python flatten list

1flat_list = [item for sublist in t for item in sublist]
2

1flattened = [val for sublist in list_of_lists for val in sublist]

1flat_list = [item for sublist in l for item in sublist]
2
3#which is equivalent to this 
4flat_list = []
5for sublist in l:
6    for item in sublist:
7        flat_list.append(item)

1# idiomatic python
2
3# using itertools
4import itertools
5
6list_of_list = [[1, 2, 3], [4, 5], [6]]
7chain = itertools.chain(*images)
8
9flattened_list = list(chain)
10# [1, 2, 3, 4, 5, 6]

1l = [[1, 2], [3, 4], [5, 6, 7]]
2flat_list = [item for sublist in l for item in sublist]
3# flat_list = [1, 2, 3, 4, 5, 6, 7]

1itertools.chain.from_iterable(factors)