Python: sort a list of lists

Question

I have a list which has nested lists. These nested lists are sentences. I want to randomize the order of sentences, but the random.shuffle() method does not supported nested lists.

[['A', 'B'],['C','D'],['E','F']]

I only want to reorder the sentences (randomly) not the words in the sentence, how can I achieve that?

Answer 1

shuffle is working fine for me.

>>>from random import shuffle
>>>l=[['a','b'],['c','d'],['e','f']]
>>>shuffle(l)
>>>l
[['c', 'd'], ['a', 'b'], ['e', 'f']]
>>>shuffle(l)
>>>l
[['c', 'd'], ['e', 'f'], ['a', 'b']]

Answer 2

This might help you as example

import random
def deep_shuffle_iter(i):
    try:
        map(shuffle_iter, random.shuffle(i))
    except TypeError: pass

It does shuffle of iters using recursion

eg

>>> asd = [[0,1],[2,3],[4]]
>>> shuffle_iter(asd)
>>> asd
[[4], [2, 3], [0, 1]]