Language Selection

English French German Italian Portuguese Spanish

Python and GNOME/GTK Programming

Submitted by Roy Schestowitz on Wednesday 3rd of July 2019 05:05:30 AM Filed under
Development
GNOME
  • Functional Programming in Python

    In this course, you’ll learn how to approach functional programming in Python. You’ll start with the absolute basics of Functional Programming (FP). After that, you’ll see hands-on examples for common FP patterns available, like using immutable data structures and the filter(), map(), and reduce() functions. You’ll end the course with actionable tips for parallelizing your code to make it run faster.

  • Episode #137: Advanced Python testing and big-time diffs
  • PyCoder’s Weekly: Issue #375 (July 2, 2019)
  • PyCharm: What We Did At PyCon 2019: A Wrap-up

    PyCon 2019, Cleveland…heck of an event and kudos to Ernest Durbin for a most memorable edition in his delightful city.

    We at PyCharm did some memorable things at PyCon, with some weird ideas that turned out nicely. Some time has passed: let’s do a retrospective.

  • DjangoCon US 2019 Schedule Is Live

    We are a little over two months away from DjangoCon US in San Diego, CA, and we are pleased to announce that our schedule is live! We received many excellent proposals, and the reviewers and program team had a difficult job choosing the final talks and tutorials. Thank you to everyone who submitted a proposal or helped to review.

  • Constraint layouts

    Systems of linear equations can have one solution, multiple solutions, or even no solution at all. Additionally, for performance reasons, you don’t really want to recompute all the solutions every time.

    Back in 1998, the Cassowary algorithm for solving linear arithmetic constraints was published by Greg J. Badros and Alan Borning, alongside its implementation in C++, Smalltalk, and Java. The Cassowary algorithm tries to solve a system of linear equations by finding its optimal solution; additionally, it does so incrementally, which makes it very useful for user interfaces.

    Over the past decade various platforms and toolkits started providing layout managers based on constraints, and most of them used the Cassowary algorithm. The first one was Apple’s AutoLayout, in 2011; in 2016, Google added a ConstraintLayout to the Android SDK.

    In 2016, Endless implemented a constraint layout for GTK 3 in a library called Emeus. Starting from that work, GTK 4 now has a GtkConstraintLayout layout manager available for application and widget developers.

    The machinery that implements the constraint solver is private to GTK, but the public API provides a layout manager that you can assign to your GtkWidget class, and an immutable GtkConstraint object that describes each constraint you wish to add to the layout, binding two widgets together.

  • Pitivi – Making a Nest

    Pitivi is an open source video editing software for Linux. It provides creatives with a simple and elegant interface to edit and bring their videos to realisation. As with every other great software, Pitivi’s development community is always striving to add newer and better features. This year I participated in the Google Summer of Code to add the ‘Nesting’ Feature to the platform. I am currently working on this with my mentor Thiblahute Saunier. In this blog I chart out our current progress and the future tasks at hand.

    [...]

    In the past few weeks I’ve learnt and improved a lot. In the beginning I was a bit reserved and shy to tell my problems but after talking and getting to know my mentor, I think I’ve overcome that fear. The guidance of my mentor has been crucial in this journey. Until now he has done all of the heavy-lifting for the back-end all the while helping me to get up to speed. Hopefully now I will be able to take the reins and at the same time be able to learn more from him. I look forward to an amazing summer and the work we have in front of us.

  • Removing rsvg-view

    I am preparing the 2.46.0 librsvg release. This will no longer have the rsvg-view-3 program.

    [....]

    Rsvg-view requires GTK. But GTK requires librsvg, indirectly, through gdk-pixbuf! There is not a hard circular dependency because GTK goes, "gdk-pixbuf, load me this SVG file" without knowing how it will be loaded. In turn, gdk-pixbuf initializes the SVG loader provided by librsvg, and that loader reads/renders the SVG file.

    Ideally librsvg would only depend on gdk-pixbuf, so it would be able to provide the SVG loader.

    The rsvg-view source code still has a few calls to GTK functions which are now deprecated. The program emits GTK warnings during normal use.

»

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.

More on Tux Machines: About ● Gallery ● Forum ● Blogs ● Search ● News ● RSS Feed

Part of Bytes Media ● Sister sites below.

TechBytes Techrights button

Powered by Drupal, an open source content management system

Content available under CC-BY-SA CC

© by original authors

Powered by CentOS 6.5 (GNU/Linux), Varnish, and Drupal 6