add_item

Hey hey Jeffery,

The concept of inheritance is very important and you should probably do some follow up searches on it and go through the video again until it makes sense. No use to moving on until you got this .

In task 1 you created a sub class of Inventory

class Inventory:
    def __init__(self):
        self.slots = []

    def add_item(self, item):
        self.slots.append(item)

# specify a class in the parenthesis and you have a subclass
class SortedInventory(Inventory):
    pass

The SortedInventory class at this point is the exact same as Inventory - because - it inherited everything from Inventory, which is two methods one called __init__() and one called add_item().

Now we have the ability to add additional properties (variables) or methods (functions) to our subclass. We also have the ability to say. Hey I want to do something different with one of the two methods inherited from Inventory - this is called overriding the method. All we need to do to override the method is to define in our subclass. Like you did with __init()__ and should of done with add_item(). When you override a method your subclass method is executed instead of the base class method.

Once you override the method, you might still want to execute the base class method in addition to executing your subclass features. This is where super() comes into play. Super calls the base class method. Hope that makes sense - just let me know

What it should look like is:

class Inventory:
    def __init__(self):
        self.slots = []

    def add_item(self, item):
        self.slots.append(item)

class SortedInventory(Inventory): 

    def add_item(self, item):  # override add_item
        super().add_item(item)  # call the Inventory add_item() method
        #  put SortedInventory specific code here

Does that make any sense?