from itertools import product

my_list = [45, 32, 67, 11, 88, 90, 87, 33, 45, 32]
print("列表是：")
print(my_list)

N = 77
print("N的值是")
print(N)
K = 2
print("K的值是")
print(K)

my_result = []
for sub in product(my_list, repeat = K):
   if sum(sub) == N:
      my_result.append(sub)

print("结果是：" )
print(my_result)

The list is :
[45, 32, 67, 11, 88, 90, 87, 33, 45, 32]
The value of N is
77
The value of K is
2
The result is :
[(45, 32), (45, 32), (32, 45), (32, 45), (45, 32), (45, 32), (32, 45), (32, 45)]