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Programming/Development: Dirk Eddelbuettel, Dependencies and Python

Submitted by Roy Schestowitz on Sunday 8th of December 2019 02:26:52 AM Filed under
Development
  • Dirk Eddelbuettel: RcppArmadillo 0.9.800.3.0

    A small Armadillo bugfix upstream update 9.800.3 came out a few days ago. The changes, summarised by Conrad in email to me (and for once not yet on the arma site are fixes for matrix row iterators, better detection of non-hermitian matrices by eig_sym(), inv_sympd(), chol(), expmat_sym() and miscellaneous minor fixes. It also contains a bug fix by Christian Gunning to his sample() implementation.

    Armadillo is a powerful and expressive C++ template library for linear algebra aiming towards a good balance between speed and ease of use with a syntax deliberately close to a Matlab. RcppArmadillo integrates this library with the R environment and language–and is widely used by (currently) 679 other packages on CRAN.

  • Dirk Eddelbuettel: RDieHarder 0.2.1

    A new version, now at 0.2.1, of the random-number generator tester RDieHarder (based on the DieHarder suite developed / maintained by Robert Brown with contributions by David Bauer and myself) is now on CRAN.

    This version has only internal changes. Brian Ripley, tireless as always, is testing the impact of gcc 10 on CRAN code and found that the ‘to-be-default’ option -fno-common throws off a few (older) C code bases, this one (which is indeed old) included. So in a nutshell, we declared all global variables extern and defined them once and only once in new file globals.c. Needless to say, this affects the buildability options. In the past we used to rely on an external library libdieharder (which e.g. I had put together for Debian) but we now just build everything internally in the package.

  • There are (at least) three distinct dependency types

    Using dependencies is one of the main problems in software development today. It has become even more complicated with the recent emergence of new programming languages and the need to combine them with existing programs. Most discussion about it has been informal and high level, so let's see if we can make it more disciplined and how different dependency approaches work.

    What do we mean when we say "work"?

    In this post we are going to use the word "work" in a very specific way. A dependency application is said to work if and only if we can take two separate code projects where one uses the other and use them together without needing to write special case code. That is, we should be able to snap the two projects together like Lego. If this can be done to arbitrary projects with a success rate of more than 95%, then the approach can be said to work.

    It should be especially noted that "I tried this with two trivial helloworld projects and it worked for me" does not fulfill the requirements of working. Sadly this line of reasoning is used all too often in online dependency discussions, but it is not a response that holds any weight. Any approach that has not been tested with at least tens (preferably hundreds) of packages does not have enough real world usage experience to be taken seriously.

  • Monads aren't as hard as you think

    I’ve been scared of monads ever since I first heard of them. So many references to burritos, or nuclear waste containers, or some other analogy that didn’t make sense to me. So if you’re scared of monads too, maybe my take on what a monad is will help.

  • Print all git repos from a user
  • Print all git repos from a user
  • Talk Python to Me: #241 Opal: Full stack health care apps

    Open source has permeated much of the software industry. What about health care? This highly regulated and important industry might seem to be the domain of huge specialized software companies.

  • Sleepy snake

    I love this drawing! I’ve always been charmed by cartoonists’ ability to capture an essence in a seemingly simple drawing. Objects are reduced to stereotypes, but with some whimsy thrown in. Ben has always had this gift: to create just the right stroke to perfectly express an attitude or feeling.

    Here Sleepy is snug in his bed, covered by a blanket. Even in his custom bed, he’s too long to fit, but he’s comfortable. The pillow isn’t shaped like a real pillow, but it’s exactly our cartoon Platonic ideal of a pillow.

  • Generate a Python Random Number

    Here is a quick guide on Python’s random number. You can always refer to it whenever you need to generate a random number in your programs.

    Python has a built-in random module for this purpose. It exposes several methods such as randrange(), randint(), random(), seed(), uniform(), etc. You can call any of these functions to generate a Python random number.

    Usually, a random number is an integer, but you can generate float random also. However, you first need to understand the context as a programmer and then pick the right function to use.

  • Trigger Local Python App Remotely

    With an old Mac I have lying around at home and free web-based services, I’ve setup a simple app that fetches some data from an external service (YNAB) in order to run some daily budget calculations that I used to calculate manually for a long time. The output of my app is then sent back to my phone within seconds so I can trigger it from anywhere. I wanted to share the approach I’m using which has cost me nothing.

    This (obviously) isn’t an approach that should be used for large scale applications or anything other than pet projects. I just wanted to highlight how simple it can be using existing free tools. There are plenty of low cost, production ready, and scalable options out there (like AWS Lambda) if you prefer to start with that approach.

    My app is written in Python and served via Flask to a local endpoint (http://localhost:5000) which ngrok points to. I then have a IFTTT webhook hitting the Ngrok URL after clicking an IFTTT button widget from my phone. The app ends up broadcasting the output to my Slack account so I end up getting a push notification on my phone containing the app output within seconds of hitting the button:

  • Raspberry Pi Christmas Shopping Guide 2019

    Stuck for what to buy your friends and family this Christmas? Whether you’re looking to introduce someone to Raspberry Pi and coding, or trying to find the perfect gift for the tech-mad hobbyist in your life, our Christmas Shopping Guide 2019 will help you complete your shopping list. So, let’s get started…

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More in Tux Machines

Linus Torvalds Decides To Land NVIDIA RTX 30 "Ampere" Support In Linux 5.11

While new feature code is normally not allowed in past the end of the merge window for a given Linux kernel release cycle, Linus Torvalds has decided to merge the newly-published open-source driver code for the NVIDIA GeForce RTX 30 "Ampere" graphics cards for the Linux 5.11 kernel that will debut as stable in February. Ahead of this weekend's Linux 5.11-rc4 release, Linus Torvalds has merged the new initial open-source code for the NVIDIA RTX 30 / Ampere GPUs via the Nouveau driver. He was fine with allowing this late addition to Linux 5.11 as the new hardware support is all self-contained and doesn't risk regressing the existing NVIDIA GPU support within the Nouveau driver. Thus it's one of the rare times he permits new code to be added after a merge window since there is minimal risk of it regressing the status quo of hardware support. Read more

today's leftovers

  • Minimalist vs Modern - Linux Mint 20.1

    It's time to check out the two desktop environments built for the latest release of Linux Mint 20.1 - MATE and Cinnamon!

  • Google Docs Replacement | Self-Hosted 36

    Our favorite Google Docs killer with markdown support has a big update. We explain how we host it and why we love it.

  • Announcing Istio 1.8.2

    This release contains bug fixes to improve robustness. This release note describes what’s different between Istio 1.8.1 and Istio 1.8.2

  • openSUSE Tumbleweed – Review of the week 2021/02 – Dominique a.k.a. DimStar (Dim*)

    Dear Tumbleweed users and hackers, Somewhere, I read, 2021 will be the year of the Linux desktop. Do you agree? Let’s make it the year of Tumbleweed on the desktop. In any case, Tumbleweed has been steadily rolling with 5 snapshots published during this week (0107, 0108, 0110, 0111, and 0113).

  • Ubuntu 21.04 To Expand The Use Of Phased Package Updates - Phoronix

    With this spring's release of Ubuntu 21.04 there is more widespread use of "phased updates" for gradually rolling out new stable release updates to help avoid any regressions en masse from coming to light. For years the Ubuntu desktop has employed this phased updates strategy while now with it being plumbed into APT, Ubuntu Server and other versions will by default make use of phased updates. Going back a number of years in Ubuntu has been Phased Updates that wired into Update Manager has led to the gradual rollout of new stable release updates over a period of about two days. This has been done gradually to ensure that no regressions or potential big problems hit all Ubuntu users at once by over the course of many hours exposing more Ubuntu users to these updates.

Security Leftovers

  • Security updates for Friday

    Security updates have been issued by Debian (flatpak, ruby-redcarpet, and wavpack), Fedora (dia, mingw-openjpeg2, and openjpeg2), Mageia (awstats, bison, cairo, kernel, kernel-linus, krb5, nvidia-current, nvidia390, php, and thunderbird), openSUSE (cobbler, firefox, kernel, libzypp, zypper, nodejs10, nodejs12, and nodejs14), Scientific Linux (thunderbird), Slackware (wavpack), SUSE (kernel, nodejs8, open-iscsi, openldap2, php7, php72, php74, slurm_20_02, and thunderbird), and Ubuntu (ampache and linux, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-lts-xenial).

  • Project Zero: Introducing the In-the-Wild Series

    At Project Zero we often refer to our goal simply as “make 0-day hard”. Members of the team approach this challenge mainly through the lens of offensive security research. And while we experiment a lot with new targets and methodologies in order to remain at the forefront of the field, it is important that the team doesn’t stray too far from the current state of the art. One of our efforts in this regard is the tracking of publicly known cases of zero-day vulnerabilities. We use this information to guide the research. Unfortunately, public 0-day reports rarely include captured exploits, which could provide invaluable insight into exploitation techniques and design decisions made by real-world attackers. In addition, we believe there to be a gap in the security community’s ability to detect 0-day exploits.

  • Google series on in-the-wild exploits

    The Google Project Zero blog is carrying a six-part series exploring, in great detail, a set of sophisticated exploits discovered in the wild.

OSS Leftovers and Mostly Openwashing

  • Debarshi Ray: Toolbox — After a gap of 15 months

    About a year ago, Ondřej Míchal single-handedly rewrote Toolbox in Go, making it massively easier to work on the code compared to the previous POSIX shell implementation. Go comes with much nicer facilities for command line parsing, error handling, logging, parsing JSON, and in general is a lot more pleasant to program in. Plus all the container tools in the OCI ecosystem are written in Go anyway, so it was a natural fit. Other than the obvious benefits of Go, the rewrite immediately fixed a few bugs that were inherently very cumbersome to fix in the POSIX shell implementation. Something as simple as offering a –version option, or avoiding duplicate entries when listing containers or images was surprisingly difficult to achieve in the past. What’s more, we managed to pull this off by retaining full compatibility with the previous code. So users and distributors should have no hesitation to update.

  • Rav1e 0.4 Released For Faster Rust AV1 Encoding - But Still Is Quite Slow

    Rav1e 0.4 was released on Wednesday as the latest version of this Rust-written AV1 video encoder. The rav1e 0.4 release represents a speed-up for the encoder but depending upon the preset level can still be at fractions of a frame per second. Rav1e 0.4 development was focused on providing faster performance for x86_64 and AArch64 (64-bit ARM) architectures. A wide variety of optimizations made faster performance possible depending upon the speed level.

  • LCA: Catch Talks by OSI Staff and Community

    Linux.conf.au (aka LCA) is a lovely community conference based in Australasia that will be entering its 22nd year in 2021. The volunteer-run event is known for getting deeply technical on topics varying from the inner workings of the Linux kernel to the inner workings of dealing with communities. This year's event takes place on January 23rd - 25th and is accessible is digital and accessible to everyone, whether you live "down under" or not. Our General Manager, Deb Nicholson will be presenting on how to build and maintain kinder, gentler and more sustainable open source communities in her talk, "Move Slow and Try Not to Break Each Other." on Sunday at 11:40am.

  • Data@Mozilla: This Week in Glean: Proposals for Asynchronous Design

    At last count there are 14 proposals for Firefox on Glean, the effort that, last year, brought the Glean SDK to Firefox Desktop. What in the world is a small, scrappy team in a small, scrappy company like Mozilla doing wasting so much time with old-school Waterfall Model overhead?! Because it’s cheaper than the alternative. Design is crucial before tackling difficult technological problems that affect multiple teams. At the very least you’re writing an API and you need to know what people want to do with it. So how do you get agreement? How do you reach the least bad design in the shortest time?

  • Mozilla Performance Blog: Performance Sheriff Newsletter (December 2020)

    In December there were 241 alerts generated, resulting in 39 regression bugs being filed on average 6.4 days after the regressing change landed. Welcome to the December 2020 edition of the performance sheriffing newsletter. Here you’ll find the usual summary of our sheriffing efficiency metrics, followed by a review of the year. If you’re interested (and if you have access) you can view the full dashboard.

  • CIB spins off new allotropia software GmbH

    “With everyone from SMBs to governments now going fully digital, we see significant demand for integrated, secure, and GDPR-conforming digital document lifecycle solutions,” says Uli Brandner, CEO and owner of CIB labs. “We have continuously invested into LibreOffice to play an important role in our solution stack, and are now taking the next step by setting up a dedicated company with a laser-sharp focus on delivering fully cloud-based versions – in-line with our ongoing push for browser-based products. Being able to build on the multi-decade value of existing OpenSource solutions, as well as the equally many years of experience of our LibreOffice engineering team there, gets us both a significant head start, and the confidence to deliver quality solutions.” LibreOffice engineering consultancy and “LibreOffice powered by CIB” will remain an important part in CIB’s portfolio, now being served and further improved by allotropia software GmbH. “For our customers, this generates the win-win-win situation of having an established, rock-solid partner like CIB, delivering state-of-the-art opensource software, plus the agility of an innovative startup developing new solutions”, adds Uli Brandner.

  • Open Source Management & Strategy Training Program Launched by The Linux Foundation
  • Start 2021 Off With a New Career in the Cloud! Cloud Engineering Bootcamps are on Sale
  • Instructor-Led Kubernetes Security Fundamentals Course Now Available
  • Kubernetes Security Essentials Course Now Available
  • New, Free Training Course Covering Basics of the WebAssembly Now Available
  • Tips for Starting Your New IT Career in 2021!

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