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

Posted by ibrahim Warsame
ibrahim Warsame
7,803 Points

Getting many errors in my code,like"Traceback (most recent call last):"

Can anyone help me to debug this program? and please tell me the logic behind this code.

    shopping_list = {}


def show_help():
  print("\nseprate each iteam with a comma")
  print("Type SHOW to show your current list, type DONE when you are finished and HELP to show this \n massage")


def show_list():
  for item in shopping_list:
    count = 1
    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("\nheres 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 certen spot: press enter for the end of the list"
                 "or give 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, new_list.strip())
        spot += 1
  else:

    for item in new_list:
      shopping_list.append(item.strip())

      ```

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 67,989 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 67,989 Points

Ignoring the PEP-8 styling issues, I found 4 errors in your code. See annotated code below:

shopping_list = []  # <-- #1 changed to list instead of dictionary

def show_help():
  print("\nseprate each iteam with a comma")
  print("Type SHOW to show your current list, type DONE when you are finished and HELP to show this \n massage")

def show_list():
  count = 1  # <-- #2 moved count init outside of loop
  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("\nheres your list")
    show_list()
    break
  elif new_stuff == "HELP":
    show_help()
    continue
  elif new_stuff == "SHOW":
    show_list()  # <-- #3 added missing parens
    continue
  else:
    new_list = new_stuff.split(",")
    index = input("Add this at a certen spot: press enter for the end of the list"
                 "or give 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())  # <-- #4 strip item instead of new_list
        spot += 1
  else:

    for item in new_list:
      shopping_list.append(item.strip())