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Python Python Basics (2015) Shopping List App Second Shopping List App

Christian Rachal
Christian Rachal
4,039 Points
Posted by Christian Rachal
Christian Rachal
4,039 Points

List not showing after new_item == 'DONE' or new_item == 'SHOW'

I'm trying to get the list to show the items I've added either by entering SHOW or DONE. My def add_to_list(new_item) function is also not working. When I enter items, it doesn't tell me how many are in the list.

# make a list to hold onto our items
shopping_list = []

def show_help():
    # print out instructions on how to use the app
    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 your current list.
""")

def show_list():
    # print out the list
    print("Here's your list:")

    for item in shopping_list:
        print(item)

def add_to_list(new_item):
    # add new items to our list
    shopping_list.append(new_item)
    print("Added {}. List now has {} items.".format(new_item, len(shopping_list)))

show_help()

while True:
    # ask for new items
    new_item = input("> ")

    # be able to quit the app    
    if new_item == 'DONE':
        break
    elif new_item =='HELP':
        show_help()
        continue
    elif new_item == 'SHOW':
        show_list()
        continue

show_list()
juliansteffen
juliansteffen
9,802 Points

In this format a bit difficult to see the error. you just need 

def methode_name():

Check the preview function until i has the right format

1 Answer

Jeff Muday
MOD
Jeff Muday
Treehouse Moderator 28,722 Points
Jeff Muday
Jeff Muday
Treehouse Moderator 28,722 Points

Very close! You forgot to add the item to your list in your main loop -- look at the last 'else' clause and add the item and then it should work perfectly!

while True:
    # ask for new items
    new_item = input("> ")

    # be able to quit the app    
    if new_item == 'DONE':
        break
    elif new_item =='HELP':
        show_help()
        continue
    elif new_item == 'SHOW':
        show_list()
        continue
    else:
        add_to_list(new_item)