All sums combinations of N as tuple

I want to store all pairs which are sum of N as tuples.
Here is my code so far:

m = []
l = []
degree = 9
for i in range(0, degree):
    m += [degree - i];
    l += [i]
    pairs = (m[i]),(l[i])    
pairs

This code return only last pair:

(1, 8)

What I want is this:

(9, 0),(8, 1),(7, 2),(6, 3),(5, 4),(4, 5),(3, 6),(2, 7),(1, 8)

How to do it?

>Solution :

You can do it this way by defining a new pair’s list, appending it inside the loop, and finally printing.

m = []
l = []
degree = 9
pairs = []
for i in range(0, degree):
    m += [degree - i];
    l += [i]
    pairs.append((m[i],l[i]))
print(pairs)