try this :
model=raw_input("What kind of car do you drive?")
gallons=raw_input("How many gallons have you driven?")
number1 = float (gallons)
miles=raw_input("How many miles have you driven?")
number2 = float (miles)
try:
number1 = float (gallons)
number2 = float (miles)
except ValueError:
print "some values are wrong type."
else:
print "Your average number of miles to gallons is",
print number1 / number2
On Wed, Apr 27, 2011 at 5:11 PM, Noah Hall <enali...@gmail.com> wrote:
> On Wed, Apr 27, 2011 at 9:17 PM, Johnson Tran <aznj...@me.com> wrote:
>> Thanks for the reply Alan and Noah, I really appreciate the help. I am
>> really trying to understand this although still cannot seem to grasp it all.
>> I have modified my program although now it seems to be giving me the wrong
>> answer with the correct answer when I input any value.
>>
>> I have program:
>>
>> model=raw_input("What kind of car do you drive?")
>> gallons=raw_input("How many gallons have you driven?")
>> number1 = float (gallons)
>> miles=raw_input("How many miles have you driven?")
>> number2 = float (miles)
>>
>>
>> try:
>> model=float(model)
>> except ValueError:
>> print "I cannot compute your total miles to gallon with those values."
>> else:
>> print "Your average number of miles to gallons is",
>> print number1 / number2
>>
>> Output:
>>
>> What kind of car do you drive?fire
>> How many gallons have you driven?10
>> How many miles have you driven?5
>> I cannot compute your total miles to gallon with those values.
>
> Again, it's because you're "validating" the wrong variable. model is
> _not_ what you want to validate - it needs to be a string! gallons and
> miles are what you want to validate. So try moving your try: except:
> somewhere else, where it will validate the gallons and miles.
> _______________________________________________
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
_______________________________________________
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
