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Python Python Basics (Retired) Shopping List Shopping List Project

Posted by Carly Gloge
Carly Gloge
429 Points

It doesn't print out "Added! List has xx items." after running the code with some items (Apples, bread, etc).

It doesn't print out "Added! List has xx items." after running the code with some items (Apples, bread, etc). Can anyone let me know what's wrong with my code? 

shopping_list = ()

print("What should we pick up at the store?")
print("Enter 'DONE' to stop adding items.")

while True:
  new_item = input("> ")

  if new_item == 'DONE':
    break

    shopping_list.append(new_item)
    print("Added! List has {} items.".format(len(shhopping_list)))
    continue

print("Here's your list:")

for item in shopping_list:
  print(item)

[MOD: added ```python code formatting -cf]

Tobias Mahnert
Tobias Mahnert
89,414 Points
Tobias Mahnert
Tobias Mahnert
89,414 Points

print("Added! List has {} items.".format(len(shhopping_list)))

did you see that shhopping list has two hh?

Carly Gloge
Carly Gloge
429 Points

Thank you Tobias! I didn't see hh in the shhopping list. Now I do:)

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

After reformatting your code, I noticed that the "Added!" print statement is indented too far making it part of the if new_item == 'DONE': code block. But since it's after the break statement, it will never execute.

Unindenting the shopping_list.append() statement, the print statement and the continue (which is redundant as the last statement in the loop and may be removed), the code will execute correctly, provided you correct the typo "shhopping_list" mentioned by Tobias.

Carly Gloge
Carly Gloge
429 Points

Thank you Chris! after unindenting the shopping_list.append() statement, I still get the following error in the console when I add a new item or when I type DONE.

Apples Traceback (most recent call last): File "shopping_list.py", line 12, in <module> shopping_list.append(new_item) AttributeError: 'tuple' object has no attribute 'append'

When I type DONE, I see the following sentence.

Here's your list:

Do you see what's wrong here? Thanks again!

Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

Sorry, one additional fix I forgot to mention. shopping_list should be initialized as an empty list using [ ] instead of an empty tuple using ( ). Here is your fully code:

shopping_list = []  # <-- initialize as list

print("What should we pick up at the store?")
print("Enter 'DONE' to stop adding items.")

while True:
  new_item = input("> ")

  if new_item == 'DONE':
    break

  shopping_list.append(new_item)  # <-- unindent to align with 'if'
  print("Added! List has {} items.".format(len(shopping_list)))
  continue  # <-- continue implied. Not needed if last statement in block.

print("Here's your list:")

for item in shopping_list:
  print(item)