Python: Combining a list of lists

Question

Suppose I have a list of lists, like [[1, 2], [3, 4], [5, 6], [7, 8]]. What is the most elegant way in python to get [1, 2, 3, 4, 5, 6, 7, 8]?

I found this one: `import itertools` and then `myCombinedList = itertools.chain(*mylistOfLists)` Helped me get going! — Aufwind, Apr 27 '11 at 17:00

score 2 · Accepted Answer · answered Apr 27 '11 at 16:52

2

myCombinedList = []
[myCombinedList.extend(inner) for inner in mylistOfLists]

Or:

import itertools
myCombinedIterable = itertools.chain.from_iterable(mylistOfLists)
myCombinedList = list(myCombinedIterable)

answered Apr 27 '11 at 16:52

jathanism

If you want to extend the list, yes. (You can't extend something that's not already there). – jathanism Apr 27 '11 at 16:55

score 0 · Answer 2 · answered Apr 27 '11 at 16:20

0

res=[]    
for item in mylistOfList:
        res+=item

answered Apr 27 '11 at 16:20

matcheek

2 Answers2