Python OOP Tutorial 6: Property Decorators - Getters, Setters, and Deleters

In this Python Object-Oriented Tutorial, we will be learning about the property decorator. The property decorator allows us to define Class methods that we can access like attributes. This allows us to implement getters, setters, and deleters. Let's get started.
Python OOP 1 - Classes and Instances - • Python OOP Tutorial 1:...
Python OOP 2 - Class Variables - • Python OOP Tutorial 2:...
Python OOP 3 - Classmethods and Staticmethods - • Python OOP Tutorial 3:...
Python OOP 4 - Inheritance - • Python OOP Tutorial 4:...
Python OOP 5 - Special (Magic/Dunder) Methods - • Python OOP Tutorial 5:...
Python OOP 6 - Property Decorators - • Python OOP Tutorial 6:...
The code from this video can be found at:
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#Python

[@mariosconstantinou8271]

Even after 6 years, this series about OOP is amazing. Thank you Corey

[@yBazo82]

this helped me so much legit

[@Poerak]

Also suprised how accurate and applicable it still is. Really glad I spend the 3 hours learning this.

[@rijuroy7415]

@@Poerak Really it's amazing.

[@tejasvakhandelwal9951]

Really still this content taught me a lot

[@_theashishbhatt]

I agree. I first came across Corey in 2017, was just looking into python at that time but also liked the DIY stuff he did. BTW, @Coreyms with changes in python, has anything become outdated? I was planning to go through the entire playlist.

[@kevinzhang8974]

I watched this whole series (OOP) 3 times and code along with it. I have to say this is so far the best videos I have watched to explain Pyhon OOP. I learned some much from it ... Thanks you!

[@allinman4028]

Same here

[@uplift_therapy]

Yup!! Yup!!

[@TrungNguyen-ld7hz]

same here, in 2019.

[@alekhandrosuarez2832]

Same here! 2020. Thanks Corey! The reason peaple are watching this couple of time is that here you get extremely concentrated and straightforward understanding of OOP itself. Rather then just talking of syntax. The entire series is about an hour lonh, no rubbish, all clear, but there is so many usefull information, that a newbie just can't memorize all of that at once. So I use this series as a handbook. Thanks one more time!

[@alekhandrosuarez2832]

BTW for some reason I've been watching from different of my accounts and likes where coming from all of them. :)

[@danpickford3894]

If i can learn OOP at 2am in quarantine without the use of my singular brain cell then the explanation must be doing something right XD

[@Hsa008]

😄😂😂😁😀😅😅😆😆😆😉

[@srikarrepaka5023]

I am learning it at 4:50 am 😇😂😂

[@danpickford3894]

@@srikarrepaka5023 where you at my guy cos now i'm tryna learn a* at 2:10 am , us guys have no lives do we? edit: I just realised that I seem obsessed with coding at 2am, I have MANY problems and... apparently 2am is one of them...

[@wave8889]

I lean at 0:30 am and tomorrow is the exam xD

[@easyscience2235]

Exactly what I am doing right now, when the mind is clear xD

[@Skaxarrat]

Holy shit, in a bit of an hour I've understood concepts that would take hours to understand and fix the information in my brain. Thanks Corey P.D: You need to write a Python book

[@aidensmith6277]

I second this. I would buy it in a flash 😁

[@truphenalwanga9829]

yes and start a school too. In fact a chain of schools

[@yellowswordg]

I would buy it as well.

[@ashutoshagrawal3076]

Why don't open your own MIT

[@azekhuoriadignity2360]

I prefer videos to books

[@petenilson]

One of the clearest explanations of this that I've seen before. Thanks very much!

[@copyrightedchannel4939]

are you working to google now? 😄

[@5uperM]

For sure.

[@drygordspellweaver8761]

5 years ago - wish I had been studying python instead of following the trump election drama

[@obed818]

@@copyrightedchannel4939 lol ^^

[@akhilmachaan5010]

​@@copyrightedchannel4939 Can you explain why the email was not updated in the begginning.I didn't understand that part.

[@Given_A]

Watching in 2024 and still learnt alot. Thanks Mr Corey!

[@AmroKhalil-xo9tu]

It has been at least year since I have given up on OOP! This was exactly what I needed for such a long time.

[@ninakoch1799]

Thank you, thank you, thank you. Spent 13 weeks trying to learn the basics of oop at college, decided to start watching your series 3 days before my test and i think i finally truly understand the concepts, whereas before watching this i was pretty much just copying stuff from my lecture notes and didnt really understand why it did or didnt run properly. Corey, you are an incredibly gifted teacher and i feel blessed to be your student.

[@Schian]

I know it is a bit of a necro post. How did your test go?

[@aidensmith6277]

Other tutorials are so... bleh they just make you feel confused on the spot. Others make you feel like you understand because they don't tell you the whole story. You, sir, are neither. You are an awesome teacher. Thanks! 😅

[@christophermichaelrytting5465]

Property decorators are not that hard to explain, and you seem to be the only person on the internet who realizes that! Thanks much.

[@zihanchen4312]

If there is a Competition on the Internet to choose which is the best channel for Python Programming, I would vote for this channel with no hesitation. Huge Respect!

[@allinman4028]

I had no coding experience. I followed beginner series and OOP series and coded along with them with my little three kingdoms game concept. I feel I built great a solid fundamental understanding of Python. It will be extremely useful for my future coding journey. Thank you so much, Corey.

[@remzgr]

I am a non-programmer trying to learn Python and this series has been an absolute boon when compared to the other courses! Thankyou very much Corey!

[@jaspercheng8166]

I second this

[@akhilmachaan5010]

@@jaspercheng8166 Can you explain why the email was not updated in the begginning.

[@jaspercheng8166]

@@akhilmachaan5010 i cant, i quit learning python and went full crypto

[@jiakai7254]

@Akhil Machaan the email is an attribute that got initialized with the old first_name and last_name. To change the email, you would need to create a method that accesses the first and last names, but then all the existing code will have to be changed to access email like a method. the getter allowed us to define a method for email that can be accessed like an attribute so there's no need to change the existing code.

[@user-of5gk2cm9j]

Блин, круто объясняет! Из всего что он говорит, понимаю процентов 20, но всё понятно. Без воды, быстро, всё по теме! Спасибо!

[@hichamamchtkou7343]

Men, they should give you like a nobel prize about what you have done not only in this tutorial but in your KZbin channel , you're like superman for Python developers, thank you very much!

[@slimyelow]

Took me all morning coding and documenting along, but finally got my grip on this. Yay Corey !

[@CalvinJKu]

Best python channel ever. This decorator thing has troubled me for so long!

[@AhmedKhan-yw3wx]

I finally learned what property decorators are, thank you Corey!

[@imranayari]

After weeks of learning of OOP in python using other sources and I couldnt understand, now in 60 minutes plus, I was able to understand the concepts and logics behind OOP. Thanks Corey Schafer

[@dr_920]

Thank you so much for spending time on preparing the Class series. I've learned a ton from them.

[@milindsabnishd]

I couldn't understand 'Decorators' concept anywhere, but you made it so simple. Thanks a ton, Corey Sir.

[@MarshmallowIceCream]

I watch your videos. I have a new job. I love my new job. I love your videos.

[@alexisaddicted]

Unbelievable quality of this content, well done! Simple yet concise and to the point. Helped me a ton, thanks!

[@saitaro]

Glad I found your channel...

[@Pramesh37]

You're a life saver. Although I knew OOPS, I wanted to brush up to get my concepts clear. You explained concepts in such a way that I don't need to brush up on OOPS ever again! Thanks a ton.

[@abdelqadir5227]

Coming back to remind myself of python after a long break from coding. Very useful videos. Thanks

[@colinmanko7002]

Perfectly paced. Watched all 6 parts of ‘Working with Classes’ without needing to pause. Corey goes over concepts in a logical order and without fluff (as a good programmer would). I’ll be back!

[@peterchen5710]

Corey champ, you are unreal! I can't thank enough for the way you explain the concepts/designs, you dont just show me how things works, but you help me UNDERSTAND how things works. I will be sure to show my appreciation via Paypal once I get a dev job, thank you!

[@sreekanththota2200]

I just now compleated all ur OOP concepts,it took 2days for me......finally feeling happy......Tqs for osm explanation.....

[@esthers5201]

I went through about 5 videos trying to understand why we need property decorators....your video was the only one that explained it in a clear and concise manner!!

[@kavabangaungava]

This is a brilliant example of how to explain complex things in simple language!

[@JonathanHobbe]

Finally someone that explains it so you understand the logic behind it! Thanks so much!

[@dhananjay4525]

Bhaiya, bahut bahut dhanyawaad.....One of the best explanations on getters and setters in python across youtube

[@dileepbc5901]

thank you Mr Schafer for the tutorial i watched the whole series of OOP. next ill practice more

[@nissan5563]

I already watched your multiple videos including this OOP series and there is no doubt that I enjoyed it so much. Most appreciating point for me that, your neat and clean explanation without repeating or adding any unnecessary words. Please continue with more videos

[@dilpreetsinghnagra]

I have watched his almost every video related to python and believe me he explained to me clearly every concept that I wanted to study related to python

[@sebastianelsaca7872]

better than all my teachers in my university. Thanks

[@mrshyam538]

You are a great teacher... I have been following through all your playlists and i have learned a lot in so little time. Thank you so much whole heartily

[@daevski]

Bro, this is genius; I understood this example very clearly, and I was struggling to understand @property otherwise. Thanks so much for this awesome example!

[@taejimcap]

i watched the whole series and thank you so much. You recorded this 7 years ago and still soo good soo understandable, finally all questions and blurs in my mind are gone.

[@hasanshami8371]

I failed to fully comprehend a lot of these in university. I don't know what kind of mojo you're using but this explanation is brilliant.

[@user-qf2ps5pp5f]

Thank you very much, these are the best Python learning videos I have seen so far.

[@venkysmoments9155]

Your way of explaining and breaking things into smaller and understandable way is awesome. You are an great tutor.Learned lot of stuffs from your tutorials. My longtime wish from me is please make videos regarding Multithreading and MultiProcessing. So that all of us can make utilize and learn these concepts in a simplified manner.

[@nimaliberty4734]

Hi there Corey, YOU are a GENIUS. your VIDEOS are the BEST on youtube. I wanted to give up till I came across your videos. You are a life saver. A big THANKS to a HERO THAT YOU ARE.

[@pranayteja8330]

Hands down the best Python OOP tutorial!

[@slimanemesbah7003]

i like the way you explain by needs, like " we do this, because later on you gonna find an error" also i like the way you compare it to java, thanks corey

[@Mainhunpyarkamusafir]

Can't believe This channel was there and I found it now ... Awesome Corey .. I never understood these concepts before :)

[@shivajishinde1496]

The best python teacher I ever had. Thank so much for providing highly valuable information. I like your accent very much!!

[@iribaaa2643]

No way! This series was literally Awesome! Thank you man. Thank you...

[@dustinhxc]

This series was amazingly eye opening! You’re the best! Thank you! Such a wonderful prepared teacher!

[@TonyFlexPromo]

This one is actually blowed my mind. Thank you for this tutorials!

[@PavansnSMG]

Impressive. I just love these videos. They made Python even more interesting. Thanks Corey. Keeping making videos like this and help novice programmers like me :P

[@riteshkarmakar3597]

Completed the entire series. It was really great. Thank you very much!

[@marcc1179]

I was watching another video explaining the property decorator. However, he used so complicated an example that I did not grasp the idea. Yours is easy to understand. Well done! Best python teacher on youtube!

[@czagazeta]

Thank you for this series! Your series cleared up a lot of the confusion I had about OOP in Python. I sent some BTC, and likes your way. Cheers!

[@tivasalvation]

This is good! I actually just came here to learn the OOP. I just found myself going through the whole channel. The lectures are great 👌

[@gravnine]

Same here!

[@eliasemanuelpoitevin9034]

way clearer than what i got at college, thank you!

[@anirvansen2941]

Awesome, Corey's playlist is the best place to brush us on python concepts. Thank you again

[@matitiudeforever8155]

thank you for all of your lectures !! may god bless you and you find happiness in your life

[@meenumeric]

I first press like button before watching your videos. Awesome work!

[@vman049]

Just binge watched the entire series. Great explanations and a great reference to come back to. You're the best!

[@about_every_thing92]

coming to its end made me emotinal lol, Thanks Corey!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@franklinbradfield9131]

So much more useful than the Python docs that use "foo", "bar", and "x" for everything!

[@zes7215]

no such thing as need

[@NaachoElegante]

really appreciate your skills and talent of explaining...............loved everything about your videos...........be it voice, language, content, explanation, concept...........too good..............would request you to make some videos on data structures with python

[@tanselervansel1648]

The Best Teacher in Phyton so far. Thanks for your education.

[@jakebirkmaier5703]

I've been using a python OOP API for maybe a year on and off (thousands of lines/hundreds of hours) and never truly understood classes because I couldn't find a video series that explained them this well. This playlist has been so excellent for me and I appreciate you putting it together!

[@Jonathan-rm6kt]

Best python videos ive found, keep em coming. Im coming from an analyst background so am more used to performing examples like these with database operations. Can anyone pls describe other common use cases for attribute setting?

[@Mrjarnould]

Great video!

[@MdAzhar-kx7op]

Have never seen such a great tutor like you. everything you made so simple and easy to understand. thanks a lot man.

[@kvnptl4400]

superb series of 6 videos on Python OOP concepts, learned a lot. Thank you Corey!

[@LadyPary8]

I love how you explain everything so simple and clear! I watched this whole tutorial! Thank you so much! Be safe.❤️ Ps. Your really good voice makes this learning process a lot better and easier :)

[@coreyms]

Thanks!

[@imranayari]

You can as well password protect the changes that can be applied to the property decorator, for instance, on deleter implementation: @fullname.deleter def fullname(self): password = input('Please enter password: ') if password == 'pass': print('The fullname ' +self.first +' ' +self.last +' is deleted') self.first = None self.last = None else: print('Invalid password')

[@MODDINGPRIME]

Very useful! Thanks for this :D

[@DragonRazor9283]

Is there a smart way to obscure the "if password == 'pass'" statement so that others won't just look at the source code that easily?

[@eldadizhaky]

@@DragonRazor9283 You can use a hash function on your password, and when the user inputs a password, use the same function and compare the hashes.

[@wildmanofhk]

Good stuff

[@vanchark]

@@DragonRazor9283 You can use the bcrypt python module for that. Example: import bcrypt # pip install bcrypt pw = "test_password" salt = becrypt.gensalt() # salt is a random value that gets added to every hash to ensure it's unique hashed_pw = bcrypt.hashpw(pw, salt) # generate hash if bcrypt.checkpw(pw, hashed_pw): # compare hashes # success --> do something else: print("invalid password")

[@arindamghosh4555]

Thanks a ton .Finally got to learn OOP in python after watching these videos a couple of times

[@cinnion]

Great refresher series for something I have not heavily used for *mumble* years (I started around 1.0 and remember 3.0 was a future release last I used it heavily). Well structured, building one relatively short video on top of another.

[@iremkaya9103]

Why haven't I found you sooner, I would have done a lot better in lab classes of Python :(( You are great!

[@need2game834]

I like how the first video has over 1 million views and the last one 226k :D for me I watched the whole series and it was excellent, thanks Corey

[@domillima]

Corey, this is excellent. Sorry to unearth a 6 year old post. But truly your series is one of the best I've found in 2022. I understand adding the @property decorator will allow you to access your method as an attribute. If I'm following along: in this case you wanted to do this because you previously defined a self.email attribute (i.e. print(self. First + '.' + self. last + '@email.com'), but this is static as an attribute whereas it will update itself as a method. So creating a method and using @property allowed for the emails to update as the names updated, while the rest of your code remaining unchanged and referring to self.email as an attribute.

[@domillima]

Now, I kinda lost you with the full name examples. What is the benefit of using the property decorator with fullname. And then you used @fullname.setter. Why not just keep fullname setter as a method: def full_name(self, full_name): print('This is a setter method') first, last = full_name.split(' ') self.first = first self.last = last such that you could just type the full name into parenthesis employee1.fullname('John Smith') Whats the difference/benefit here? Thanks!

[@ibrahimal-mahfooz8737]

Such a clear and clean tutorial. I really benefited from this a lot when I studied for encapsulation.

[@champx549]

Bro you don't know how much this helps! A lot!

[@ManishKumar-hv8hg]

Please sir, like this, make a tutorial on "Data Structures using python" like; linked list, stack, queue, tree and graph

[@mujahidrasheed4987]

Great post.. For PYthon 2: the Class must inherit from the 'object' class to able able to use decorators. example: class Employee(object) learnt it the hard way..

[@mujahidrasheed4987]

Wanted to ask,, are there more vids coming up on OOP or this was it?? Thanks COrey

[@coreyms]

Hi Mujahid. These 6 videos were the ones I really wanted to get done. Now that they are finished I am focusing on some different video. I do think I'm going to add to this series later on, but have no immediate videos in the works. I did want to finish some videos on Multiple Inheritance and Abstract Base Classes, so when I do those videos, I will likely add them to this series. Thanks

[@zorkan111]

Mujahid, thanks for the tip. I'm using Python 2 and I was wondering why my code didn't work the way it did on the video. Any explanation as to why the class has to inherit from 'object'?

[@indirajithv5041]

Just read this comment. Looking forward to learning from coming tutorials! Thank you very much.

[@susannaventafridda430]

Hey Mujahid, I am also using Python 2 and when I try emp_1.fullname="Corey Schafer" (min. 6:40 and line 25 in the video) it gives me this error: TypeError: 'str' object is not callable. I have, like you, written class Employee(object):... but I really can't solve this problem. How did you do it? Thanks!

[@chrismalingshu]

it's a WOW moment! never thought that these property decorators could be that powerful! Amazing :) Appreciate it a lot!

[@sundaymanali5854]

Great series watched twice. Just listened for the first time. second time tried to code em in first. thank you a lot mate

[@Pkmafffy]

Amazing series on OOP - I learnt so much! One thing I don't quite understand is when to leave your attributes as public or using '_' (underscore) notation to privatise them. When playing around with the underscore notation I sometimes get 'maximum recursion errors'. I know this isn't covered in this series, but I would really appreciate it if you knew of any resources to better understand this. Thanks

[@kaushaltak007]

Maybe it's late but you can check this link out www.python-course.eu/python3_class_and_instance_attributes.php

[@swadhikarc7858]

Hi Corey, Your videos are none other than best! Simple and easy to understand. I am a beginner to Python and have a question in deleter. The example you have shown is used to delete a property. Can you explain how to delete an instance itself? example: del emp_1? Thanks a lot for your videos!

[@coreyms]

Hey there. If you wanted to delete the instance and completely remove the binding of emp_1 from the namespace, then yes, you could just say: del emp_1

[@dragost8670]

Hi, Corey. Just tried to use del for an instance but the second one was deleted either. Here is the code: class Robot: def __init__(self, name): self.name = name def say_hi(self): print('The robot ', self.name, ' says hello!' ) def __del__ (self): print('The robot ', self.name, ' was destroyed! :((') if __name__ == '__main__': x = Robot(input('the name of the first robot, please:')) y = Robot(input('the name of the second robot, please:')) for i in [x, y]: i.say_hi() print('deleting first robot') del x print("we'll not destroy any robot anymore! :)") y.say_hi() # after running this code, y instance is also deleted. I really don't understand why... Kindly please help on this. Thanks in advance!

[@PiddBoo]

Your question is already 3 months old, therefore i don't know if this is helpful to you: but your code works just fine. I had to change the "if _name_ == '__main__'" to "if __name__ == '__main__'" because it was causing a name error. But other than that the output is as expected.

[@riturajsminivlogs]

if True: x = Robot(input('the name of the first robot, please:')) y = Robot(input('the name of the second robot, please:')) for i in [x, y]: i.say_hi() print('deleting first robot') del x break print("we'll not destroy any robot anymore! :)") y.say_hi()

[@kinmokuseikaori11]

This is a billion times better than anything I have seen thus far. Simply amazing!

[@bsmaheshkumar5328]

His quality of explaining is next level, Thanks, buddy.

[@johnhendy1281]

This has been an amazing series! I've taken some Coursera classes, but always felt overwhelmed when I saw classes and the dreaded __foo__ and `self` stuff start showing up. Thanks so much for making these! One question... is there a reason not to do: `self.first, self.last = name.split(' ')` when you define the fullname.setter? Perhaps expanding is more readable? Quick edit: I did this, and it seems to work fine. I mainly wondered if it's considered more pythonic to do one vs. the other.

[@powerblender]

I think you can do that.. but using self.first = first and self.last = last makes the code more readable, I think.

[@silverzero9524]

maybe he forgot lol

[@sbarter]

self.first, self.last = name.split(' ') creates a list. i'm guessing here but it probably slows down the code.

[@darkaero]

I think he did it that way to be able to explain step by step what was going on when you're using the split() to separate the full name and how using the self.first and self.last gets it to work again.

[@manishbagra9494]

he did it to make it more clear but you can also do like " self.first, self.last = name.split(' ') "

[@soumitripattnaik]

At 5:54 can't we simply do self.first, self.last = name.split(' ') ?? It's been a great learning experience from your videos :)

[@coreyms]

Yes

[@h82fail]

Was thinking the same thing and was getting ready to type it out to test myself, good to know it will work.

[@karthik-ex4dm]

Good one!

[@kamranshirazi3030]

Sure, good observation. But as a teaching method, I think, it was more artistic to have a uniform format as the class's __init__ the way he did it, that is also better for people who are learning it.

[@Tadae323]

Seriously, checked the whole Internet and your tutorials are the best.

[@timo_b3]

I watched many other videos about this topic, but this series is by far the best one to learn oop python. thank you corey!

[@anon-sl4vp]

print('Love learning with Corey Schafer xD')

[@johntank3004]

This would a good example how to deal with someone switching their last name because of marriage or someone having a full name change.

[@antondjayzakov4776]

Learning in a big rush. Everything clearly explained. Thank you Corey

[@KOtwenyo]

I must say, I am learning from you more than I did from an MOOC that teaches the same Python, thank you Corey

[@manulgoyal6662]

30 semicolons disliked the video

[@Charlie-lf7iy]

Nice one!

[@PersianPoemPulse]

forgotten semicolons actually :)

[@thengakola6217]

30 what?

[@avenger_aawin4971]

@@thengakola6217 java coders

[@wexwexexort]

as a semicolon I dislike this comment not the video, lol =p

[@byheartgeeta]

I finished this in a single sitting along with the practice. I can't explain how precious this content is. more power to you @Corey. so much love from India.

[@saurabhkansal8178]

Before starting these videos, I don't have any knowledge of classes. But now i got the concept and can understand the source codes in better way. Thanks Corey... Thanks a lot..

[@noyou9349]

Honestly, this series is the best I've ever seen on OOp. It's concise, clear, and the explanations are good. I'll say it again, I wish I had found this series when I was learning OOP. Good job

[@boopmcbloop8648]

Thank you so much Corey! I'm so glad I discovered your channel. I want to go into data analytics and I'm happy to see all the video series you've made about Python libraries. I'm looking forward to watching more of your tutorials :)