I am trying to write a program that collects gas receipt information. I only want it to ask one time for how many receipts there are and then I want it go ask the loop of questions.

How do I do this? I'm guessing I can't declare multiple variables in the beginning? We did not learn much in my class, so I'm trying to go above and beyond and do a little more for our project to get the program where/how I want it.

Here is my starting off code:

#the main function
def main():
    milesObtained = getMiles() #call to get the miles obtained
    totalPrice, totalGallons = getInput() #calls to collect total prices paid
    printReport(milesObtained, totalPrice, totalGallons) #call to print the full report out
    
#collects miles obtained during the month
def getMiles():
    milesStarted = input('Enter the starting miles: ')
    milesEnded = input('Enter the ending miles: ')
    milesObtained = milesEnded - milesStarted
    return milesObtained

#collects receipt data
def getInput():
    totalPrice = 0
    totalGallons = 0
    number = input('How many receipts do you have to enter? ')
    for counter in range (0, number):
        price = input('Enter the price: ')
        gallons = input('Enter the gallon amount: ')
        totalGallons = totalGallons + gallons
        totalPrice = totalPrice + price
    return totalPrice
    return totalGallons
        
#prints out the report
def printReport(milesObtained, totalPrice, totalGallons):
    print 
    print '----------------------------'
    print 'RESULTS OF GAS THIS MONTH'
    print '----------------------------'
    print 'The miles obtained were: ', milesObtained
    print 'The total price paid this month is: ', totalPrice
    print 'The total amount of gallons this month is: ', totalGallons

#calls main
main()

When I run the code, it does this:

IDLE 1.2.2      ==== No Subprocess ====
>>> 
Enter the starting miles: 105000
Enter the ending miles: 107000
How many receipts do you have to enter? 2
Enter the price: 10.00
Enter the gallon amount: 2
Enter the price: 10.00
Enter the gallon amount: 2
Traceback (most recent call last):
  File "C:\Users\fmcgovern\Documents\School Work\Programming\ProjectTest.py", line 38, in <module>
    main()
  File "C:\Users\fmcgovern\Documents\School Work\Programming\ProjectTest.py", line 4, in main
    totalPrice, totalGallons = getInput() #calls to collect total prices paid
TypeError: 'float' object is not iterable
>>>

Edited 5 Years Ago by LagunaGTO: n/a

Just a a quick look. Read the comments ...

#the main function
def main():
    milesObtained = getMiles() #call to get the miles obtained
    # expect the return of one totalPrice, totalGallons tuple
    totalPrice, totalGallons = getInput() #calls to collect total prices paid
    printReport(milesObtained, totalPrice, totalGallons) #call to print the full report out
    
#collects miles obtained during the month
def getMiles():
    milesStarted = input('Enter the starting miles: ')
    milesEnded = input('Enter the ending miles: ')
    milesObtained = milesEnded - milesStarted
    return milesObtained

#collects receipt data
def getInput():
    totalPrice = 0
    totalGallons = 0
    number = input('How many receipts do you have to enter? ')
    for counter in range (0, number):
        price = input('Enter the price: ')
        gallons = input('Enter the gallon amount: ')
        totalGallons = totalGallons + gallons
        totalPrice = totalPrice + price
    # return one totalPrice, totalGallons tuple
    return totalPrice, totalGallons
        
#prints out the report
def printReport(milesObtained, totalPrice, totalGallons):
    print 
    print '----------------------------'
    print 'RESULTS OF GAS THIS MONTH'
    print '----------------------------'
    print 'The miles obtained were: ', milesObtained
    print 'The total price paid this month is: ', totalPrice
    print 'The total amount of gallons this month is: ', totalGallons

#calls main
main()

I'm not sure I get what you're stating in the comments? If I put what you added and remove the comments, it gives me a syntax error. If you show me what the code should be, I will be able to understand. I just don't think we've learned this much and are not going to, so my knowledge is short on coming up with the answer.

Can you give us the content of your error message?

totalPrice, totalGallons or (totalPrice, totalGallons) is a tuple
your function has to return that to match the function call result

Edited 5 Years Ago by vegaseat: n/a

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