Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Python Collections (Retired) Lists Redux Shopping List Take Three

Philip Salmon
seal-mask
.a{fill-rule:evenodd;}techdegree
Philip Salmon
Python Web Development Techdegree Student 267 Points
Posted by Philip Salmon
.a{fill-rule:evenodd;}techdegree
Philip Salmon
Python Web Development Techdegree Student 267 Points

Code did not work...

shopping_list = []

def show_help(): print("\nSeparate each item with a comma.") print("Type DONE to quit, SHOW to see the current list, and HELP to get this message.")

def show_list(): count = 1 for item in shopping_list: print("{}: {}".format(count, item)) count += 1

print("Give me a list of things you want to shop for.") show_help()

while True: new_stuff = input("> ")

if new_stuff == "DONE": print("\nHere's your list:") show_list() break elif new_stuff == "HELP": show_help() continue elif new_stuff == "SHOW": show_list() continue else: new_list = new_stuff.split(",") index = input("Add this at a certain spot? Press enter for the end of the list, " "or give me a number. Currently {} items in the list.".format( len(shopping_list))) if index: spot = int(index) - 1 for item in new_list: shopping_list.insert(spot, item.strip()) spot += 1 else: for item in new_list: shopping_list.append(item.strip())

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

It has to be an indentation error somewhere. Because if I take your code, and simply format it with the correct indentation, it compiles and runs. I've even added things to the list in different places without problem. Here's the code with the correct indentation:

shopping_list = []

def show_help(): 
  print("\nSeparate each item with a comma.") 
  print("Type DONE to quit, SHOW to see the current list, and HELP to get this message.")

def show_list(): 
  count = 1 
  for item in shopping_list: 
    print("{}: {}".format(count, item)) 
    count += 1

print("Give me a list of things you want to shop for.") 
show_help()

while True: 
  new_stuff = input("> ")
  if new_stuff == "DONE": 
    print("\nHere's your list:") 
    show_list() 
    break 
  elif new_stuff == "HELP": 
    show_help() 
    continue 
  elif new_stuff == "SHOW": 
    show_list() 
    continue 
  else: 
    new_list = new_stuff.split(",") 
    index = input("Add this at a certain spot? Press enter for the end of the list, " "or give me a number. Currently {} items in the list.".format( len(shopping_list))) 
    if index: 
      spot = int(index) - 1 
      for item in new_list: 
        shopping_list.insert(spot, item.strip())
        spot += 1 
    else: 
      for item in new_list: 
        shopping_list.append(item.strip())

Hope this helps! :smiley: