Quick question

shopping_list = []

def show_help():
    print("What should we pick up at the store?")
    print("""
Enter 'DONE' to stop adding items
Enter 'HELP' for this help
Enter 'SHOW' to show all the items on your list
""")


def add_to_list(item):
    shopping_list.append(item)
    print("{} is added to your list. You now have a total number of {} item(s) on your list.".format(new_item.title(), len(shopping_list)))


def show_list():
    print("The item(s) on your list are/is:")
    for item in shopping_list:
        print(item)


show_help()

while True:
    new_item = input(">  ")

    if new_item == 'DONE':
        break
    elif new_item == 'HELP':
        show_help()
        continue
    elif new_item == 'SHOW':
        show_list() #This already does the right thing
        continue

    add_to_list(new_item)
    print(shopping_list)

show_list() # I don't understand why we need to call this again here