[Tutor] Trying to find all pairs of numbers from list whose sum is 10

[Manprit Singh]

Dear sir,

Let us consider a list
lst = [2, 4, 7, 5, 9, 0, 8, 5, 3, 8]
in this list there are 3 pairs (2, 8), (5, 5), (7, 3) whose sum is 10. To
finding these pairs i have written the code as below :

def pair_ten(x):
    y, st  = x[:], set()
    for i in x:
        y.remove(i)
        st.update((i, ele) for ele in y if i+ele == 10)
    return st



lst = [2, 4, 7, 5, 9, 0, 8, 5, 3, 8]
ans = pair_ten(lst)
print(ans)

{(2, 8), (5, 5), (7, 3)}

But i feel the code is still more complex, due to two for loops, in
what way this ccan be dome more efficiently.

kindly guide

Regards

Manprit singh