Python 3.12 is HERE!

[@NotAUtubeCeleb]

The comprehension change is a 10/10. Literally no change to your code required but comprehensions become twice as fast.

[@LambOfDemyelination]

twice?

[@BrianWoodruff-Jr]

Looking forward to my coworkers comprehending twice as fast!

[@ianliu88]

I guess this also allows comprehensions to be evaluated in pdb session? Dunno, must test

[@nigh_anxiety]

Haven't checked it yet, but does this also mean that a list comprehension for a class variable can now reference are pre-defined class variables? Previously it would fail as class definitions are not an enclosing scope.

[@jamesflames6987]

Great to see Python taking some inspiration from C++ such as typing and incomprehensible syntax.

[@headlikeahole6548]

Types in C++ affect your programs, in python they are just for IDE hints.

[@jamesflames6987]

@@headlikeahole6548All of the complexity, none of the functionality.

[@tuberroot1112]

@@headlikeahole6548 " in python they are just for IDE hints." Even hints would be better than the instanity of gender fluid variables and non binary booleans !!! Python is a mess on every level.

[@nagoranerides3150]

@@jamesflames6987 But they've really internalised the lesson from C++ that you can say you're OO without having to actually enforce it, so you can still have functions floating around any old place and of course none of the flow-control is OO at all. But, you know - whitespace!

[@squarerootof2]

@@jamesflames6987 LOL,🤣

[@Konomi_io]

the f string change is so helpful, ive run into that one quite a few times

[@王沛升]

I usually use f"""{"somthing"}"""" if the double quote cannot be avoided. But usually f"{' something '}" would get the job done. Also use f"{{ {something} }}" when dealing with some command prompt requires {} as parameters.

[@NoNameAtAll2]

you've run into using quotes inside quotes and deciding not to escape them?

[@SuperGrimmy]

As someone who maintains a lot of packages.. 3.7 disappearing is definitely the best. Can we fast track it to 3.10? :D

[@nigeltan7766]

is python 3.7 bad? im no expert but am curious so pls elaborate

[@sid6645]

Losing 3.8 might be bad because of nvidia, as someone pointed out below.

[@SuperGrimmy]

@@nigeltan7766 It would be "bad" to use it now since that version is no longer getting any updates including security fixes. Newer versions have the new language features and much better performance anyway.

[@SuperGrimmy]

@@sid6645 yes, I the real world it would definitely be premature to fast track deprecation. It's just something some python package maintaners dream about because it can greatly reduce their work.

[@aintaintaword666]

And I'm still using 3.6 for an old custom-build tensorflow version that was specifically compiled to run on an ancient GPU

[@rx97_mc]

I think with `kwargs`, it's not that having the same type for each `kwarg` is a natural solution but it's more like it's consistent with the typing of `args` where it *does* make more sense to have the same type for each arg.

[@lawrencedoliveiro9104]

6:30 Just a note that, as with any function, generation of the code happens only once, at compile time, but creation of the function _object_ (ref to code + environment binding) happens every time that statement is executed.

[@Kruglord]

11:51 There's exactly one problem with `itertools.batched`, it's passed tense. All the other itertools are present tense, i.e. `groupby` rather than `groupedby`.

[@negativeseven]

I read it as an adjective, rather than a verb. Like functools.partial.

[@simp-]

never thought of that before, but It's pretty much same as in build-in python functions sorted() and reversed(). I mean we have ex. not mapped() but map(); not enumerated() but enumerate() tho I have never see anyone complain about it, even tho it's kinda not consistent

[@piaIy]

​@@simp- Sorted and reversed are different, they suggest that the collection is not modified in place, but a copy/iterator is returned, whereas you can't really map or enumerate in place. As for batched, I think they chose that name because batch can also be interpreted as a singular noun. Kotlin also uses the name chunked for a similar method, and their naming conventions are pretty consistent.

[@simp-]

@@piaIy oh, okey I get it, thanks a lot

[@wChris_]

im already excited for python pi (or just python 3.14) as it is now very very close

[@Liam3851]

Ever since python 2 went out with python e (2.7.18), I've been thinking it would be aesthetically pleasing for the python 3 line to end with 3.14.15. Perhaps if GIL removal by default gets released as Python 4...

[@obed818]

@@Liam3851cant wait for it’s end really..

[@matthias916]

pithon

[@jan-lukas]

Did python 1 stop with 1.414?

[@Liam3851]

@@jan-lukas 1.6.1. Golden ratio!

[@foobar8894]

Only two more to go until we can start calling it πthon...

[@con-f-use]

1:52 and it used to be that you coudln't use backslashes in f-strings. Which bit a lot of people in the backside.

[@stonemannerie]

As an NVIDIA Jetson which shipped Ubuntu 20.04 (i.e. python38) and lots of proprietary NVIDIA libraries which only have python binding for 3.8, I start sweating at the thought of 3.8 being dropped next year.

[@cleverclover7]

you're not alone

[@volbla]

Let's update them 🙂

[@Squeemos]

I know exactly what you mean. As much as I love the new features of updates to python I get really worried the closer 3.8 gets to being dropped haha. Too many things would stop working for me :(

[@SuperGrimmy]

You'd probably be fine for a couple more years until 2025 when ubuntu 20.04 LTS standard security maintenance also runs out. Probably Nvidia calculated it based on that. That's definitely within reason. Most consider a newly deprecated python version to have year or two more in them in enviroments like that.

[@tuberroot1112]

@@volbla "Let's update them ". Let us .... ? That will be you and who else picking up the burden of the massive work load imposed by the lamers at Python constantly doing non compatible "upgrades" and breaking everything in sight?

[@Danyaaaaaaaaaaaaaaaaaa]

The new generic type syntax is sooo welcome

[@cougar2013]

Please let the 3.14 release be called “Pi-thon” 😂

[@cardboard952]

uyese

[@Ballrock30]

Hi James, if you are gathering points for a new "Nooby Python habits" video, I might have one. Not sure if I missed it in the list or it is just so stupid that you did not think about it. In most of my codes I initialized instance attributes as class attributes instead of initializing them in the __init__() method. Mainly to make the code shorter and more readable. I mean, sure... Those are shared by all instances of a class, but if they are immutable objects they work like instance attributes. I realized my very stupid nooby habit when I created mutable objects (list and dict in my case) which is then shared between all instances. I think for newcomer this behavior is not quite obvious and can lead to silent misbehavior. I thought it is worth mentioning. Thank you for your great videos. Even considering the statement above, I'd say they made me a quite good Python dev :)

[@nocturnomedieval]

Would like to hear more about your other preferred utils. How is batched implemented over an unindexed object, does it cast to a list or uses a generator ?

[@pranavbhamidipati8609]

Generator. Unlike batched_even which needs the iterator length, batched does not

[@Tomyb15]

The buffer protocol is nice. Many times I've come across functions in the standard library that say they work with anything that implements the buffer protocol, when it's C api only and only bytes and bytearray implement it. Not that useful but kinda nice.

[@Terra_135]

10:15 PUBLIC STATIC VOID MAIN STRING ARGS 🗣‼

[@rursus8354]

10:26: C++ typing is a good thing! Typing has the two purposes of 1. helping the programmer catch errors, 2. creating an efficient compiler producing lightning fast machine code (if the programmer chooses to). If the answer on purpose 2. is "use another language" then Python isn't that language.

[@calum.macleod]

"and python 3.8 has a year to go so I can start pushing clients to upgrade to 3.9" :D

[@southernsunreviews5932]

On types or dictionary question you asked about. In c# we have enums that you r able to cast the value or str. And values could change depending on what the enum is used for. Then you want to use kwargs because you don't know how the structure changed. Like in reflection scenarios. Thanks great update And you explanation about square and override is a nice explanation of polytechnic methods if they were wondering how polymorphism relate back to real life scenarios instead of foo

[@sethdhanson]

Been waiting for a 3.12 take from mCoding. Awesome!

[@cleverclover7]

8/10 video. im gonna start using itertools batched. f string stuff was annoying having to use different quotes, etc. kinda wish single-quotes in python weren't a thing.

[@michaelflynn6952]

I just wish they did something different than double quotes, feels like wasted opportunity to make two characters do the same thing

[@RokeJulianLockhart.s13ouq]

​@@michaelflynn6952Yeah. Almost every other scripting language has different handling for the two characters.

[@danmar007]

Finally!!! I've been waiting for this to start learning Python.

[@codegeek98]

2:05 spooky, I literally just got bit by that this morning; I had no idea that's being/been addressed

[@lawrencedoliveiro9104]

10:14 That would need a “@final” decorator on the base class method. No doubt that will be coming ...

[@peco_17]

Actually, @final is already in the `typing` module since python 3.8 ;)

[@lawrencedoliveiro9104]

@@peco_17 Ha!

[@Creadeyh]

Is the debugger improvement applied to the integrated vscode debugger or do you have to use the sys.monitoring yourself ? Sorry I don't really know how debuggers work internally

[@WesYarber]

Bump

[@volbla]

I also have had to write my own batched function. Since itertools has pairwise you might think it should also have an n-wise, but not so until now.

[@notplancha131]

0:47 is (float, int) here mean that T will be a tuple, or will it be either a float or int?

[@tomasbernardo5972]

Can't wait for python 3.14, python π

[@georgplaz]

as someone who learned programming with java, the new generics make me so happy 😊

[@gautam-narula]

Getting ready for the next billionaire to be someone who made “don’t Java my Python” bumper stickers

[@thomasbates9189]

How did you learn about all the python language features you currently know how to use and what motivated you to learn them? Many times I watch your videos and I see you use something that I wasn't aware of before like __slots__ and other items like that.

[@l3gacyb3ta21]

woa! I love the static typing stuff

[@NithinJune]

Love this form of video with the ratings! Very engaging...

[@bswck]

one of the best updates ever

[@sehaless]

Not that I have a use case for it, but I am curious. How do immortal objects actually work? Is there a way from within python to mark an object as immortal or is that fully up to the C implementation to handle - so only code that is partially C can benefit from it atm?

[@prawnydagrate]

man you are literally the best python programmer i've ever seen

[@MrAlanCristhian]

Override is my favorite. I love it.

[@hglbrg]

Finally a youtuber who knows how to pronounce et cetera properly. You deserve a like just for that.

[@betterinbooks]

new way of creating types is a huge change.

[@norude]

Static type gang here 👇

[@recoder706]

Looking forward to 3.14 version. I hope they gonna call it Pi-thon

[@IterativeTheoryRocks]

Marvellous. Loved it.

[@trag1czny]

Great vid as always 🎉

[@bswck]

discord gang 🤙

[@joshuaraciti]

Can’t wait for Py 3.14

[@felixfourcolor]

The generic typing is the best! I'm disappointed of the performance though. 3.11 vs 3.10 was a clear upgrade, while 3.12 barely changes, some programs run even slower.

[@LambdaCreates]

Python 3.14 will be the Pi update.

[@rasputunga]

`batched` function is GOAT

[@seifenspender]

These changes all sound amazing.

[@curtmcd]

Good stuff. Generics have come a long way. Now we need currying. Nits: is that min_max generic at 0:13 supposed to return triples? And at 0:49 shouldn't it return self.seq[item] or something?

[@FrederikSchumacher]

Currying has long been in Python: functools.partial or functools.lru_cache

[@lawrencedoliveiro9104]

We already have function factories and class factories. What more do you need?

[@wizpig64]

Love your music by the way

[@SniperMayer]

I really hope 3.14 will be named Pithon

[@plagosus]

I'll be waiting for 3.14

[@danielgysi5729]

I can't decide if a smaller update like this with less new syntax is refreshing or boring

[@bearwolffish]

wonderful update

[@nikhildaram3354]

Streamlit is not available in python 3.12

[@SourabhBhat]

For me the new Generic syntax and @override is 10/10. The generic syntax would have made it easier for me to read though!

[@FrederikSchumacher]

You are aware that anything in Python is a generic? "def foo(bar)" means bar is generic (as is the return value). It's not untyped either, because of "object" being the base for all Python values? There's only limited amount of usefulness in something like "[X where Parent]" as documentation.

[@lawrencedoliveiro9104]

I think the C++ syntax was stupid. And it still doesn’t let C++ (or Java, for that matter) expression Python concepts like function factories and class factories.

[@SourabhBhat]

@@FrederikSchumacher Yes. Python is too generic, which doesn't allow to express the intent of the programmer. The generic specification is just a hint for IDEs to check the sanity of the code. For example, a class of type T, has methods that adhere to the same type T.

[@BosonCollider]

Immortal objects would be a no-op in pypy. Refcounting is just inherently ugly if you care about performance at all. I wish that python3 had just dropped refcounting and used a proper GC in python.

[@sabihass5361]

Thank you!

[@19DonCorleone87]

Thank you for the summary. It was super useful. The rating at the end of ever ysection feels kind of subjective and arbitrary.

[@carnap355]

What's "type variable"?

[@MephistoDerPudel]

Immortal objects may be useless to most projects, but for those, for which it is a problem, it may resolve a bit PITA.

[@JellyFoxYT]

I don't really understand the type params section. Can someone explain it?

[@my_master55]

My crazy mind though mathematicians just dropped a new Pi value 😭😂

[@k98killer]

I don't get why you would type hint kwargs that way instead of just type hinting the named kwargs after the "/, *," in the function signature, e.g. "def thing(self, /, *, kwarg1: int, kwarg2: str)"

[@fieldtm1able]

When can we get 3.14thon?

[@ivancota9762]

Can't wait for 3.14 - Python Pi 😊

[@mattlau04]

I was waiting for release really patiently, the new type syntax and f-string syntax are such amazing changes

[@lollol-ih7pb]

Hey question how do u get this app like the same ui and stuff because i have to use windows terminal

[@felixfourcolor]

looks like vscode to me

[@CppExpedition]

Best reviewer 🎉 :)

[@Jeyekomon]

It would be awesome if you made a video about generic functions!

[@lukekurlandski7653]

I love python type hints, but not gonna lie, without rigorous type checking, I’m skeptical whether this kind of “advanced” typing is actually useful…

[@_-_--_]

great video. thank you

[@dailynarative]

im strugle to find pyaudio for this version of python3.12

[@jadencorr6897]

kwargs typing is useful for framework-like code. Because it is not obvious which parameters are accepted by **kwargs.

[@IamusTheFox]

Wow, python has changed a lot. I learned 3.1 and haven't had a reason to keep in the last few years

[@hellohabibi1]

They are basically copying TypeScript and changing the design a bit.

[@twentytwentyeight]

Feeling like the error message update has been a long time coming, wonder if rust launching with readable traceback added to the push

[@therealjannis12]

Do they rename Python to PIthon at Version 3.14?

[@lawrencedoliveiro9104]

3:04 Having recently converted an application away from WSGI to ASGI instead, I could care less about things that might improve WSGI behaviour. WSGI is Python’s answer to PHP. ASGI goes beyond that, to let Python do things (like handle WebSocket connections) that PHP cannot.

[@minecraftermad]

Will it be renamed to pithon in 3.14?

[@Vivraan]

10:25 you forgot noexcept(noexcept(L)) lol

[@NoNameAtAll2]

2:03 I don't understand, what's wrong with that? if you want to use same quotes, you have to escape them - seems very reasonable why was this changed? it feels more confuaing now that before

[@Balaji-qq9lc]

I really hope python will be called as Pie-thon when 3.14 is released

[@kareemmika6210]

The new generic type syntax looks like GO. and i love it actually

[@marcinpohl3264]

What about Linux perf support? I'd love to see a good example of it

[@fyellin]

Does immortality mean I can get rid of all the Py_INCREF(Py_None) that are in my code because I'm returning None from a function?

[@Spencer-wc6ew]

Do you have to change the reference count for None anyway? I wrote a C python module a few years ago. And for numbers, I was told to not change the reference count when returning an integer from 0-255, because those are special objects that are never deallocated. It may be the same for None.

[@fyellin]

@@Spencer-wc6ew If you use PyLong_FromLong(x), then you don't need to increment the reference count, because the object you've just received has had its count incremented. But you can definitely crash Python by calling a function that returns `Py_None` without incrementing it. Call sys.getrefcount(None), find None's refcount, and call your function that many times. I assume the same holds true for the small integers, True, False, etc if you save the Python object in a global and repeatedly return it, rather than calling a getter.

[@lawrencedoliveiro9104]

I always set reference counts properly, for None as for everything else. I once wrote a test program that did nothing but decrement the refcount for Py_None until it crashed. I got up to about 512 decrements or so, maybe slightly more.

[@maxgtheone]

Missed a great opportunity to put the Twitter logo at 9:00 haha

[@RichardHamnett]

Can't wait for 3.14 - then we'll have Piithon

[@kirilplatonov4423]

Batched finally here! I no longer have to produce weird magic tricks with iterator multiplication

[@avasam06]

You mentionned setuptools. But not that *distutils* is completely removed from 3.12! setuptool still monkey-patches in its special vendored version. But that means if you never imported setuptools, then imports of distutils will fail.

[@JohnFallot]

Let's gooooo!!!

[@Jake9066]

Python 3.7? Was that the one that made me continue using 3.6 well into its "security updates only" stage?

[@Gordonfreems]

What about the cool new error messages

[@rutabega306]

Yo the next version is 3.14 thats dope

[@HoangoKidZero]

Hmm... A video on Python 3.12 with a slightly over 12-minute runtime :D

[@rodrigof.5956]

Just two versions left

[@konpet4248]

Python 3.7 is now deprecated, huh? Feels weird, since that's the version I started coding on. But ofc it needed to go eventually. Other than it having a special place in my heart, there's no point in holding onto it

[@danielschmider5069]

3:13 its PEP six- eighty-four, not fourty-eight!

[@secondengineer9814]

It's wild how much static typing has been added to a dynamically typed language

[@FrederikSchumacher]

Fortunately, that stuff is still only "type annotations". Meaning, the interpreter, runtime and compiler doesn't do any checking beyond "must be valid Python expression". Which means you can do things like: def tricky_function(tricky_argument: "Beware of using dict[str, Movie] here, it breaks") -> "Mostly None, but List[Movie] on Sundays": pass And it's valid Python.

[@tuberroot1112]

Can't wait for Python v 3.14159 running on Raspberry pi.