Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Introducing Lists Build an Application Add Items

Stephen Ambler
Stephen Ambler
8,236 Points
Posted by Stephen Ambler
Stephen Ambler
8,236 Points

Not adding to list

Create a new empty list named shopping_list

shopping_list = []

Create a funcation named add_to_list that declares a parameter named item

def add_to_list(item): # Add the item to the list shopping_list.append(item) # Notify user that the item was added, and state the number of items within the list. print("Added! list has {} items.".format(len(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. """)

show_help() while True: new_item = input("> ")

if new_item == "DONE":
    break
elif new_item == "HELP":
    show_help()
    continue

    # Call add_to_list with new_item as an argument
    add_to_list(new_item)

I dont understand what i am doing wrong.

3 Answers

Stephen Ambler
Stephen Ambler
8,236 Points
Stephen Ambler
Stephen Ambler
8,236 Points

Create a new empty list named shopping_list

shopping_list = []

Create a funcation named add_to_list that declares a parameter named item

def add_to_list(item): # Add the item to the list shopping_list.append(item) # Notify user that the item was added, and state the number of items within the list. print("Added! list has {} items.".format(len(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. """)

show_help() while True: new_item = input("> ")

if new_item == "DONE":
    break
elif new_item == "HELP":
    show_help()
    continue

    # Call add_to_list with new_item as an argument
    add_to_list(new_item)
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

add_to_list(new_item) is indented too far so it's under elif new_item == "HELP": . It won't execute there due to continue. The solution is to outdent add_to_list(new_item) so that it lines up at the same level as the if statement.

Stephen Ambler
Stephen Ambler
8,236 Points
Stephen Ambler
Stephen Ambler
8,236 Points

Thank you ive seen it now you legend :)