

[caizhen1988911]

非常谢谢你，可以用的。