Merging only the sublists but not all of them into one list in Python

Could somebody please tell me how can I merge the following list:

[[['a', 'b'], ['b', 'a'], ['c', 'c']], [['d', 'e'], ['e', 'd']]]

into:

[['ab', 'ba', 'cc'], ['de', 'ed']]?

Thank you!

>Solution :

IIUC, you need to map the join on all the sublists:

l = [[['a', 'b'], ['b', 'a'], ['c', 'c']], [['d', 'e'], ['e', 'd']]]

out = [list(map(''.join, x)) for x in l]

Or:

out = [[''.join(i) for i in x] for x in l

Output: [['ab', 'ba', 'cc'], ['de', 'ed']]