removing single notations and practices [] from list items in python

Question

I have a list with a strange structure as follows:

List_input = [['statment01'], ['statment02'], ['statment03'],.....['statement1000']]

I need to remove the inner brackets [] and the single notations of each item.

The required output list is like this:

List_output = ["statment01", "statment02", "statment03",....., "statement1000"]

Could anyone help with this?

Does this answer your question? [join list of lists in python](https://stackoverflow.com/questions/716477/join-list-of-lists-in-python) — PacketLoss, Jan 17 '20 at 05:11
Does this answer your question? [How to make a flat list out of list of lists?](https://stackoverflow.com/questions/952914/how-to-make-a-flat-list-out-of-list-of-lists) — Aiden Ray, Jan 17 '20 at 05:15

score 1 · Answer 1 · answered Jan 17 '20 at 05:13

I hope this is what u r expecting:

def remove_nest(l): 
    for i in l: 
        if type(i) == list: 
            remove_nest(i) 
        else: 
            output.append(i) 

l = [[1,2,3],[4,5,6],[6,7,8]] 
output = []    
print ('The given list: ', l) 
remove_nest(l) 
print ('The list after removing nesting: ', output)

OUTPUT:

The given list:  [[1, 2, 3], [4, 5, 6], [6, 7, 8]]
The list after removing nesting:  [1, 2, 3, 4, 5, 6, 6, 7, 8]

score 1 · Accepted Answer · answered Jan 17 '20 at 05:14

1

Just iterate over list and append it to new array.

List_output = []
for i in List_input:
    List_output.append(i[0])

answered Jan 17 '20 at 05:14

Santhosh Kumar

543
8
22

It will just append only the first element of the list @MohsenAli – Amaresh S M Jan 17 '20 at 05:43
Thats what his requirement @AmareshSM – Santhosh Kumar Jan 17 '20 at 05:46
maybe, but the question he asked was general @SanthoshKumar – Amaresh S M Jan 17 '20 at 05:49
"I need to remove the inner brackets [] and the single notations of each item." and he gave an input and expected output too for reference. – Santhosh Kumar Jan 17 '20 at 05:51

removing single notations and practices [] from list items in python

2 Answers2