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Python Python Basics (2015) Shopping List App Refactor

Posted by Yamil perez
Yamil perez
Courses Plus Student 561 Points

i need help

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 main():
    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

         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

Ari Misha
Ari Misha
19,323 Points
Ari Misha
Ari Misha
19,323 Points

Hiya Yamil! All you have to do is refactor a little. You dont have to change any code or something, you just have to put everything from line 22 and below , in a function called "main". This might help ya.

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)
Yamil perez
PLUS
Yamil perez
Courses Plus Student 561 Points
Yamil perez
Yamil perez
Courses Plus Student 561 Points

thanks, now i got it.