NEW generic / alias syntax for python 3.12 (PEP 695) (intermediate) anthony explains #561

today we go over the new syntax added in python 3.12 for generics and type aliases!

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[MostWantedracer]

Here's to Anthony: The only guy who's not afraid of opening a browser window in front of you *while recording* and typing something that starts with "P".

[unvergebeneid]

Well I don't know if I like this new syntax but I know I've always hated the weirdly redundant TypeVar syntax.

[rexase]

this is great, very Rust-like

I think they should use <T> for generics

[amirongoogle]

if it is possible, please make a video about variants; thank you.

[BrunoBeltran]

Maybe I've been brainwashed by C++ but I find the new syntax very readable and natural.

[workflowinmind]

5:08 That's the most logical syntax to me, what would you have preferred?

[qexat]

for someone who uses typevars a lot this syntax kinda grew in me tbh…

[NicolasChanCSY]

This change does not look very intuitive...
In addition, now the function signatures become so long when we add type hints, how should we cope with the 80-ish characters per line rule of PEP8? (Yes, I think 80-ish is still better even when we have much wider screens these days)

[bradb]

Looks a lot like Go generics syntax, thanks for the video!

[iliya-malecki]

why is it def f[T: (str, bytes)](x:T):... and not def f[T: str | bytes](x:T):...? i tried the version that is more intuitive to me and it works. Is it not guaranteed to work? whats the deal with the whole thing?

[yorailevi]

At this point, almost all languages are functionally the same with different syntax. everything but maybe rust which can be emulated with robust linter in cpp.

[RoyAAD]

What is the video talking about covariance ?

[BenjaminWheeler]

I like types, yes I do. I like types, how about you?

[ismailbello]

Hi Anthony, nice video as always! would be nice to hear your thoughts on typing.Annotated!

[fuadnafiz]

How do you remember all the syntaxs without any code completion or autosuggesions? 🙄

[blanky_nap]

after watching this video i have only one question: python wtf are you doing?

[calebparks]

Hurray! Good riddance to "from ___future___ import annotations."

[MrYevelnad]

IDK why python implemented generics when its a dynamically typed language. I'm kinda hyped when I first knew this and it is much simpler to implement in 3.12. I play with it a bit and came to a conclusion that it is pretty much useless in python.

[mailoisback]

No performance gain, just useless syntax stuff that is littering Python.