[Tutor] Need help with dict.calculation

[Eve Kotyk]

Hi Andy..and the rest of you.

Thank you for your suggestions.  
> #
> def gather_data():
>   items = raw_input("Add food item: ")
>   portion = input("Enter number of portions: ")
>   cal_portion = input("Enter calories per portion: ")
>   return items,portion,cal_portion
> 
> def get_total_calories():
>   print "Enter all foods you have eaten today."
> 
>   more=""
>   while more!="n":
>     items,portion,cal_portion = gather_data()
>     total_calories[items]=portion * cal_portion
>     more = raw_input("Do you want to continue? y/n: ")
> 
>   for i in total_calories.values():
>     total = total + i
>   print "Total calories: ",total

This part still doesn't work for me.  I get the following error:

Traceback (innermost last):
  File "bmi2.py", line 47, in ?
    get_total_calories()
  File "bmi2.py", line 33, in get_total_calories
    total_calories [items] = portion * cal_portion
NameError: total_calories 

> #
> 
> As a side note, you don't even need to put it in a dictionary, you can just
> have a running total in an integer variable.
> I said I wouldn't make drastic changes though :o)

Andy I appreciate your not making drastic changes because this is a
learning project.  But now that I understand dictionaries just a bit
better (and I still haven't figured out how to add up the subtotals for
each item in a total overall).  I'd really appreciate a lesson how to
have a running total in an integer variable.

E
> 
> Andy
> 
> >
> > def food_add():
> >     print "Enter all foods you have eaten today."
> >
> >     items = raw_input("Add Food Item: ")
> >     portion = input("Enter number of portions: ")
> >     cal_portion = input("Enter calories per portion: ")
> >
> >     more = raw_input("Do you wish to continue? y/n: ")
> >     while more != 'n':
> >         food_add()
> >         break
> >     total_calories[items] = portion * cal_portion
> >     total = 0
> >     for i in total_calories.values():
> >         total = total + i
> >     print "Total calories: ",total
> >
> > My output is:
> >
> > Total calories:  120
> > Total calories:  254
> >
> > The total calories for each item entered with the last entry first,
> > rather than just a Total calories: 374
> > --
> >
> > ekotyk
> >
> > http://members.shaw.ca/e.kotyk/virtualstudio.htm
> >
> > _______________________________________________
> > Tutor maillist  -  Tutor@python.org
> > http://mail.python.org/mailman/listinfo/tutor
> >

-- 

ekotyk

http://members.shaw.ca/e.kotyk/virtualstudio.htm