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Python Python Basics (2015) Shopping List App Refactor

Posted by srinath Gopathi
srinath Gopathi
552 Points

Where I'm going wrong???

I tried to intend properly inside the main function. It doesn't work at all

shopping_list.py 
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(shopping_list):
    # print out the list
    print("Here's your list:")

    for item in shopping_list:
        print(item)

def add_to_list(shopping_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)))
    return shopping_list

def main():
    show_help()

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

    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(shopping_list)
        continue
        add_to_list(shopping_list, new_item)

show_list(shopping_list)

2 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

Items in the while block are not indented sufficiently. Currently there is no code in the while loop.

Post back if you need more help. Good luck!!!

srinath Gopathi
srinath Gopathi
552 Points

I tried to intend properly but i don't know where i"m going wrong

srinath Gopathi
srinath Gopathi
552 Points
srinath Gopathi
srinath Gopathi
552 Points 
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(shopping_list):
    # print out the list
    print("Here's your list:")

    for item in shopping_list:
        print(item)

def add_to_list(shopping_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)))
    return shopping_list

def main():
    show_help()
# make a list to hold onto our items
    shopping_list = []

    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(shopping_list)
            continue

add_to_list(shopping_list, new_item)

show_list(shopping_list)

[MOD: added ```python formatting -cf]

Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

The if/elif/elif statement isn't aligned with the assignment statement above it. Also the add_to_list and show_list statement need to indented properly. They should all stay indented relatively the same to each other as in the original code.