Tried code as entered, keep getting different results

Question

create a new empty list called shopping_list
shopping_list = []
create a function named addtolist that declares a parameter named item
def addtolist(item):
    # add the item to the list
    shoppinglist.append(item)
    # notify user of total items in list
    print("Added! List has {} items.".format(len(shoppinglist)))
def showhelp():
    print("What should we pick up at the store?")
    print("""
Enter 'DONE' to stop adding items.
Enter 'HELP' for this help.
Enter 'SHOW' to see the whole list.
    """)
print(showhelp())
def showlist():
    for item in shoppinglist:
        print("Here's your list:")
        for item in shopping_list:
            print(item)
while True:
    new_item = input("> ")  # prompts for new data to be added to list
if new_item == 'DONE':  # terminates prompt when DONE is entered
    break               # breaks the loop
elif new_item == 'HELP':
    show_help()
    continue
elif new_item == 'SHOW':
    show_list()
    continue

# call add_to_list with new_item as an argument
add_to_list(new_item)
print(show_list())
the word "none" keeps showing up in my lists, and my list repeats twice when I use "DONE" command

Steven Parker · Answer

The unformatted lines make it hard to be sure, but I think I see two issues:
1. The function show_list() is defined having two loops, but it should only have the second one.
2. On the last line, show_list() should be called directly.  By printing it, you get the extra "None" since the function itself does not return any value.
And while you didn't mention it, the same thing (getting a "None" at the end) happens when you print show_help() instead of calling it directly.

Bienvenido a la Comunidad de Treehouse

¿Buscas aprender algo nuevo?

Miles Welch

Miles Welch

Intenté el código tal como se ingresó, sigo obteniendo resultados diferentes

crear una nueva lista vacía llamada shopping_list

crear una función nombrada add_to_list que declara un parámetro nombrado item

Steven Parker

Steven Parker

1 Respuesta

Steven Parker

Steven Parker