unpacking lists inside another list python

Question

Assume you have a list :

mylist=[[1,2,3,4],[2,3,4,5],[3,4,5,6]]

any pythonic(2.x) way to unpack the inner lists so that new list should look like ?:

mylist_n=[1,2,3,4,2,3,4,5,3,4,5,6]

and http://stackoverflow.com/questions/952914/making-a-flat-list-out-of-list-of-lists-in-python — Padraic Cunningham, Sep 11 '15 at 20:48

score 6 · Answer 1 · answered Sep 11 '15 at 20:48

6

import itertools
mylist=[[1,2,3,4],[2,3,4,5],[3,4,5,6]]
print list(itertools.chain(*mylist))

answered Sep 11 '15 at 20:48

Cody Bouche

score 6 · Answer 2 · answered Sep 11 '15 at 20:48

6

mylist_n = [j for i in mylist for j in i]

answered Sep 11 '15 at 20:48

John La Rooy

Would you mind explaining the last part "**for j in i**" I do not get it, what does this mean? – AmirWG Aug 08 '22 at 20:38

2 Answers2