我有以下清单
a = [['a', 'b', 'c'], ['d', 'e'], ['f', 'g', 'h'], ['i', 'j', 'k', 'l'], ['m', 'n'], ['o']]
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我想根据子列表的长度对列表进行排序.结果应该是:
a = [['o'],['d','e'],['m', 'n'],['a', 'b', 'c'],['f', 'g', 'h'], ['i','j','k','l']]
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