number_list = [ 10, 14, 19, 26, 27, 31, 33, 35, 42, 44]
target_number = 33

def linear_search(search_list, target_value):
  for idx in range(len(search_list)):
    if search_list[idx] == target_value:
      return idx
  raise ValueError("{0} not in list".format(target_value))


try:
  # Call the function below...
  result = linear_search(number_list, target_number)
  print(result)
  linear_search(number_list, 100)
except ValueError as error_message:
  print("{0}".format(error_message))