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sepehr akbarzadeh
Python Web Development Techdegree Student 1,762 PointsI need to create subclass but that give an error, so i don't know why...
Also i need a clear understanding for super class. I didn't get a good idea of that.
Thank you
class Inventory:
def __init__(self):
self.slots = []
def add_item(self, item)
self.slots.append(item)
class SortedInventory(Inventory):
pass
2 Answers
Ari Misha
19,323 PointsSure thing! In simple words , you need "super()" when you need to call the reference to the super class. Lemme present ya a simple example:
class MyParentClass(object):
def __init__(self):
pass
class SubClass(MyParentClass):
def __init__(self):
super()
In the example above, class "SubClass" is extending the parent class "MyParentClass" , which in turn is extending "Object" class, which is built-in class in the python core. Class "SubClass" has an init method , which is pretty much overriding the init in the parent class "MyParentClass", and we called "super()". So yeah , super() in init of "SubClass" is referencing the init method of the parent class "MyParentClass" and when we'll initialize the init in "SubClass", super() will additionally run the init of the "MyParentClass". I hope it helped!
Regarding the challenge, your code should look like this:
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)
Ari Misha
19,323 PointsHiya Sepehr! I pasted your code in the editor and it gave me an error "Bummer! Try again", i think it must be indentation or something. I cant figure it out but your code seems to be alright. Try this:
class Inventory:
def __init__(self):
self.slots = []
def add_item(self, item):
self.slots.append(item)
class SortedInventory(Inventory):
pass
sepehr akbarzadeh
Python Web Development Techdegree Student 1,762 Pointsyeah, it just reset my challenge and did it again then passed it.
but i don't understand what is super class in inheritance and why we should use.. i get after this challenge an error again can you help me in this challenge?
sepehr akbarzadeh
Python Web Development Techdegree Student 1,762 Pointssepehr akbarzadeh
Python Web Development Techdegree Student 1,762 PointsThank you so much for explain so clear.