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Python Python Basics (2015) Shopping List App Refactor

Sergio Niño
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.a{fill-rule:evenodd;}techdegree
Sergio Niño
Full Stack JavaScript Techdegree Student 22,976 Points

My answer is getting a "Bummer!

Challenge Task 1 of 1

This challenge is a little different. You shouldn't have to write very much code. You probably recognize this code. It's pretty much our shopping_list_2.py from before. I want you to help me with a little refactor, though. Refactoring is when we change code to make it better, often by creating new functions. 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.

My answer:

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

Carlos Federico Puebla Larregle
Carlos Federico Puebla Larregle
21,074 Points

You have to indent everything that is going to be inside the newly created function.

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)

I hope that helps a little bit

Sergio Niño
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.a{fill-rule:evenodd;}techdegree
Sergio Niño
Full Stack JavaScript Techdegree Student 22,976 Points

Thankss Fede!!! Now I remember when Kenneth spoke about "Indentation" is probably the biggest problem for new Python developers.