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Python Python Basics (2015) Shopping List App Refactor

Refactor challange

What am i doing wrong here:

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)

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

Fenimore Cooper
Fenimore Cooper
3,591 Points

Hi Dave,

Looks like you had the right idea -- and you correctly put the body of the code into the main() function. I think if you double check your syntax it will be working in no time.

You will notice that your indentation is inconsistent -- you have only 2 spaces for much of your main() function, whereas you have 4 spaces for the first line of it (and everywhere else). This will confuse the interpreter. Shortcut hint -- if you highlight text you want to indent , then pres 'ctrl'-'right-bracket' -- you can indent a whole block at once.

Also, you will want to add a colon after the function: as in main():

Hope that works.

Thank you very much