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Python Python Basics (2015) Shopping List App Refactor

Jason Méndez Lara
Jason Méndez Lara
688 Points
Posted by Jason Méndez Lara
Jason Méndez Lara
688 Points

did somebody do this challenge ?

Create a new function named main that doesn't take any arguments.

Move everything from line 22 (show_help()) and below into your new function. You shouldn't have any code that isn't inside of a function.

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)

1 Answer

jacinator
jacinator
11,936 Points

This code passes the challenge. The only issue that I can see with your code is some indentation errors. Those will mess up the way that the code runs.

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)