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Python Object-Oriented Python Inheritance Super!

Help me out here on sorted list

Task 3 of 3 on inheritance super class the question about using list.sort method am failing to get the implied meaning

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

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

class SortedInventory(Inventory):

    def add_item(self, item):
        super().add_item(item)
        self.slots.append(item)
        list.sort(slots)

2 Answers

Jeff Muday
MOD
Jeff Muday
Treehouse Moderator 28,717 Points

Very close. The inheritance of the SortedInventory makes it so you can call the super().add_item() and that is sufficient to put the item into the slots. Then... all you have to do is sort, see below.

You could also get away with self.slots.sort(), but sorted() presents some interesting possibilities to change the sort method.

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

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


class SortedInventory(Inventory):
    def add_item(self, item):
        super().add_item(item) # this adds the item using the Parent class
        self.slots = sorted(self.slots)  # simple ascending sort of the slots
seth schwan
seth schwan
1,488 Points

Part 2 asks you to add items into the "slots" list. Which looks like this:


Inventory.py

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

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

class SortedInventory(Inventory):
    def add_item(self, item):
        super().add_item(item)
        self.slots.append(item)

In part 3, you actually have to replace the "self.slots.append(item)" with "self.slots.sort()". Rather than adding "self.slots.sort()" to the already existing code from the previous part of the challenge. It took me a while to figure this out. Hope that helps :)