Question

Ok, so I have this class that’s supposed to have food, hunger, and some other attributes.

I have just a definition like this:

def setfood():
     choice = input("Choice: ")
     if choice == "1":
           food = 1
           bored = 2
     if choice == "2":
           food = 4
           bored = 8
     return food
     return bored

And then I have this class like this.

class thing(object):
    def __init__(self, name, hunger = 0, boredom = 0):
        self.name = name
        self.hunger = hunger
        self.boredom = boredom

    def eat(self):
       setfood()
       self.hunger -= food
       self.boredom += bored

Well, no matter what I do, I can’t get it to work. I kept getting this error about a global variable.

Well, I add in food = 0 and bored = 0 into the main part of the program and it makes no difference because I can’t pass the global variables into the definition.

I tried to add the definition into my class and it still made no difference. I also tried to make separate definitions to return each variables…also didn’t work. No matter what I do, I can’t win.

The only way I can get it to work is if I do this:

food = setfood()

I thought I could maybe change it to this:

food = setfood(food)
food = setfood(bored)

But that doesn’t work either…

But, if I do that for both variables, I have to go through the whole thing twice. So what exactly do I do? I’m so lost and frustrated.

Answer 1

“NameError: global name ‘food’ is not defined”

food in your function is only defined when you enter one of the if blocks. Are you entering input other than 1 or 2? If os food won’t be defined to anything. You could have a default value for food like:

food = 0 # food stays at 0 for invalid choices
choice = input("Choice: ")
if choice == "1":
     food = 1
     bored = 2
if choice == "2":
     food = 4
     bored = 8
return food

Also to return two variables your return statements need to return a tuple, ie

 return (food, bored)

then the caller can do

 (food, bored) = setfood()

and you’ll be able to return two values at once as you intend