input: Write a function to create a loop in Python that prints each item of a given list with a custom message. The function should take a list as input and iterate through each item, printing "The item is: {item}". If the list is empty, the function should print "The list is empty.".
  assert print_list_items(['A', 'B', 'C', 'D'])==None
  assert print_list_items([])==None
output: def print_list_items(lst):
      if not lst:
          print("The list is empty.")
      else:
          for item in lst:
              print(f"The item is: {item}")