A "Production Python Code" course by you would be a hit. These are the things I never picked up as a mostly self taught programmer. Great stuff.

I love that you show WHY you would want to use this rather than just what it is. It really drives home the actual usefulness of this

Update: as of python 3.10, slots are now supported in in-built dataclasses with the ``slots`` argument

I have been looking for such tutorials (unique less known concepts for intermediate programmers) for years now. This channel is an absolute gem! Great work James!

Thank you for this valuable video! Before watching your video, I assumed dataclasses were just a Python version of C structs, for cases where you didn't want to add functions in a class but didn't want a raw tuple either. After watching your video, I learned that dataclasses are much more sophisticated than that.

I love the way you start by explaining and go to the solutions. Most people just start by showing what it does and how to do it, without ever mentioning why we really need it. Keep going, your style of teaching will reach millions of people.

Best Python videos on youtube. Or maybe most valuable? Covering so many useful and unique topics no one else seems to.

I'll remember this. I don't know much about OOP so I didn't understand much. When I'll learn, I'll re-watch this video.

I don't think my jaw has ever dropped from a coding video before. The beauty of being an engineer is you learn something new every day. So much hidden utility in python its amazing!

Cool functionality. Thanks for sharing @ 3:32 the dead pan to the camera... Lol ! Love the dry humor

This is actually one of the best CS-related channels I've watched

Wow, this is an outstanding video! Thank you so much. I just found out you’ve got a Python course, I’m in

I have just started experimenting with Python to use animation libraries from Grant Sanderson / 3Blue1Brown and have seen your videos pop up. Your organization and presentation of these tips is great for both initial learning and reference. Very concise, straightforward examples without cryptic foo / bar based variables, etc. New subscriber!

I have no idea what's happening

As someone who has been slowly getting into the nitty gritty of writing classes, this video was informative, scary, and then relieving. Not only have you showed me what I have yet to learn, but also why it's something that should understood, but hopefully never written.

I love that you called out the issue with __slots__ The default dict instance representation has turned my implentation into a massive memory hog, tuple instance representation fixed that! Maybe __slots__ and other memory optimization and profiling techniques could be the topic of a future video!

Best video on dataclasses I have ever seen by far. Loved the approach of firstly doiny an example implementation, then showing the issues found, and finally solving them using the feature displayed.

**Note: As of Python 3.10 data classes DO support slots.** Thanks for adding it to the description, this video is gold!

I'm starting to realize how damn useful class and method decorators are. I have the cumbersome Learning Python book by Orielly but these videos offer a lot of value due to how terse they are. @cache and @dataclass all day baby

U got me with the “I just subscribed “ look lolol

Seen a few Python dataclasses videos but this one is the clearest and most informative in a short time. Well done!

About 2 years ago I came over from writing bare C to having Python as my daily driver. I've grown to really enjoy the language. 95% of the time it suits my needs and videos like this just illustrate how absolutely brilliant it can be. Thanks for the new trick up my sleeve!!!

The new mic has arrived!

This is the type of stuff classes should teach. I really appreciate your content.

LMAO That pause and eye contact after he read "I just subscribed". I FELT THE PRESSURE MAN!

Thank you for introducing me to dataclasses! Using a dataclass has just considerably simplified a module that I'm working on right now.

Subbed to this channel at like 300 subs and now 2 weeks later you're at 12.3k. you're going places my dude, keep it up, great content

Dataclasses are a beautiful idea, and hearing "There's gotta be a better way!" reminds me of Sir Raymond's classes. Great stuff 👍!

I am watching all your videos since a random youtube recommendation. Some of the best coding videos I have seen yet, very clear, easy to follow and often about topics and features I would never thought that I will benefit from. Thanks!

What makes this video really useful is thay you show why you need it rather than what does it do.

3:31 the pause and cold look after "I just subscribed" :D

C# dev here learning python for my Software Engineering thesis. I love your videos, directly to the point and with a lot of useful information!

This video gave me goosebumps... This feat is amazing!!! Great video! Very succint and useful!

These are really great videos! I'm just learning Python for work and they're extremely helpful with simple and clear explanations.

that little pause at 3:30 made me subscribe 😂

Your videos have a high learning value and I, as well as many others, appreciate your effort in making coding content. Although most of the times I do not understand what you're talking about, obviously due to me being a beginner in programming (Python), I will make sure to keep some of the things in mind and come back here much later when I'm ready.

This is great! You do a great job of explaining these features. I always found classes to be annoying to deal with in Python and have stayed away from OOP because of that, but this approach might change my mind.

Your videos are extremely information rich, yet not "dense" in terms of accessibility of the ideas.

Thanks for shining a spotlight on these very useful Python modules with a good, concise tutorial. Great comparison between attrs and dataclasses, too.

This is the perfect intermediate to advanced python concepts I would like to see covered in a single comprehensive course. Your explanations are very punctual and I seem to really get a lot out of your videos. I am glad I found this channel. You should really consider, as others have suggested, to make such a course.

3m30... That is the new Deathstare!! Awesome, Subbed. Great vid and Mitch appreciated.

Good intermediate YT content is hard to come by, subbed! Amazing post 😁

Very cool. I can see this saving alot of time. Python never ceases to surprise me

Wow, I commented and asked for a dataclass vid a week ago and you actually delivered. Nice :)

Your vids are the perfect thing for me, I usually get lost in long videos. Yours are short, simple and actually demonstrate applications of it

Hi! If I want some of the attributes of an instance to be read-only, instead of all attributes frozen, could this implemented with "@dataclass"?

Amazing video, love it! (loved the "hinting eye contact" @ 3:30 ;)

You never fail to amuse me. Didn't know that fields thing

This is the first video I've watched on this channel. I love this guy! Great work!

I remember doing project for school in java where the professor didn't let you use any libraries, so if you wanted something to be comparable you had to type every thing out... my God. This brings tears to me eyes that dataclasses in pyton will automatically do all of that for you.

Thanks for putting the time and effort to explain dataclasses thoroughly. You're the best!!

Ey this is cool. My college classes made me design my own cpu but never actually taught me any useful stuff like this.

I shouldn’t watch this so close to going to sleep. This is going to give me weird dreams.

I am way too noob for this video but I'll watch it whole and watch it again after 6 months. Thanks!

So basically this is python's equivalent of lombok's @Data annotation in java and python supports this out of box Thanks for sharing it Your videos are amazing. You always get to the point without wasting any time

Highly recommend checking out pydantic. It's a huge extension to normal dataclasses, adding serialisation, better validators, forced typing and more!

as a beginner with some basic knowledge it is the content I started peeking in, some professional stuff that I can learn actually makes life much easier!

Great stuff man! Im new to the channel but I've already learnt a lot from your videos! Keep churning out these high quality content!! :D

Really liked this. I'm building a library for Kivy-based apps that provides an interface for working with TastyPie on a Django-based server, and this is exactly what I need for storing information related to each model schema exposed through the API. So much simpler and readable. Always good to learn more about Python, thanks for the vid!

HOLY SHIT. Why didn't I just learn this ages ago? It's fantastic!

LOL that subtle hint at 3:30 😂👍

I've just used these for my users in flask. Great explanation

Subscribed. Really great one. Will be following more of yours tutorials.

Apart from the amazing video, you're acting skills are on point :D

For dataclasses, there is direct support for __slots__ (added to python in 3.10). Just as an update.

Wow. After this video I think I really got the gist of Python dataclasses. And so many ideas popped up in my head to refactor some code. Thanks a lot! 😃

I've being doing python for a while now and a lot of things here are new to me. Thanks for making this

That 3:29 was hillariously sneaky! Good video btw

When I first came across decorators and understood that the dectaror takes the function or class as an argument, I thought this will have so many uses. Data classes are gold

This is really cool and I just learned that you can put decorators on classes :) thank you!! You have earned yourself a subscriber.

I really like your style of videos and have watched most of them already. But I'll admit I'm not sold on dataclasses... With your first example, you know exactly what python will do in each use case. With dataclasses, you've wrapped your code with an opaque magic cloak that you can either simply hope that it does what you want, or you will have to test every corner of its behavior, or analyze all the corners of the dataclass code itself. And newer coders will not understand it -- I know because someone at my work uses them and even after explaining them to me I had no clue what he was talking about or what they did, and I've been writing python for 10 years.

Most valuable 9 minutes of my python career

To get the nice syntax using the `attrs` library, use `auto_attribs=True` in the decorator and you'll be able to get the same syntax ability of mixed defaults in `dataclass`.

This channel is a goldmine.

I took CS in bachelors, CS in masters and have PhD but never have I crossed this, thanks a lot man, this is actually pretty helpful. it shows how dumb down the CS degrees are right now, No one is doing any code and doing shit that is outdated and have no real life usage.

One of the best Python OOP videos I've ever seen. Thanks!!

When he read the comment "I just subscribed" and looked at the camera I immediately gave in.

I didnt know this so thanks for the video. One thing I missed was the speed comparison. You made the Manual class larger by giving the performance as an excuse(not equal and all sorting methods) but when discussing dataclass you never mentioned the performance overhead. The size of the code probably justifies it’s slower anyways but its not mentioned :(

What a nice and clear explanation! I will try to implement this in my thesis project!

Higher than my current level, but when I get there, this will be even fantastic. THANK YOU !!!! :D

Dataclasses vs named tuples?

Omg I just finished a Python OOP assesment at uni, where was this library! (I am also just stupidly happy I understood this video) I had all these issues so I will be using this in the future. Thanks so much, keep up the great work!

WHERE HAS THIS BEEN ALL MY LIFE

Great explanation. Can you explain @property? I don't think I get it right

Cool and informational video! However, since I am still learning python and haven't written a lot of production code, I think it would've helped me to see more clearly where the limitations of dataclasses are. Can or should I just use them everywhere, if they are saving lots of time? When should I NOT use them?

That was soo awesome .. I saved a lot of time writing code for json responses ! Really awesome stuff 😁

Insanely clear and valuable tutorials dude! Subbed in a millisecond

7:33 attrs allow u to specify validators & converters wholly molly, thats awesome and exactly what i needed.

I'm a beginner, but I started using data classes more ad more just because it was easier to keep things organized and understandable.

wow, i thought i knew python

The *slaps table* is very important in the "There has to be a better way."

Great video, I just found your channel and it's great, congrats

great video. I'm not a programmer (more back end stuff ) but this was excellent to watch.

Never heard of dataclasses. They look super useful! BTW, I really like your channel.

You have a very deep insight into the python source code

The fact that I was lost 10 seconds in is a testament, I need to get back to this. I'mma just save this to the list. (30-40 hrs into learning python)

If your use-case requires more capability than dataclasses can provide, I highly recommend looking into pydantic instead of attrs. We switched from attrs to pydantic in a project of ours that makes heavy use of these dataclass-like patterns for things like packet handling, and pydantic has been a huge step up from attrs. It has much more powerful validation mechanisms, cleaner and less quirky syntax, integrates very nicely with typing and provides a lot of useful mechanisms for generating objects from data you receive remotely (say as JSON) rather than creating them yourself, or that you need to transmit to other external services/components. It even has built-in support for automatically generating JSON schemas from the pydantic classes, which can make it much easier to provide a machine API for interfacing with your classes or generate a GUI using something like json-editor.

My search is over, @dataclass put me in a whole new level.

you just explained private vs public attributes in like 5 seconds, something that i didnt understand after years of coding lol

And on that moment when he said "put that code and delete it" i start laughing and go for a break to make a cup of tea