What's New in Python 3.11?

Re:What's New in Python 3.11? by kortex on Monday June 27, 2022 @12:06AM (#31890475)

For me, type annotations has been the single biggest ergonomics improvement to come to python. It's a very simple type system compared to many other languages (definitely simpler than rust, haskell, scala, java, and c++, I find it easier than go's generics but I am not practiced). I don't see how they add complexity to the language. In fact I find it limiting if anything.

Walrus is...fine. I don't use it much, but I defo see how it's one more thing.

Python's biggest complexity, imho, is its almost unrivaled dynamicism. There's just too many degrees of freedom at times.

The import system continues to be a nuclear footgun. I consider myself a python expert with 15 years under my belt and today I was still fighting with imports in a pytest suite. Like wtf.

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Re:What's New in Python 3.11? by RugnirViking on Monday June 27, 2022 @03:30AM (#31891593)

my main issue with the typing is circular imports, and how ultimately for a lot of configurations the best solution is to just skip the typing that one time. Even "if type_checking:" often simply can't cut it

I want to be able to use typing everywhere if I'm going to use it, it really grinds when I have to selectively not use it.

That being said, im glad typing is in the language :)

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Re:What's New in Python 3.11? by kortex on Monday June 27, 2022 @08:57AM (#31893923)

Configuration hoisting and library layout to avoid circulars is tricky. The way I structure my libs, lets say ./foo is my main lib, I'll have ./foo/types/.py with most of my primary schema models (I use Pydantic heavily). Then ./foo/config/.py manages application config. Basically everything is pulled in with env vars / config files - I rarely use CLI flags for application-level global configuration - the rest are passed in to entry point functions.

What this means is I can import my AppConfig class anywhere (except types and config submodules) without circular imports, construct them, and they will be initialized with the configs from the env.

Occasionally I have to bust out ForwardRef annotations and model.update_forward_refs() but that's pretty rare. Basically, the imports are structured so that it's as close to a DAG as possible.

Definitely check out pydantic, it makes it really easy to do 12-factor style application config.

I haven't done a lot with CLI-flag global config, but if I had to, I'd use something like dependency-injectors to wire it all together.

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Re:What's New in Python 3.11? by kzrdude on Monday June 27, 2022 @05:15AM (#31892228)

The official solution to this is to just use strings. I.e instead of Type, use "Type" where Type can't be in scope because of circularity.

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Re:What's New in Python 3.11? by selcuka on Monday June 27, 2022 @03:40AM (#31891655)

> my main issue with the typing is circular imports

FYI: You can use strings as a workaround, or the

    from __future__ import annotations

trick.

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