Inheritance/Polymorphism in Object Oriented Programming | Python for Beginners | Code with Kylie #10
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- Опубліковано 18 вер 2024
- We are LEVELING UP our object oriented programming. Once you start creating objects in Python using classes, you can step up your OOP game by incorporating inheritance and polymorphism!
Inheritance is when you can create child classes that inherit attributes and functions from the parent. These are often used when you have a more general overarching class but want to define more specific classes that may be similar but not quite the same. We do this in order to avoid copy-and-pasting a gazillion times.
In this video, we use dogs as an example of how inheritance can be used. I demonstrate how to create a parent class (superclass) and child class (subclass), and initialize both of them.
We can also have multiple inheritance, which is when a subclass can have multiple parents and inherits the unique functions and attributes of both of them. An example is a golden doodle!
Polymorphism is related to inheritance. Polymorphism means taking many forms. In OOP, this is often related to subclasses that override the parent method so that the more specific class might follow a different set of instructions. In my example, I use different barks of different breeds of doggos.
In practical terms, I've used this in past projects to account for the slight differences in the subclasses. For example, if we are calculating cost of an object, maybe one subclass is set in the US, and another class is specific to France.. we would use the subclass to change from dollars to euros in the France subclass and add an extra layer. We could do this with if-statements, but they might grow repetitive and confusing. Polymorphism is a cleaner way to implement something like this.
Relevant links for more:
thepythonguru....
Inheritance vs polymorphism - www.geeksforge...
Feel free to leave any questions.
Please consider subscribing if you liked this video: www.youtube.co...
Thanks for watching everyone!
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Thanks for watching :)
Some good additional resources if you want to read more!
thepythonguru.com/python-inheritance-and-polymorphism/
www.geeksforgeeks.org/difference-between-inheritance-and-polymorphism/
Follow me on Twitter and Instagram: @kylieyying
Thanks kylie!’ So whats next?
Good question.. I have a couple of directions - I want to do more tutorials and stuff, seems like most people want to see those. I also want to start talking about my research, make some videos that are less educational and more just about what you can do with CS. I want to inspire others!
Kylie Ying sounds great! Would love to hear more about your research
I like it when you say "Arf arf!"
Even my trainer was not able to make us understand that in 2 days, What you did in approx. 12 minutes.
You have some serious skills!!
Best of luck for future!!!! :)
Who in the world would dislike this video? She is amazing and used doggies for the example.
People who dislike this video are cute dog haters :)
Yeah, I like doggy stuff as well, if you know what I mean)
@@user-em5ep9zw4z Now I don’t see it the same way lmao
Yeah.She's also cute. I want a programmer gf☺
@@FrancisCo-xk6rv oop
Good job Kylie!
Note:
You don't need to cal the parent class's __init__ from the child class's __init__ if the child doesn't introduce any new attributes
I have been through a full stack developer bootcamp, and months of self-study. After watching this video, I finally feel like I REALLY understand Inheritance and Polymorphism. Great examples! Thank you!
This video was EXACTLY what I was looking for when trying to practice these concepts. Thank you so much
Best Example I have ever come across and I wish everybody to use Doggo examples 💖
Clear, concise, pacey video and so helpful on these core concepts of OOP - deserves MANY more views! Thank you!
I found Polymorphism a difficult concept to understand but after watching this video, I understood it perfectly well. Thnx for uploading great free content
Nice!
hey man
you also having doupt in opps ............ omg💥💣
i am one of your subscriber and fan of your coding skills 😍
whoaa. ur so good at explaining everything in just a span of minutes. thank u so much. more videos like this, please
I’m learning abit of python everyday and I’m really loving your videos! Super easy to understand and well explained!!
Thank you soo much!! 🙏
It's the third time that I come back to this video to brush up on my knowledge of Python inheritance! Thanks for this amazing video.
Was looking for someone who could explain this in a simple way, and found you after multiple trials of other sources. You just won a student, and I consider myself the privileged one here. Thanks a bunch.
very clear video that allowed an old French man like me to finally understand polymorphism . Merci !
OMG this is like the best video in explaining inheritance and polymorphism. So basically for inheritance you just include the name of parent class in the bracket of the subclass, then for polymorphism is just the idea of defining a method that's already present in the parent class but with different content.
I was confused between the two but now I know the difference, thanks!
SUPER NICE KYLIE!!
Thank you so much, you explained this in a super easy to understand way!
Great work Kylie. Your Python series is well explained and the examples you use make your videos more interesting.
Thanks for sharing the knowledge. It will now be a stepping stone for me. thanks a lot once again
This video is exactly what I was looking for! You explain the concepts so clearly and using doggos really helps me to understand 🤣 thank you!
The best explanation I've got on these subjects
This is a fantastic video with a very simple and straight forward example - keep up the good work!
Thank you Kylie for such clear explaination using cute examples :)
Great video, thank you so much! I was completely tripped up on the connection between a sub __init__ and super().__init__ and it makes complete sense now. Also I love the dog examples!
I wish all programming videos on UA-cam were this quality
Thanks Kylie I am really enjoying your pet programming
print("Thank you. You made it very clear with examples and I now understand the concept.")
damnn this video was 100x better than I had thought it would be. Deserved a like for sure. Thanks!
Thank you so much! Kylie!!! your examples on dog are wonderful!!
THANK YOU. Like the tone and pace of your voice. Easy to digest. Very precise and succinct as well. Subbed. ✌️
thanks queen love the dog examples
Your explanation of each of these topics was extremely clear and easy to understand! Excellent work. Also love the doggos
I really like how you explained everything... keep up the great work, and keep teaching! I like your format quite a lot. :)
best tutorial, loved the doggo examples thnx
You explain wonderfully! Thanks!
Multiple videos watched on this topic and still couldn't understand because of all the jargon they used. Good video and thanks
Most simple explanation of Polymorfism I've seen so far :) Better than with build in dunder method usual examples.
Glad it helped! Actually I gave a bad example I think. Usually when a child class has two parent classes, you dont want the "grandparent" class to be the same. Probably shouldve made a "Pet" class or something
Best example!! Thank you!
These were awesome watched all within a few days!
I like her cute little ponytail!!
Kylie, these videos are so good. They have really helped me a lot.
Very good explanation..keep it up
Excellent use of simple examples to explain inheritance and polymorphism :)
Thankyou so much kylie.. ❤🧚♀️for the wonderful explanation
So much clear explanation...
We expect more videos like this...
Awesome lesson! Very clearly explained. Thank you so much!
Thank you for your great tutorial video... Please create more python tutorials for beginner...
keep uploading more videos.absolutely amazing.keep up the good work
Amazing , glad that I found it . Good job and thank you
Thanks very much, explained much better than my uni!
Seeing the word 'doggo' used in your variable name made me scroll down from the video just to hit the like button. Also, thanks for explaining the concepts clearly!
Great video.
thankyou so much kylie
Thanks love this was really helpful
Kylie you're super amazing 💪😊
thank you so much! much easier to understand than my prof
Thank you, you are really good at explaining and your examples are super helpful!!
This was so cute. I love it. In my class, we kept using cats but I'm a dog person. lol
You deserve a credit for those amazing videos :D Thanks so much
Thank you Mulan!
This video was execellent
Thanks for your excellent explanation!
Thank you for this great video! Helped me a lot.
Thanks for the video, you explained it really well. I am trying to get my head around OOP, this sure did help. The only issue I can say is that you didn't mention a pug 🤣😝
Thank you so much ♥️♥️♥️♥️ you're the best
I really like your teaching although it took me twenty years of teaching to understand that not all students are as smart as you think and see the world, I mean other videos, they are great, really is helping me , but the first time I was not ready and somehow intimidated , and there is nothing in the world for me that I can't understand so I learned more and get back and we squerd
Thank you so much!!
that was clear!
Very late comment but this video is absolutely amazing. Concise explanation given in an easy to digest manner. Thank you very much.
Thank you!
Wonderful explanation!
great video Kylie - so helpful
How can I like this video more than one time?🧠
will you make more videos? I am eagerly waiting. You are so articulate and very good speaker with clarity in voice.
thank you sooo soo much! you explain it so easily and in an interesting way.
Love you ❤
Seriously, best explanation ever :)
10 out of 10
Wow! Thank you very much! That was a mater class @Kylie Ying
Omg! Watching make sense in seconds where if I'd just continue reading it on code cademy then it'll take 5x longer and even that I'd probably would still be confused 😅
same lol
code academy's written explanation was garbage
you saved me! thank you so much 💓
Thanks for the vid Kylie!
Thank you
Subscribed!
Amazing. It really helps
thank you i really needed a refresh
Woof woof i like this tutorial ........................
Nice content!
Hi Kylie, great videos!
I just had a question:
in the parent class, this line is def __init__(self, name, age, friendliness)
but when we call the parent class in the child class, it's super().__init__(name, age, friendliness).
Is there a reason that there's no 'self' in the child class line as there is in the equivalent parent class line? Or is that just the way that it has to be written to work? Thanks!
You only need the self for initializing the class. And that was already done on the init method. The super is just for calling the previous definitions from the parent class
@@buscapee ah thanks very much Mané!
How cool is that.!!?
NO, mam.... I would rather say, "How cool your explanation is!!".
Great tutorial!
great video, thank you!
you are gret, Appreciate that but
please discuss the difference b/n function and Class in brief.....
Sorry if this is a bit of a dumb question; is it possible to inherit some information but not all? let’s say the Poodle has shed_value = 0 but the Golden Retriever has a shed_value = 5.
is there a way to make the Golden doodle class to inherit JUST the 0 value or the 5?
you didn't need to copy the def __init__ for all child classes right? Inheritance sorts that out if you don't re-define it no? Or was there something in the super() that made it different?
I'm brand new to python btw
Thanks Kylie. 7:17 The super() in GoldenDoodle refers to which parent class?
All of them! Check this out :')
class Parent:
def __init__(self):
print('Init parent')
class Child1(Parent):
def __init__(self):
super().__init__()
print('Init child1')
class Child2(Parent):
def __init__(self):
super().__init__()
print('Init child2')
class GrandChild(Child1, Child2):
def __init__(self):
super().__init__()
print('Init grandchild')
GrandChild()
This prints:
"Init parent
Init child2
Init child1
Init grandchild"
@Kylie Ying Why not make "Dog" an abstract class?
Thanks for great explanation. U deserve more subs :D
说得真不错