[Tutor] Use __str__ method for int values

[Jason Friedman]

> I am trying to use a __str__ method to display the values of attribute mood
> = self.hunger + self. boredom.
> When I try to execute I get this error:
>
> Traceback (most recent call last):
>   File "C:/Users/Vincent/Documents/Programming Tutorials/Python Programming
> for the Absolute Beginner - Project
> Files/source/chapter08/critter_caretaker_vpb3.py", line 105, in <module>
>     main()
>   File "C:/Users/Vincent/Documents/Programming Tutorials/Python Programming
> for the Absolute Beginner - Project
> Files/source/chapter08/critter_caretaker_vpb3.py", line 99, in main
>     print(crit)
> TypeError: __str__ returned non-string (type int)

>     def __str__(self):
>         mood = self.boredom + self.hunger
>         return mood

I believe the problem is that your __str__ method returns an int
rather than a string.

Try:
mood = str(self.boredom + self.hunger)