python merge list of lists

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showing results for - "python merge list of lists"
Loanne
11 Sep 2017
1flattened = [val for sublist in list_of_lists for val in sublist]
Sabrina
24 Jun 2018
1import itertools
2a = [['a','b'], ['c']]
3print(list(itertools.chain.from_iterable(a)))
4
Liah
21 Feb 2019
1# Basic syntax:
2first_list.append(second_list) # Append adds the the second_list as an
3#	element to the first_list
4first_list.extend(second_list) # Extend combines the elements of the 
5#	first_list and the second_list
6
7# Note, both append and extend modify the first_list in place
8
9# Example usage for append:
10first_list = [1, 2, 3, 4, 5]
11second_list = [6, 7, 8, 9]
12first_list.append(second_list)
13print(first_list)
14--> [1, 2, 3, 4, 5, [6, 7, 8, 9]]
15
16# Example usage for extend:
17first_list = [1, 2, 3, 4, 5]
18second_list = [6, 7, 8, 9]
19first_list.extend(second_list)
20print(first_list)
21--> [1, 2, 3, 4, 5, 6, 7, 8, 9]
Reid
30 Oct 2020
1flat_list = [item for sublist in t for item in sublist]
Louisa
08 Jan 2021
1x = [["a","b"], ["c"]]
2
3result = sum(x, [])
4# This combines the lists within the list into a single list
Ivan
04 Mar 2019
1l1 = ["a", "b" , "c"]
2l2 = [1, 2, 3]
3l1 + l2
4>>> ['a', 'b', 'c', 1, 2, 3]
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