I really have no idea what could be wrong with this. def hours(): return "We're open from {} to {}.".format(open,c

Two things you're going to need to do is, firstly, you need to pass in "self" as an argument to the hours(): method.

Also, the reason why it's not working is becasue you need to use self.open and self.close in order to reference the attributes of the class.

class Store():
    close = 10
    open = 9

    def hours(self):
        return "We are open {} to {}".format(self.open, self.close)

That should do the trick. The reason why you pass in self as an arguemtn is becasue, essentially, you're calling a function when you call "hours()". Since you're calling a function, you need to be pass in the instance of the object you've created (in this instance, Store) so that way you can reference said objects attributes (In this case, open and close).

Essentially, when you pass in self and you type in "self.close" what you are doing is basically saying "Store.close", you are getting the attribute of the passed in object, which is the object that the method is wrapped around

class Store():
    close = 10
    open = 9

Is around:

    def hours(self):
        return "We are open {} to {}".format(self.open, self.close)

So, anytime you pass in "self" as an argument, you're essentially passing in the class to that method so it can use it's attributes and other methods.

Hope that helps!