How to convert a python list containing several lists into single list?

Question

How do I convert a list of lists to a single list?

Input:

a=[['AA'], ['AE'], ['AH'], ['AO'],]

Desired output:

['AA','AE','AH','AO']

correct it is a duplicate. I removed my answer accordingly. – Colonel Beauvel Apr 30 '16 at 16:45 — Colonel Beauvel, Apr 30 '16 at 16:45

score 4 · Answer 1 · edited Apr 30 '16 at 16:24

4

a=[['AA'], ['AE'], ['AH'], ['AO'],]

l=[]

for i in a:
      l.extend(i)

print l

edited Apr 30 '16 at 16:24

jDo

answered Apr 30 '16 at 16:18

Ola

score 0 · Answer 2 · answered Apr 30 '16 at 16:11

0

you could use comprehension list:

or using map and lambda functions

a=[['AA'], ['AE'], ['AH'], ['AO'],]
# open the item [0] with generators
Newa = [x[0] for x in a]
>>>['AA', 'AE', 'AH', 'AO']

answered Apr 30 '16 at 16:11

Milor123

What if there are more than one element in the nested lists? – jDo Apr 30 '16 at 16:20

Cosinux · Answer 3 · 2016-04-30T16:29:31.173

-2

EDIT:

for i, value in enumerate(a):
    a[i] = value[0]

edited Apr 30 '16 at 16:29

answered Apr 30 '16 at 16:11

Cosinux

3 Answers3