Threads for sebst
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Thanks for yet another post! I noticed quite a few more typos this time around though, not sure if I’m the only one bothered by those:
- “VSCode docker containers straight ro production”
- “Learn Kubernetes alon the way”
- “Make sure you chnage the registry accordingly”
There were also multiple instances of casing being off (e.g. “docker container” vs. “Docker container”, “yaml files” vs. “YAML files”, etc.). This isn’t to throw shade on you or anything, I truly appreciate your continued effort in authoring posts.
To anyone else getting started with K8S based tools like
kubectlandhelmI suggest taking a look at Hermit as it makes installing not only those tools but other ones as well dead simple. Here is a list of tools that can currently be installed. I’ve also submitted a PR to adddoctlinto the mix.At work I’ve used Hermit to greatly simplify installing common tooling by removing the requirement that people go through various bits of documentation on various sites to just running, for example,
hermit install gcloud helm kubectl kubectx kubens velero.
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I will plan a trip to California, Santa Barbara, and San Francisco, to be precise. Is anyone up for a coffee? Will be my first trip to the States…
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I’m working on more Python content on my blog and Twitter (https://bas.codes, https://twitter.com/bascodes) and preparing my proposals for DjangoCon Europe
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Just a little nit, but
argsindef fn(*args):will actually be atupleand not alist(so you can’tpushorpopfrom it).-
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I believe it’s also most correct to say that
*works with any iterable and**works with any mapping — that’s a much broader scope of things than justlistanddict.
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This is a great article. Thanks for writing it!
It’s a perfect example of a language feature that many of us use from time to time, but also either don’t or barely understand what’s going on under the hood.
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Clear, concise, to the point. Full marks!
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Traveling to Berlin for PyConDE
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PEP 654 … introduces ExceptionGroups. With them, we’re able to raise multiple exceptions simultaneously
I’m not familiar with the pattern of raising multiple exceptions. What other languages support this? I’m interested to see where and how they become useful.
try: raise ExceptionGroup("Validation Errors", ( ValueError("Input is not a valid user name."), TypeError("Input is not a valid date."), KeyError("Could not find associated project.") )) except* (ValueError, TypeError) as exception_group: ... except* KeyError as exception_group: ...-
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That’s interesting. In Go, I have a multierror that I use to consolidate errors when running concurrent gorountines. Of course, errors are just a normal interface in Go, so it’s pretty easy to just add an Error method to a slice of errors. It doesn’t need any special language support.
I wrote a gist to try to combine Python exceptions once, but it was sort of a kludge. It’s nice that it will be a first class thing now.
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That’s basically what
asyncio.gather()already does, but PEP 654 exists to make the process less cumbersome.
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I don’t think it’s for that use case. Within a single library, you can do:
from typing import List class ValidationError: line_number: int reason: str class ValidationErrors(Exception): errors : List[ValidationError]So based on above discussion it sounds like it’s more about combinations of multiple different exceptions.
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Django’s forms library has something similar; instead of forms having a potential attached error, they have a a potential list of attached errors, produced by catching and collecting every
django.forms.ValidationErrorraised during the validation process. -
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Thanks for yet another wonderful overview! I would love it if you could cover the world of testing in Python as well. I’m struggling to wrap my head around how exactly mocking, monkeypatching, and fixtures intermingle.
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I will help two non-technical people to understand the basics of Python by building a robo car!
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I use a kit by Sunfounder – initially, I wanted to use a micro:bit but my order was not fulfilled.
We use Thonny as IDE.
Didn’t know about Mu, will for sure have a look at this! Thanks!
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What would be a Pythonic way to implement a singleton-ish pattern?
class Borg: _shared_ = {} def __init__(self): self.__dict__ = self._sharedYou may already know this, but that’s not the usual Python way to implement a singleton - usually a singleton is implemented by overriding
__new__. ThisBorgis much less singleton-y because twoBorginstances won’t compare as equal.Also, singletons are bad http://www.object-oriented-security.org/lets-argue/singletons
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There are cases where you need something like a singleton, but the right way to do that in Python is just to have one named instance in a module, and its “singleness” comes from the fact that you are importing foo from bar, and imports are a shared global namespace.
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The enum module in the standard library is one example where that approach to singletons does not work and you need to override
__new__.
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You’re absolutely right: Two borgs don’t compare as equal (using
id(borg_1) == id(borg_2)) but everything inside is the same.My point was not to make a case for singletons (or borgs) as I outlined in the article:
Note that you should use singleton classes only occasionally because they introduce some global state in your program, which makes it hard to test individual components of your program in isolation.
Instead, I wanted to illustrate how Python manages attributes.
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Interesting although I think singletons like this can make unit testing difficult, can’t they?
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Depends on what you want to analyze. I found sentry to be very useful as it gives me insights into Performance and Issues.
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Anybody have ideas why IPv6 adoption is consistently higher on the weekends?
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To the person who marked this comment a troll: Was it my use of “Comcrap” which I’ll admit could be seen as inflammatory? Because I was dead serious. Most of us working stiffs don’t have time to embark on a project like IPV6-ifying our home network except on the weekends when we can afford to screw it up and be down for an hour or two while we google solutions on our phones :)
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Was it my use of “Comcrap” which I’ll admit could be seen as inflammatory?
Yes.
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Thank you for your candor.
I of all people should be more sensitive about tarring employees of large corps with one brush, working for AWS myself and cringing on a regular basis when every Tom, Dick & Harry in the known universe blames me for every bad experience they ever had when the UPS guy spat on their package.
Similarly, you (whoever you are, and assuming you’re a Comcast employee) aren’t responsible for the numerous install and provisioning experiences that left my wife & I ready the climb the walls.
I will sincerely try to be better about this.
For what it’s worth I really appreciate Comcast’s consumer IPV6 rollout. I was able to flip a switch and convert my entire LAN, and everything worked like a charm.
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A simple guess based on my observations in Germany right now: Many people have IPv6 connectivity at home, but not at work. Even many (most?) universites don’t provide IPv6 in their networks, especially on wireless. However, my private ISP does, and so do many others. The situation is similar in Austria, and (to my knowledge in France), so I’d expect it to hold in other places too and probably account much of this difference.
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There’s more IPv6 at home than at work.
Why, I hear you ask. I don’t really know. My theory is that home users tend to get v6 when an ISP decides to upgrades everyone’s DSL/fiber middleboxes, while companies often have more hardware. If any of the hops from my desk to the network is v4-only, then so I am I. Home users wait for an ISP to enable v6, business users wait for all of n hops to enable v6, where n≥1. Even if n is only slightly greater than 1 on average, that will introduce some random lag compared to home users.
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Oddly enough, I’ve heard an anecdote involving that that selfsame name. As you may know, the IPv4 allocation rules were tightened several times at predefined points in time as the End grew near. One of the 2-3 relevant Deutsche Telekom companies was a bit late with requesting more address space from RIPE a while ago, and was one of the first ISPs to have a big address space application rejected.
All of its competitors had enough address space to grow for a while without any v6 deployment hurry, having gotten allocations in just before the rule change, but not Deutsche Telekom.
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animesh
3 years ago
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Show: I've built a social news aggregator for the Python community and it took off
Signed up. Nitpick, but it says Verification successfully instead of Verified successfully.
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itamarst
3 years ago
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Show: I've built a social news aggregator for the Python community and it took off
Cool! Nice to have a Python-specific site that isn’t a sub-Reddit.
@sebst I tried to verify my email and got a 500 error, BTW, so might want to check the logs…
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james
3 years ago
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Show: I've built a social news aggregator for the Python community and it took off
@sebst Do you have a JSON interface like https://lobste.rs/hottest.json ?
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Arc - Bel - what’s next, Cex?
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Arc was released 11 years ago says Wikipedia. So Cex is due in 2030.
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friendlysock
3 years ago
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Show: I've built a social news aggregator for the Python community and it took off
Congratulations! What is your caching story right now–it seems a little slow to revisit some pages?
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narimiran
3 years ago
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Show: I've built a social news aggregator for the Python community and it took off
Congrats, but I have to ask: why such a tiny default font? To be able to comfortably read the contents, I need to have 140% zoom.
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No thanks, that’s quite expensive just to host some side projects. The basic setup with a container registry and a 2 node Kubernetes cluster will cost you 44$/month.
You can start with as little as $12/mo – one node cluster, free tier registry.
That’s true, but I didn’t consider the free tier since it is very limited. Just 1 repository and 500mb of storage, that’s maybe one to two large container(s).