Can't get Python class code to work
Question: I'm new to Python. Anyway, I was trying to make a 21 questions game, but my
code won't work.

The error is: `Name 'plux' is not defined.`

Here is the code:

    
    
    from random import randint
    
    
    class Game(object):
        num = randint(1, 3)
        def plux(x):
            x += 1
            return x
        def minu(x):
            x -= 1
        def iff(i):
            apple = 0
            num = randint(1, 3)
            if num == 1:
                x = input('Can you eat it? ').lower()
                if x == "yes" or "yeah":
                    print("test num 1")
                    apple = plux(apple)
    
            elif num == 2:
                print('test num 2')
            elif num == 3:
                print("test num 3")
    a = Game()
    print(a.iff())
    


Answer: When you call the function `plux` in the line `apple = plux(apple)`, add a
`self.` in front of the function call. In Python, `self.` is used as a
reference to the object itself that is used within the class scope (any place
inside of the `Game` class). In every function of a class, `self` has to be
the first parameter (this is something I don't know why we must do, I'm sure
there is a reason for it, but just follow this convention carefully).

