20
pyo3 async runtime (lemmy.physfluids.fr)

Hello,

I am trying to wrap some Rust code that uses sea-orm compiled with "runtime-tokio-rustls" feature. I am using the new pyo3 "experimental-async" feature, which AFAIK is based on pyo3_async.

So I get that this is supposed to be runtime-agnostic, and not have two event loops, one for python async and one for rust async.

But, how do I tell pyo3 to use tokio runtime specifically? Or, how do I set up Python asyncio eventloop to use tokio somehow?

Indeed, it seems that it does not use tokio runtime, so I get this error when I invoke the rust async function from Python:

pyo3_runtime.PanicException: this functionality requires a Tokio context
11
Cargo env file? (lemmy.physfluids.fr)

Hello,

I have a project for which some machines have only a subset of features set. Currently, I write

cargo run --no-default-features --features "toto,titi" --bin my_bin

This is a bit cumbersome and I sometimes forget the --no-default-features --features part. I was wondering if there is a local config file that I could put in the directory to instruct cargo to use this particular subset of features. I guess this should be in the documentation, but I didn't find it.

[-] japps13@lemmy.physfluids.fr 8 points 5 months ago

Thank you very much for your reply. I have tried the approach you explain in your blog post, and it works. Your blog post is useful and clearly written !

22
Link against external DLL (lemmy.physfluids.fr)

Hello,

I am trying to use the SDK provided by the manufacturer of a camera from Rust. I use this in the build.rs :

println!(r"cargo:rustc-link-search=C:\Program Files\Digital Camera Toolbox\Camware4");
println!("cargo:rustc-link-lib=SC2_Cam");

However, it tries to find a .lib file, while the actual file is SC2_Cam.dll. I’ve tried specifying the kind as dylib=SC2_Cam but it makes no difference.

Am I missing something obvious, or is it just not possible? Do I have to manually load the DLL at runtime with things like the libloading crate?

[-] japps13@lemmy.physfluids.fr 13 points 8 months ago

At equilibrium, I’d say yes.

[-] japps13@lemmy.physfluids.fr 6 points 9 months ago

I think I once read that when the metric system was first defined during the French Revolution, they also tried to use a decimal system for time, but that was quickly abandoned.

11

Hello,

In the recent years, I have had much less time available to watch new shows (I have a young kid). So I am quite lagging behind: I haven't seen PIC, nor the last season of DIS, nor SNW. I tended to not find the right moment to read books either. I finally started reading e-books and I realise how convenient they are to take advantage of 15 minutes of calm and discretly (and without noise) read a chapter or two. I used to read books on paper exclusively, and to find reading on screen difficult, but it turns out that I am now becoming an e-book reader and they allow me to spend much more time reading.

So, I've started with Robinson's Stitch In Time because I heard a lot of good reviews. And it is indeed GREAT. Beautifully written. I wanted to read more, so I looked up what else Robinson had written, and bought "Prophecy and change Anthology". I read it entirely though I was initially interested only in "The Calling". But I was a bit disappointed as I found "The Calling" too esoteric for my liking. Nevertheless, I was eager to read more about Garak. So I bought and read "Enigma Tales" by Una McCormack, and it is AWESOME! Very well written. I like her writting style.

I am aware that I am not reading in the proper order, but I then decided I wanted more from Una McCormack, so I read "The Fall: Crimson shadow". But I decided to read The Fall in order, so I read Revelation and Dust before. I liked "Revelation and Dust" much much less than Enigma Tales. The writer style is quite heavy, especially when it comes to describing female characters. But it was OK. "Crimson shadow" was AWESOME. I found the description of the transition towards democracy on Cardassia, and the challenge with the facist old guard trying to take back control by various demagogical means very well written. And with a lot of references to real world issues: Starfleet leaving Cardassia somewhat reminiscent of western forces leaving occupied countries in the middle east, the fascist rethoric of Cardassia First reminiscent of some policians IRL. This is SF like I like it: the reader escapes into the Star Trek world, and at the same time is invited to reflect on IRL issues (a bit like Persian letters).

I was less impressed by the rest of the mini-series. The shenanigans on Andor were ok and I finally longed for the characters. But the conspiracy inside the Federation with the moustache-twirling villains that are Velk and Ishan made little sense to me. How could it be that the Federation which has existed for so long has so little counter-powers? How could an unelected person (president pro tempore) be allowed to wield that much power and make decisions without democratic oversight? Why do so many Starfleet personnels obey direct orders if this is illegal to do so? Why not telling him that he isn't authorized to issue them direct orders if that is so?

The shenanigans made sense on Cardassia which was a military dictatorship for at least a century. It made sorta sense on Andor because of what they endured in their recent past and the dangers for their survival (though it was already far fetched that people would be so uninformed after 200 years in the Federation). To top it up, the last book (poisoned chalice) is much too predictable. You know the answer basically after the first few pages, and the story is just lagging. It almost felt like the author is just trying to fill pages (though I was still willing to keep reading until the end). There is also (I don't remember in which books in the mini series) all this discussion about Kira in the wormhole and things she experience there, but it is an unused Chekov gun. There are chapters about her, and then nothing.

So my question is: what to read next? What are good series worth reading? Are there more featuring Garak? Is there a book with Kira coming back from the Wormhole? Do we get to see Crusher under Captain Ro on DS9?

As I stated in introduction, I haven't been able to keep up with the new shows, and I don't want to get spoilt. So, I'd rather not go with books taking place after the events of PIC until I have had to opportunity to watch the shows (unless they don't spoil anyway).

Any advice?

[-] japps13@lemmy.physfluids.fr 9 points 1 year ago

Fascinating. I heard something similar with particle pollution in big cities.

[-] japps13@lemmy.physfluids.fr 19 points 1 year ago* (last edited 1 year ago)

Keep in mind that superconductors have a critical current below which you have to be if you want to stay in the superconductive states. So for a superconductor to be useful for energy transport, this current has to not be tiny. I haven’t had the time to read their paper so I don’t know the value of the critical current. Also if for some reason the current suddenly goes beyond the critical current, the wire will heat suddenly, with possible damage…

[-] japps13@lemmy.physfluids.fr 6 points 1 year ago

My understanding is that they also need low thermal noise to ensure pure states. They cool much below the superconduction threshold temperature (eg typically 20 mK). So I am not sure that this would be useful for quantum computers at the moment. Magnetic field productions such as that in MRI requires high current, so that depends on the maximum current that this material can sustain before that breaks superconductivity. So it could perhaps turn out useful or totally useless. Hard to say at the moment.

[-] japps13@lemmy.physfluids.fr 6 points 1 year ago

I am not advocating for violence. However, it is not historically acurate to say that violence has no benefit. As a matter of fact, I can think of instances in the 18th, 19th and 20th century where violent protestors obtained rights or the end of some kind of oppression. I am not sure I can think of even one instance where anyone got anything without some kind of violence (or destruction of private property), even in the 20th century (there was violence in the May 1968 protests, or in the 1936 strikes, etc). The term "sabotage" itself has something to do with workers destroying the workshops by throwing their shoes (called "sabots") into the machine.

[-] japps13@lemmy.physfluids.fr 14 points 1 year ago

Riots like these are what you get when you prevent any other forms of protests: banning protests (illegal but by the time you get through court to get the ban lifted it is too late), making unions and strikes irrelevant by never ever yielding, preventing votes in the National Assembly using pressures on MP and all that the means that our constitution allows to bypass parliament, even though there is no clear majority for whatever you are doing, forcefully removing peaceful protestors, etc There are reasons why unions was good for everyone, elite class included, they allow peaceful resolution of conflict. If you remove all peaceful avenue, there will be people going into the not peaceful avenue.

[-] japps13@lemmy.physfluids.fr 10 points 1 year ago

I am a scientist myself, and I know what the HCERES says about his institute, and also that his institute no longer had support of the CNRS, which is telling considering that the CNRS only very rarely make such moves, as well as editors no longer accepting his papers leading him to create his own self serving journals. My issues with him are his lack of scientific rigor and lack of scientific ethics. Unfortunately, he's staining the community as a whole, even though he lost support of several scientific institutions long before the Covid.

[-] japps13@lemmy.physfluids.fr 21 points 1 year ago

This guy is a shame for us all, French academics… sorry World, please know we’re not all frauds….

[-] japps13@lemmy.physfluids.fr 8 points 1 year ago

And naturally, matrix is federated so you can join rooms of any other instance.

[-] japps13@lemmy.physfluids.fr 14 points 1 year ago

I use Matrix (Element client on iOS) with the extended family and it works well. Most of them are not tech-savvy. I self-host my own Matrix instance because I wanted to have control on where personal pictures were hosted.

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japps13

joined 1 year ago