You Are Going To Like These New Features In Python 3.11

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Python 3.11 is almost here! Not all of the changes are immediately noticeable when you look through the release notes. However, today I will cover 7 new Python 3.11 features that you are going to love because they'll make your life a lot easier.
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👀 Code reviewers:
- Yoriz
- Ryan Laursen
- James Dooley
- Dale Hagglund
🎥 Video edited by Mark Bacskai: / bacskaimark
🔖 Chapters:
0:00 Intro
1:07 Tomllib
2:18 Exception notes
3:21 Tracebacks are more precise
3:57 New LiteralString type
5:01 Self type
6:41 StrEnum type
7:40 Improved performance
#arjancodes #softwaredesign #python
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Опубликовано:

2 июл 2024

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Комментарии : 209

@ArjanCodes 8 месяцев назад

👷 Join the FREE Code Diagnosis Workshop to help you review code more effectively using my 3-Factor Diagnosis Framework: www.arjancodes.com/diagnosis

@geoffseyon3264 Год назад

I think the performance improvement is one of the most key benefits of Python version 3.11! I hope that this trend will continue in subsequent versions as people continue to compare python to more performant languages.

@PanduPoluan Год назад

Microsoft has tasked -- and paid -- 2 Python Code Devs to speed up CPython. Mike Shannon and Guido van Rossum. And Mike outright stated that the target is 5x performance!! At such speed, the performance penalty of Python will be less and less important, and people will emphasize on Python's ease of use, or even the "compile-less" toolchain will be preferable!! And with a parallel effort to run Python in browsers (via Wasm), we might just be on the cusp of seeing Python as a first-class Front End language!

@JP-re3bc Год назад

@@PanduPoluan CPython is not Python (anymore at least)

@PanduPoluan Год назад

@@JP-re3bc The heck are you talking about? CPython is the reference implementation of Python, written in C. I think you're confusing it with Cython.

@twentytwentyeight Год назад

I watched your video all the way through and sent it to my colleague who is learning python too, and wihtin ten minutes I also got an email reminding me you had a new video out! Thanks a bunch Arjan! The absolute ONLY youtuber I look froward to getting emails from

@MaycolTeles Год назад

This new “Self” type is amazing! I had to explain the whole core of “__future__” and “annotations” for an intern a couple of days ago and I can’t even imagine how simple it would be with this type, even though what you said about classmethods are true

@equu497 Год назад

Just found your channel earlier this week and I am impressed by the quality of your videos! Keep doing what you do sir.

@aashayamballi Год назад

This speed improvement will definitely help in existing projects. (For example Django). Since classes variable initialisation all these being used extensively used in the existing frameworks and with this performance I believe definitely the frameworks performance is gonna improve too.. so for this reason I'm looking forward to use Python 3.11 Thanks Arjan for this informative video. 🙏🏽

@superscatboy Год назад

I haven't written any python since 2.4, but I watch this channel religiously to keep myself in the loop. One of these days I'll want to use python again and what I learn here is going to make the process of catching up much less painful :)

@transatlant1c Год назад

The first thing that sprang to mind re performance improvements is how that will eventually (hopefully) translate to lower bills for AWS lambda functions and equivalents, for those that make heavy use of python in that use case. Nice 👍

@idcarlos Год назад

Right now only if you use docker containers. Python runtime is stuck at 3.9 for AWS Lambdas and 3.10 is one year old.

@ErhoSen Год назад

Thank you Arjan! Always promote your videos between colleges (win-win)

@RR-rd1yr Год назад

Thanks bro finally someone who isn't posting malware or fake stuff, you deserve my subscribe!

@szjtk Год назад

that was exactly what I needed , thank you so much

@gustavomendez6279 Год назад

Concise and understandable information. Aesthetically pleasing video. Good audio. Man, where has this channel been? Subbed.

@ArjanCodes Год назад

Thanks for subbing! :)

@BrianStDenis-pj1tq Год назад

So good, thanks Arjan.

@konstantinmykhailov6708 Год назад

Great video! Could you please also cover the new asyncio TaskGroups and the GroupErrors with the except* syntax? Thanks!

@jorgesilva932 Год назад

Great suggestion, I would also like to see a video about the new TaskGroups !

@martynhale4053 Год назад

Great video - I enjoy the content, you do a great job of it.

@thichuyen1597 Год назад

Worked smoothly, tysm

@marianarodriguez599 Год назад

Hey! Thanks so much for this video!

@Darakon Год назад

Love your stuff dude. Thanks.

@ArjanCodes Год назад

Thanks, happy you’re enjoying the content!

@lorlgd Год назад

I've been waiting for this version after Guido's presentation ( you can Google the presentation, I believe it's under his GH). I need to benchmark my scripts' performance and see the improvement. Thanks for sharing

@ErikS- Год назад

9:18 - The home of both Arjan and off course Guido, the creator of Python. Next, we will see Arjan start showing us "frikadel" and "kroketten".

@Ponder_AI Год назад

Looks great!

@HeadInstead Год назад

great video Arjan. you might want to add the link to the chess roast video 5:55

@lastk1ng201 Год назад

That was great. Thank you.

@ArjanCodes Год назад

Thanks so much, glad the content is helpful!

@amandubey5287 Год назад

This is just amazing I just updated my version and tested these what you just showed, Thanks

@ArjanCodes Год назад

Thanks Aman, Glad it was helpful.

@tadastadux Год назад

I like your content and the jumper!

@anaselhassani2545 Год назад

THANK YOU SO MUCH FOR THIS VIDEO

@mentefria98 Год назад

I love the way you explain things, very calmly and professionally, not as the nowadays kids that only know how to explain hello world with weird music in the background and make some shitty TikTok video. Thanks for being alive! Keep it going! You are doing a really good job.

@michalkorsak9726 Год назад

Wow! it's Amazing I did it well ! Perfect work !

@hasanmahmud2016 Год назад

Works good, tnx

@Mr1995Musicman Год назад

Oh, I also use the StrEnum pattern myself as well, but I'm never quite satisfied that I'm not screwing it up somehow. Great to see that built in

@astronemir Год назад

I always use this

@Gummibandet1 Год назад

You coulve showed how the add exception notes looks in the trace when running it

Год назад

Guessing they're not showing at all. You can probably print then yourself though.

@scraps7624 Год назад

This is the top channel for anything python, great video as always

@erastfandorin279 Год назад

Hey Arjan, I think that in your first example of performance boost in python3.11 you are misinterpreting actual speed boost to 50% as it usually happens with this counter intuitive thing. TL;DR u have 0.095 sec/code and 0.053 sec/code. Then in 1 sec you achieve about ~10 and ~18 codes done which actually is an 80-90% speed boost.

@ArjanCodes Год назад

You’re right - that’s a good point. And it demonstrates the performance improvements even more clearly.

@nivimani Год назад

this is subjective - the new performance can be seen as 50% faster in comparison to the old performance, but the old performance can be seen as 90% slower in comparison to the new performance.

@russianbotfarm3036 Год назад

@@nivimani But that’s not subjective.

@nivimani Год назад

@@russianbotfarm3036 you're right. i meant something like, it depends on someone's preferred point of view.

@havenisse2009 Год назад

So we now know the next versions of python will be 95, 98 and se.

@ArjanCodes Год назад

Haha, good one!

@mcfahr3655 Год назад

Thank you!

@ArjanCodes Год назад

Thanks so much, glad the content is helpful!

@bartdebruijn4599 Год назад

Good vid!

@edwinolvera2731 Год назад

Thanks so much

@chrisfahie2767 Год назад

Thanks it helped me install it

@pleggli Год назад

I so much wished that the error positions in tracebacks somehow would have used the more common line:column formatting that most compilers use. On scale the verbose 2 extra lines just adds unnecessary cost to logging unless you disable it.

@Rebeljah Год назад

Almost here!

@darrylbaker5271 Год назад

Clearly explained, I understood, and I'm not a Python user but will be soon

@barbaralemagac2333 Год назад

thanks helpful vid

@russianbotfarm3036 Год назад

> StrEnum saves typing > proceeds to type about the same as the old names = auto() is ugly boilerplate, but it does reduce the chance you’ll misspell the particular enums. They should have done it as a context, EnumDefiner or something.

@Blooddarkstar Год назад

I find your videos extremely helpful and well executed. You should do a full coursera / udemy course on "coding well". By that I mean content focusing on the design of code and the aspect of problem solving before you even write a line of code. You do this in the videos here on youtube as well, but a full-blown structured course would be awesome. I have seen so many Intro to Programming / python courses which do not focus on the importance of structuring your code.

@ArjanCodes Год назад

Glad you like the content! There is a course actually if you’re interested: www.arjancodes.com/mindset.

@chesshooligan1282 Год назад

When the execution time halves, it means the speed has doubled. That's a 100% performance improvement, not a 50% performance improvement.

@mahdi7d1rostami Год назад

taking enjoyment in writing complicated one-liners just for fun I didn't had any way of debugging or figuring out how can I fix them when they didn't work. Now with new trackbacks it would be easier.

@astronemir Год назад

Can you do a video on Type annotations for Pandas and the new 3.11 Generics changes?

@AbdulBasit-ib6by Год назад

I love the feature in 3.11 where its give you precisely where the the actually error.

@udianilbey Год назад

Self type isn't introduced for renaming, it's introduced to type annotate methods of inherited classes.

@CynicAtLarge Год назад

With toml support do your recommend using this instead of hydra with yaml files for configuration?

@willemvdk4886 Год назад

Somehow "version 3.11" has a very nostalgic ring to it.

@YourCRTube Год назад

Only if you are old

@StickOnLSD Год назад

Hey Arjan, can you please make a tutorial about logging? thanks!

@jahshuah Год назад

Totally not related to Python 3.11, but I love that sweatshirt-where’d you pick it up?

@tomlightfoot6304 Год назад

In his piece class, what does the colon do in x: int or color: Color = Color.None? Ive never seen that before.

@akshattamrakar9071 Год назад

Those performance improvements are crisp

@astronemir Год назад

Almost here 🎉

@MichaelRonnfeldt Год назад

Those are some nice performance improvements.

@ArjanCodes Год назад

Thanks Michael, happy you’re enjoying the content!

@Rana-yc6yt Год назад

You are awesome 👌

@matthewlandry1352 Год назад

Nice video so I clicked subscribe 🎉

@abdelghafourfid8216 Год назад

Do Self type also dynamicaly change if I use a subclass ?

@rockNbrain Год назад

WAITING FOR 3.12 VERSION, TKS!

@haleynaga5671 Год назад

i like your thumbnail of actually excited for something whereas others people's thumbnail goes something like "you should not be developer" or "you maybe not a data science to be at all" so its good to see fresh new face

@mayorc Год назад

At 5:25 how did you add those unicode symbols easily?

@nck-d Год назад

Thanks

@ArjanCodes Год назад

Thank you so much, glad you enjoyed the video!

@dvdspndl Год назад

Awesome video, thank you. The example of faster 3.11 that demonstrates it using class get-set-delete in 8:25 is about the same speed as what you'd gain with __slots__ on 3.10, and it looks like slots are no longer faster in 3.11. Do you know what happened there?

@ArjanCodes Год назад

Thanks David! When I run a test with Python 3.11 and compare slots vs no slots, I still get a 20% speed improvement when using slots (comparing the median execution time). So it seems that even in Python 3.11, using slots is still quite a bit faster.

@dvdspndl Год назад

@@ArjanCodes Thank you for the reply. Interesting, I checked again and you are probably right, there's still a difference, although it seems much smaller than what I had in python3.10.

@incremental_failure Год назад

3.10 was really cool feature wise but 3.11 doesn't add anything I depend on. The speed improvements are awesome though, they're going in the right direction.

@__gavin__ Год назад

9:00 actually that would be nearly a 100% improvement (half the time is twice as fast).

@Casimistico Год назад

Best tutorials ever

@benc7910 Год назад

Which color theme is this in ?

@Yotanido Год назад

I see a lot of influences from rust in this. I like it a lot. Soooo... algebraic data types when? It's honestly the feature I miss by far the most in python.

@carlosrivadulla8903 Год назад

what do u think of carbon?

@edgeeffect Год назад

It's cool to get a definitively correct pronunciation for "Edsger Dijkstra" after all these years.

@StalkedByLosers Год назад

What is the benefit of toml ove ini files? The structure looks the same. Just import configparser....

@frozeneye100 Год назад

Lol. Nice feature of python. I am still trying to learn and just think f strings are awesome. Just think I am wrapping my head around stuff and then the f bomb ohh SQL injection so we do different now. I will not french "f string" but yeah f bombs is like a pun intended. Nice video. But yeah, programming languages like Linux is just a rabbit hole without end. Poor me being newb. But will get there. But as always. Nice good video with not all info but it does allow good topics for research. That I think is a very good point. Not giving do like this but making clear here is how you can. And that is worth a lot. That is key to education I think. Not giving answers but give enough in way to make it useful but also there is work to be done and learn

@adrienc8716 Год назад

Is it possible to read an xml file with tomlib ?

@MrGeometres Год назад

Almost here, but as per tradition you'll have to wait 6 months until all the packages you need support it.

@pillmuncher67 Год назад

I'm so glad they finally put Tail Call Elimination in CPython!... Oh....wait...

@-mwolf Год назад

bruh haha 3.11 is so nice I remember using hacks to implement all these things like StrEnum and so on myself. Also i think with 3.11 there should be shape hinting for np arrays or tensors which is a game changer in ds / ml.

@rogertunnell5764 Год назад

I saw a proposal for this the other day, though I'm not sure if it made it into 3.11

@miirazgmail Год назад

9:11 I used Dijkstra's algorithm in my PhD thesis years ago :) And of course in Python (next, I rewrote it in C, because of performance, but prototype of software was written in Python)

@1Eagler Год назад

Done it when RTFM got to life

@rusektor Год назад

LiteralString didn't work for me. I tried the example from documentation - and it didn't work.

@daverangie Год назад

What would performance it be like compared to 3.7

@snoopyjc Год назад

I love how your outfit spells “11” :-)

@parkercrofts6210 Год назад

ur a fcking legend dude honestly

@TomTrval Год назад

Yes yes self typeeee

@avalagum7957 Год назад

Is it possible to have a portable Python, i.e. no need to install, just download 1 single file and put it in the PATH?

@ingframin Год назад

Honestly, I cannot wait to get this new version.

@ArjanCodes Год назад

Only a few days now.

@ewerybody Год назад

honestly? release candidate 2 is available for download on the official website

@janetdashevsky495 Год назад

Hi, Can you please share the source of the hoodie? My husband really wants one :)

@JP-re3bc Год назад

Does it remain slooooow? Most of this new bloatware will only make it even slower.

@gnitsaf Год назад

toml config files... so like rust? That's pretty sweet

Год назад

Ive always wondered why exceptions in python don't have more info. Coming from the java world it felt a bit weak.

@rogertunnell5764 Год назад

Interesting take. I've always found exceptions in Java to be far more cryptic. Granted most of my work in Java has been heavily dependent on libraries, so maybe the library authors are more to blame than the exception handling.

@videosgx3548 Год назад

now i am in a good mood

@udovyk Год назад

Python 3.11 almost here and AWS Lambda still didn't implement v3.10 runtime :)

@ArjanCodes Год назад

They might be stuck on the current stable version of Debian, which has Python 3.9.

@thisoldproperty Год назад

I implement Python in Azure Functions, which maxes out currently at 3.9 :(

@PanduPoluan Год назад

Dijkstra, Guido, now Arjan. The Dutch gave many great things, and so I'm saying "hello" from (formerly) Pays Kolonie 😄 Anyways, 3.11 performance improvement is really amazing in asyncio! I had script I originally wrote in 3.10, it runs a bit faster in PyPy, but MUCH faster in 3.11! So much so that I broke my rule of not using anything ".0" for production 😜 Edit: Maybe not asyncio itself per se, but every asyncio task I queued will end up instantiating a class, so I believe that's where 3.11's speedup benefitted me greatly.

@swapnilchavan7076 Год назад

Very helpful. Please prepare the video on Kubernetes. Thank you and lots of love from India.

@ArjanCodes Год назад

Happy you’re enjoying the content!

@swapnilchavan7076 Год назад

This is starstruck moment for me. I love your content so much.

@AnthonySherritt Год назад

How big are the pulls on your hoodie?!

@cont8155 Год назад

Galaxy size pulls for galaxy size hoodie for galaxy size brain 🤯

@ArjanCodes Год назад

I’m compensating.

@AnthonySherritt Год назад

@@ArjanCodes 🤣 for being so brilliant?

@nck-d Год назад

@@ArjanCodes 😂😂😂

@6rusT Год назад

those pulls are like karate belts

@miguelvasquez9849 Год назад

in StrEnum it automatically lowercase?

@lucaspetersen5074 Год назад

yes

@AlexGb007 Год назад

So all I have to do to becoming a great computer scientist is moving to the Netherlands! Got it!

@ArjanCodes Год назад

Exactly! Though the problem is that once you're here, you'll be surrounded by great computer scientists who are going to continuously point out any minor thing you're doing wrong. It's like real-life Reddit :).

@AlexGb007 Год назад

@@ArjanCodes 🤣🤣🤣. I love your sense of humor 😂😂

@frankieepurr Год назад

Still using python 3.4 at school

@theultimatereductionist7592 Год назад

the reason I hate hate hate computer programming is that absolutely nothing any of millions of online tutorials or videos can help me do the specific thing *I* need the computer to do: computer differential algebra.