Программа с индексами в массиве

b=int(input())
arr = [m for m in range(10)]
for i in arr:
    print(arr.index(i))

b=int(input())
arr = [m for m in range(10)]
print(arr)
for i in range(len(arr)):
    for j in range(i+1, len(arr)):
        if arr[i]+arr[j] == b:
            print(i, j)

7
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
0 7
1 6
2 5
3 4

b=int(input())
arr = [m for m in range(10)]
print(arr)
fl = False
for i in range(len(arr)):
    if fl:
        break
    for j in range(i+1, len(arr)):
        if arr[i]+arr[j] == b:
            print(i, j)
            fl = True
            break

7
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
0 7

def couple(arr):
    for i in range(len(arr)):
        for j in range(i+1, len(arr)):
            if arr[i]+arr[j] == b:
                return i,j
    return 'упс'
 
 
b=int(input())
arr = [m for m in range(10)]
print(arr) 
print(couple(arr))

n = 7
a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
b = [n-x for x in a]
print(a)
print(b)

b=float(input())
arr = [1, 2, float('inf'), float('-inf')]
print(arr)
for i in range(len(arr)):
    for j in range(i+1, len(arr)):
        if arr[i]+arr[j] == b:
            print(i, j)

inf
[1, 2, inf, -inf]
0 2
1 2

-inf
[1, 2, inf, -inf]
0 3
1 3