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Python

Posted by Juan Perez
Juan Perez
Courses Plus Student 8,944 Points

I Get an Traceback error

I get a Traceback error. What could be causing this error? This is my code

# make a list that will hold onto our items
shopping_list = []

# 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.")

while True:
    # ask for new items
    new_item = input(">  ")

    # be able to quit the app
    if new_item == "DONE":
        break


# add new items to our list
    shopping_list.append(new_item)


# print out the list
print("Here is your list:")

for item in shopping_list:
    print(item)

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

apples Traceback (most recent call last): File "shoppinglist.py", line 10, in <module> new_item = input("> ") File "<string>", line 1, in <module> NameError: name 'apples' is not defined

2 Answers

Iain Simmons
Iain Simmons
Treehouse Moderator 32,305 Points

So first up, it's not a traceback error, it's a NameError. The traceback is just output from the error so you can 'trace back' to where the error originated.

As for the actual error, this comes from using Python version 2.x instead of 3.x. input in Python 2 treats the response to the prompt to the user as an actual Python expression, instead of a string.

Treehouse courses all use Python 3 syntax, but if you want to use Python 2, use the raw_input function instead of input.

Juan Perez
PLUS
Juan Perez
Courses Plus Student 8,944 Points
Juan Perez
Juan Perez
Courses Plus Student 8,944 Points

Thanks Both!