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Python Python Basics (2015) Shopping List App Refactor

Christopher Parke
Christopher Parke
21,978 Points

create a new function called main

Dont get what's wrong here.

def show_help():
    # print out instructions on how to use the app
    print("What should we pick up at the store?")
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:

def add_to_list(shopping_list, new_item):
    # add new items to our list
    print("Added {}. List now has {} items.".format(new_item, len(shopping_list)))
    return shopping_list

def main():

  # 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':
      elif new_item == 'HELP':
      elif new_item == 'SHOW':
      add_to_list(shopping_list, new_item)

2 Answers

Steven Parker
Steven Parker
230,235 Points

It looks like you moved that last line into the loop. It should be inside the function, but not indented so much as to be inside the loop.

Christopher Parke
Christopher Parke
21,978 Points

How does python know when my function is over? Feels weird without curly braces in the language.

Steven Parker
Steven Parker
230,235 Points

As you know, python relies on indentation.

:point_right: It knows your function has ended when it encounters a line that is is not indented, or the end of file.