find_pairs_sum_k.py

def find_pairs(num_array, k):
  pairs_array = []
  for num in num_array:
    if (k-num) in num_array:
      pairs_array.append((num, (k-num)))
  return pairs_array

result = find_pairs([0, 14, 0, 4, 7, 8, 3, 5, 7], 11)
print(result)