there is no value for '' in your dict1
Again, the tests are ok, think about how you give change when they pay you with a 100 dollars bill (there are two ways, you're using the wrong one when you can use the other).
Both tests are ok, you're giving back the change wrong.
NO NEED TO SCREAM LIKE THAT!...
it's in your code, debug it by reading the full error message: it even tells you where the problem is and what it is.
edit: oh, wait, seems I'm not awake enough. Lemme take a look. edit²: ok, I'm effectively not awake enough, but it is in your code.
Loading collection data...
there is no value for '' in your dict1
Again, the tests are ok, think about how you give change when they pay you with a 100 dollars bill (there are two ways, you're using the wrong one when you can use the other).
Both tests are ok, you're giving back the change wrong.
NO NEED TO SCREAM LIKE THAT!...
it's in your code, debug it by reading the full error message: it even tells you where the problem is and what it is.
edit: oh, wait, seems I'm not awake enough. Lemme take a look.
edit²: ok, I'm effectively not awake enough, but it is in your code.