Write a function to check if the given tuple list has all k elements.
def check_k_elements(test_list, K):
  res = True
  for tup in test_list:
    for ele in tup:
      if ele != K:
        res = False
  return (res) 
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a function to check if the given tuple list has all k elements.
def check_k_elements(test_list, K):
  res = True
  for tup in test_list:
    for ele in tup:
      if ele != K:
        res = False
  return (res) [/INST]assert check_k_elements([(4, 4), (4, 4, 4), (4, 4), (4, 4, 4, 4), (4, )], 4) == True
assert check_k_elements([(7, 7, 7), (7, 7)], 7) == True
assert check_k_elements([(9, 9), (9, 9, 9, 9)], 7) == False</s>