Is there any way I can get rid of the [] in the beginning? Python

Asked Apr 27 '22 at 10:37

Active Apr 27 '22 at 10:54

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My code is to get the combination of the user's input but I want to remove the [] at the start of the output. How can I do it? And is there any way to change my output to [[1],[2],[3],[1,2]...]?

def combination(number):
    if len(number) == 0:
        return [[]]
    cs = []
    for c in combination(number[1:]):
        cs += [c, c+[number[0]]]
    return cs
    
number = [1, 2, 3]
print(combination(number))

Currently, I am getting the following output:

[[], [1], [2], [2, 1], [3], [3, 1], [3, 2], [3, 2, 1]]

edited Apr 27 '22 at 10:54

Abhyuday Vaish

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asked Apr 27 '22 at 10:37

Muhammad Abdus Salam

Are you aware that itertools have a function for this called combinations (see [docs.python.org/...#itertools.combinations](https://docs.python.org/3/library/itertools.html#itertools.combinations)) which returns an iterator over you combinations? – Jakub Opršal Apr 27 '22 at 10:44
Yes, I am aware but I want to solve this problem using different approach without using any import. – Muhammad Abdus Salam Apr 27 '22 at 10:51
What if you just print all elements leaving out the first one? Like this `print(combination(number)[1:])` – Abhyuday Vaish Apr 27 '22 at 10:58
I can't because the unit test will fail – Muhammad Abdus Salam Apr 27 '22 at 11:06
You can try [removing the first element](https://stackoverflow.com/questions/1534939/how-to-slice-a-list-in-python). – Alias Cartellano Apr 27 '22 at 21:27

Is there any way I can get rid of the [] in the beginning? Python

0 Answers0