Python, error putting comb result list using recursion.

It's a situation that's caused by a lack of understanding of recursive functions, but it's not resolved <

I want to add the nCr result to the list using the recursive function

Simply put, if it is 4c2, the result value 1, 2/1, 3/1, 4/2, 3/2, 4/3, 4 is added to the specific list

If you print (result) in the r==0 situation, it will be printed normally

If you use fianl.append(result) and put it into the final, the final will only contain the final value of the recursive function. I've tried dealing with global variables and this and that, but it's not solved. Can you tell me why?

In the r==0 situation, once the result comes out, you have to put it in the final, but it seems that you put the last result value in the final after the recursive function Why is that?

I think n=int('n:') doesn't work because it's running on the web page;

n=int(input('n:'))
r=n//2
# Just briefly find the nC(n/2) situation 

li=[x+1 for x in range(n)] Create a list from #1 to n
result=[0]*r #Each result value

final=[] # The final list that you want to include the results

def comb(n,r):   

    if r==0:

        final.append(result)          
        return


    elif n<r:
        return

    else:

        result[r-1]=li[n-1]



        comb(n-1,r-1)   
        comb(n-1,r)


comb(n,r)    

print(final) #It is not the normal output expected here, but only enters the final value when the recursive function is rotated.