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Python Python Basics (2015) Shopping List App Refactor

Victoria May
Victoria May
517 Points
Posted by Victoria May
Victoria May
517 Points

Shopping_list_2.py I have no idea what I'm doing wrong.

I have indented, un-indented checked my syntax, I just don't know what i'm doing wrong.

It's probably syntax. It's always syntax.

Please help.

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)

3 Answers

Jordan Chesley
Jordan Chesley
2,910 Points
Jordan Chesley
Jordan Chesley
2,910 Points

I managed to fix your code by fixing the indentation in your main function.

There are 3 indentation errors in this small section of code.

         if new_item == 'DONE':
            break
        elif new_item == 'HELP':
            show_help()
             continue
        elif new_item == 'SHOW':
            show_list(shopping_list)
             continue

You have an extra space before your if statement when compared to the elif statements, and an extra space before each of your continues.

Jonathan Beard
Jonathan Beard
1,681 Points
Jonathan Beard
Jonathan Beard
1,681 Points

It looks like your list is in the main function, I would take it out and put it at the top of the file. I posted the below so you an see how I did it, hopefully it helps.

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

# print out instructions on how to use the app
def show_help():
        print("What should we pick up at the store?")
        print("""
Enter 'DONE' to stop adding items.
Enter 'HELP' for help.
Enter 'SHOW' to see your current list
                """)
def show_list():
        print("Here is 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("Adding {}. List has {} items.".format(new_item, len(shopping_list)))

show_help()

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

        if new_item == 'DONE':
                break
        elif new_item == 'HELP':
                show_help()
                continue
        elif new_item == 'SHOW':
                show_list()
                continue
        add_to_list(new_item)

show_list()
Victoria May
Victoria May
517 Points
Victoria May
Victoria May
517 Points

I did that, but still received the Bummer error. I'm not to sure what's wrong