using print to follow python code

Question

i am having some trouble trying to follow the code in on-line learning but no response so i figured i'd google and ask here. what i am trying to accomplish is to print each counter and total for the loop to see and follow the logic: please let me know where i can type print total to see the loop in action.

shopping_list = ["banana", "orange", "apple"]

stock = { "banana": 6,
    "apple": 0,
    "orange": 32,
    "pear": 15
}

prices = { "banana": 4,
    "apple": 2,
    "orange": 1.5,
    "pear": 3
}

# Write your code below!
def compute_bill(food):
    total = 0
    for x in food:
        total+=prices[x]
    return total

wow, that was a ridiculously fast edit... i tried putting 'print total' before 'return total' but that didn't work. i tried printing it as a string, but i guess i need help figuring out how to print something within a function. — SYSzero
– SYSzero, Commented Dec 26, 2013 at 16:38
i would like to follow the total as the loop progresses, as well as x. when i print total outside of the function total has not been defined so it doesn't work. when i tried putting total= 0 outside of the function i received an error. — SYSzero
– SYSzero, Commented Dec 26, 2013 at 16:40

wheaties · Accepted Answer · 2013-12-26 16:46:36Z

2

You can put it right after the for expression:

 for x in food:
   total += prices[x]
   print(total)

make sure your print call is intended the same number of spaces as the total += as indentation is important in python.

answered Dec 26, 2013 at 16:46

wheaties

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2 Comments

SYSzero Over a year ago

thank you. i did this before and it said my total was too high. guess it's a limitation within the gui they provide. curious to see what numbers they were throwing but this definitely helps!

wheaties Over a year ago

@SYSzero what you mean the numbers were too high? Perhaps food is longer than it should be? Maybe whatever is handing you that iterable has a bug in it.

SYSzero · Accepted Answer · 2013-12-27 22:33:05Z

0

sorry guys, silly question.

reason why it wasn't printing anything was because i never called the function.

after typing print compute_bill(shopping_list) it worked!

answered Dec 27, 2013 at 22:33

SYSzero

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