FAQ: Learn Python: A Day at the Supermarket - Keeping Track of the Produce

This community-built FAQ covers the “Keeping Track of the Produce” exercise in Codecademy’s lessons on Python.

FAQs for the Codecademy Python exercise Keeping Track of the Produce:

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2 posts were split to a new topic: What does %s and % do

2 posts were split to a new topic: Dictionary order

3 posts were split to a new topic: How Does This Work?

2 posts were split to a new topic: Why don’t we need to wrap stock[key] or prices[key] in str()?

2 posts were split to a new topic: Am getting an error about the the “Orange key”

7 posts were merged into an existing topic: My code prints the item, price, and stock - why isn’t it accepted?

4 posts were split to a new topic: Where did the food variable come from?

Why is my answer not accepted if I use %d instead of %s even the output appears to be the same?
Shouldn’t %d be used whenever we are dealing with numbers?

Appears or is?
Is that the only difference?
Does it pass/not pass as a result of only changing that?
If it’s an integer then the default string representation is already the same as %d so should is probably too strong of a word. %s doesn’t mean that the value is a string, it’s saying to use default string conversion.

I don’t understand what you mean here. Can you elaborate please?

That looks like a pretty complete and non-cryptic statement as it is, can’t guess what you’re missing about it, you’d have to describe what you’re wondering. Explaining more and better isn’t really… so great.

I need an explanation on how the loop was able to match the key with the two key:values correctly in the printed console? I even reshuffled the keys in my dictionaries, and the loop was still able to print out the right prices/stock with the correct keys

price: 1.5
stock: 32
price: 3
stock: 15
price: 4
stock: 6
price: 2
stock: 0

In Python 2, dictionaries are unordered. We access the values by polling the key.

price['orange']    =>  1.5
stock['orange']    =>  32
1 Like