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Python Python Basics (2015) Shopping List App Refactor

Loh Pin Hua
Loh Pin Hua
3,160 Points
Posted by Loh Pin Hua
Loh Pin Hua
3,160 Points

problem

What am I doing wrong here?

def main():
  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)
  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

1 Answer

Nathan Tallack
Nathan Tallack
22,160 Points
Nathan Tallack
Nathan Tallack
22,160 Points

What they wanted you to do is get the code that was not inside a function and put it inside the main function.

So from line 22 down (where show_help is called) you should indent the code then just above it declare the main function with no parameters.

Your code should then look like this.

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)