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Python Programming Leftovers

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Programming: Education, Red Hat, and Python

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  • Best Programming Tools for Tutoring Kids

    Have you ever noticed how easily children use TVs, tablets, and other smart devices? It used to surprise me how quick kids are to find their way on smart devices not any longer because I now understand that such operations will be like their second nature because it is the era they have been born into – technology. In light of this information, it is never too early to start introducing them to computing and programming concepts.

    The world’s advancement is partly dependent on technology and you can never tell how useful the skills they develop from playing programming-inclined games and reading related material will be to them.

  • Red Hat Developer Toolset 8.1 Beta now available

    Red Hat Developer Toolset augments Red Hat Enterprise Linux with the latest, stable versions of GCC that install alongside the original base version.

  • Red Hat Software Collections 3.3 Beta: New and updated components

    Red Hat Software Collections supply the latest, stable versions of development tools for Red Hat Enterprise Linux via two release trains per year. We are pleased to introduce three new and two updated components in this release, Red Hat Software Collections 3.3 Beta.

  • Red Hat Extensions for Microsoft Visual Studio Code receive 3.8 million installs

    Since the introduction of open source more than 20 years ago, software development has undergone significant shifts. Open source development has enabled new programming languages (see Go, Rust, etc.); and as a result, IDEs that are designed to be used with multiple languages are increasingly useful. In addition, enterprises can feel mounting pressure to compete in the digital economy, which can increase developer requirements to produce more microservices and cloud-native applications - and doing it faster. The ability for developers to optimize use of their favorite tools can be essential towards improving developer productivity.

  • Tutorial: Text Classification in Python Using spaCy
  • Sum the factorial of a list object with python
  • Reverse a number with Python
  • Selenium Using Python: All You Need to Know
  • Introduction to Generators in Python
  • Catalin George Festila: Update python modules of 3.73 version.
  • Testing metrics thoughts and examples: how to turn lights on and off through MQTT with pytest-play

    In this article I'll share some personal thoughts about test metrics and talk about some technologies and tools playing around a real example: how to turn lights on and off through MQTT collecting test metrics.

    By the way the considerations contained in this article are valid for any system, technology, test strategy and test tools so you can easily integrate your existing automated tests with statsd with a couple of lines of code in any language.

    I will use the pytest-play tool in this example so that even non programmers should be able to play with automation collecting metrics because this tool is based on YAML (this way no classes, functions, threads, imports, no compilation, etc) and if Docker is already no installation is needed. You'll need only a bit of command line knowledge and traces of Python expressions like variables["count"] > 0.

  • Python's dynamic nature: sticking an attribute onto an object
  • How to Work With a PDF in Python

    The Portable Document Format or PDF is a file format that can be used to present and exchange documents reliably across operating systems. While the PDF was originally invented by Adobe, it is now an open standard that is maintained by the International Organization for Standardization (ISO). You can work with a preexisting PDF in Python by using the PyPDF2 package.

Qbs 1.13 released

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We are happy to announce version 1.13.0 of the Qbs build tool. This is the last version to be released under the auspices of the Qt Company, but certainly not the least.

Qbs projects can now make use of pkg-config modules. Syntax-wise, the same dependency mechanism as for Qbs’ own modules is used. For instance, on a typical Linux machine with an OpenSSL development package installed, the following is enough to let a Qbs project build against it...

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Eclipse IoT survey reveals growing role for Linux and Arm

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The Eclipse Foundation released the results from its latest IoT Developer Survey of 1,717 Eclipse developers, finding growing use of Linux (76 percent), Arm (70 percent), and MQTT (42 percent).

The results of the Eclipse Foundation’s 2019 IoT Developer Survey are out, this time with a larger 1,717-developer sample compared to only 502 in the 2018 survey. The survey was conducted by the Eclipse IoT Working Group in cooperation with member companies including Bosch Software Innovations, Eurotech, and Red Hat. The Eclipse Foundation’s various social media channels and websites promoted the survey, as did Eclipse IoT member companies.

The survey was not limited to embedded developers. Two out of three respondents said their organizations are either deploying Internet of Things solutions now or will do so in the next 18 months. Some projects appear to be longer-range than that considering that 80 percent of respondents said they are active in IoT work.

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Qt/KDE: KDE Plasma 5.16 Pre-Beta and Qt Creator 4.9.0

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  • KDE Plasma 5.16 Pre-Beta Run Through

    In this video, we are having a look at the pre-Beta version of KDE Plasma 5.16. It still have a few bugs but it is expected.

  • Qt Creator 4.9.0 released with language support, QML support, profiling and much more

    Yesterday, the team behind Qt released the latest version, Qt Creator 4.9.0, a cross-platform software development framework for embedded and desktop applications. This release comes with programming language support, changes to UI, QML support and much more.

  • Qt Creator hits 4.9 with ever-growing language skills

    Qt Creator 4.9 has been released, extending support for the language server protocol and improving diagnostics for C++ developers.

    The language server protocol was added in version 4.8 but can now work with document outlines, find usages and – using code actions – lets the language server suggest fixes or refactoring actions at a specific place in a piece of code. The custom highlighting file parser, meanwhile, has been replaced with KSyntaxHighlighting – the library also used in KDE.

    Another slew of changes improve C++ support, with – amongst other things – an option to format code instead of only indenting it, a tooltip button for copying and ignoring diagnostics, and an option to synchronise ‘Include Hierarchy’ with the current document.

  • Qt Creator 4.9 uses KSyntaxHighlighting

    As you can read in the official Creator 4.9.0 release announcement, Qt Creator now uses the KSyntaxHighlighting Framework for providing the generic highlighting.

    This is a nice step for the wider adoption of this MIT licensed part of the KDE Frameworks.

    And this is not just an one-way consumption of our work.

    The framework got actively patches back that make it more usable for other consumers, too, like Kate ;=)

Programming: Rust, Education, PHP, Red Hat Propping Up MSVS and More

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  • This Week in Rust 282
  • US Schools Must Implement Coding Into Their Curriculum

    The integration of coding into a school’s curriculum has become all the more important with the advancement of technology.

    Despite an awareness for an increase in coding attainment, the implementation of computing and coding resources into classrooms has faced numerous challenges. In large part, this is due to a lack of engaging resources that support STEM learning in practical ways, according to Ricky Ye, CEO of DFRobot.

    “Recently, we have witnessed greater emphasis on STEM learning and as a result, more and more primary school are implementing coding into the curriculum however, it is essential to ensure that these classes are continued throughout secondary schools as well,” said Ricky Y.

  • The Linux Foundation forms new Laminas project to support continued growth of Zend Framework and PHP tooling

    In conjunction with Zend Technologies and Rogue Wave Software, we are excited to announce that the Zend Framework is transitioning to the Linux Foundation and will launch later this year as a new project called Laminas.

    The Zend Framework is a collection of professional PHP packages that can be used to develop web applications and services using PHP 5.6+, and it provides 100% object-oriented code using a broad spectrum of language features.

    Over the years, the Zend Framework has seen wide adoption across industries and application types with more than 400 million lifetime installs. It is used by companies including the BBC, BNP Paribas, and It has formed the basis of numerous business applications and services including eCommerce platforms, content management, healthcare systems, entertainment platforms and portals, messaging services, APIs, and many others.

  • At 3.8-million installations, Red Hat extensions help developers with VS Code, Language Servers, and microservices

    Back in the early days of 2016, together with a few fellow Red Hatters who were primarily working on implementing IDEs, my team was looking for new architectures that would give different communities, such as programming languages, runtimes to integrate easily with IDEs without a deep knowledge of the IDE itself. As our experiments continued, the development team at Microsoft open sourced the Visual Studio Code (VS Code) and introduced the Language Server Protocol (LSP).

  • Continuous Delivery and Continuous Deployment: Keys to the DevOps Revolution

    Continuous delivery and continuous deployment are two core concepts at the foundation of modern software development practices and the broader DevOps movement. These methods greatly boost the speed and efficiency of software development – which is greatly needed in today's cloud computing era.

    The so-called Waterfall method of development, where developers work for months building code that is eventually ready for release doesn't work in the modern world, where Software-as-a-Service (SaaS) is the norm. Instead, agile methods of rapid code iteration – focusing on continuous development and deployment – is the approach favored by modern application development.

  • How to Get Current Date and Time in Java

    There are multiple ways to get the current date and time in Java programming language. Here we will discuss two ways using java.util.Date and java.util.Calendar Classes.

The Ecuadorean Authorities Have No Reason to Detain Free Software Developer Ola Bini

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Hours after the ejection of Julian Assange from the London Ecuadorean embassy last week, police officers in Ecuador detained the Swedish citizen and open source developer Ola Bini. They seized him as he prepared to travel from his home in Quito to Japan, claiming that he was attempting to flee the country in the wake of Assange’s arrest. Bini had, in fact, booked the vacation long ago, and had publicly mentioned it on his twitter account before Assange was arrested.

Ola’s detention was full of irregularities, as documented by his lawyers. His warrant was for a “Russian hacker” (Bini is neither); he was not read his rights, allowed to contact his lawyer nor offered a translator.

The charges against him, when they were finally made public, are tenuous. Ecuador’s general prosecutor has stated that Bini was accused of “alleged participation in the crime of assault on the integrity of computer systems” and attempts to destabilize the country. The “evidence” seized from Ola’s home that Ecuadorean police showed journalists to demonstrate his guilt was nothing more than a pile of USB drives, hard drives, two-factor authentication keys, and technical manuals: all familiar property for anyone working in his field.

Ola is a free software developer, who worked to improve the security and privacy of the Internet for all its users. He has worked on several key open source projects, including JRuby, several Ruby libraries, as well as multiple implementations of the secure and open communication protocol OTR. Ola’s team at ThoughtWorks contributed to Certbot, the EFF-managed tool that has provided strong encryption for millions of websites around the world.

Like many people working on the many distributed projects defending the Internet, Ola has no need to work from a particular location. He traveled the world, but chose to settle in Ecuador because of his love of that country and of South America in general. At the time of his arrest, he was putting down roots in his new home, including co-founding Centro de Autonomia Digital, a non-profit devoted to creating user-friendly security tools, based out of Ecuador’s capital, Quito.

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Python Programming Leftovers

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Programming Leftovers

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  • Programming languages: Python developers now outnumber Java ones [Ed: Makes the typical grave error of using a Microsoft site as an indicator of programming and FOSS trends as if coders don't exist unless they give their code to Microsoft]

    Python's rise among developers around the world has been documented by several well-known programming-language indexes. But UK developer-focused analyst SlashData has now put a figure on the actual number of developers that use the language.

  • Removing Files from Git History

    Today I did run again into an old problem: You need to archive a lot small and large files inside a single Git repository and you have no support for Git LFS available. You did this several year and now you ended up in a state where cloning and working with the repository is unbearable slow.

    What now? Last time I did run into that, I archived the overfull repository to some “rest in peace” space and used git filter-branch to filter out no longer needed and too large objects from a repository copy that then will replace the old one for daily use.

    There are a lot of guides available how to use git filter-branch for that. All variants I ever used were complex to do and did take very long. Especially if you need several tries to get a sane set of stuff you want to remove to gain enough space savings.

  • An important message to people designing testing frameworks!

    Do not, I repeat, NOT make your test framework fail a test run if it writes any text to stderr! No matter how good of on idea you think it is, it's terrible.

    If you absolutely, positively have to do that, then print the reason for this failure in your output log. If you can't think of a proper warning message, feel free to copy paste this one...

  • Detecting malaria with deep learning

    There are several methods that can be used for malaria detection and diagnosis. The paper on which our project is based, "Pre-trained convolutional neural networks as feature extractors toward improved Malaria parasite detection in thin blood smear images," by Rajaraman, et al., introduces some of the methods, including polymerase chain reaction (PCR) and rapid diagnostic tests (RDT). These two tests are typically used where high-quality microscopy services are not readily available.

    The standard malaria diagnosis is typically based on a blood-smear workflow, according to Carlos Ariza's article "Malaria Hero: A web app for faster malaria diagnosis," which I learned about in Adrian Rosebrock's "Deep learning and medical image analysis with Keras." I appreciate the authors of these excellent resources for giving me more perspective on malaria prevalence, diagnosis, and treatment.

  • removing array duplicates

    I had an array with some duplicates. I wanted to remove them. I know how to do this, but I searched for solutions anyway to make sure I wasn’t missing some trick. The results were disappointing, very language specific, and rarely discussed run time. And if we’re working with an unsorted array, the provided answers are even worse. Just sort the array first. Well, duh; any problem with unsorted data can be transformed into a problem with sorted data by sorting first. That’s not very interesting, though, and maybe there’s a reason the data is unsorted. Here’s a few solutions I worked through, but no stunning algorithmic breakthroughs.

  • A Rule of Divisibility by 7

    A number m of the form 10x + y is divisible by 7 if and only if x − 2y is divisible by 7. In other words, subtract twice the last digit from the number formed by the remaining digits. Continue to do this until a number known to be divisible or not by 7 is obtained; you can stop when this number has at most 2 digits because you are supposed to know if a number of at most 2 digits is divisible by 7 or not.

    The original number is divisible by 7 if and only if the last number obtained using this procedure is divisible by 7.

  • Debugging Clang AST Matchers

    Last week I flew to Brussels for EuroLLVM followed by Bristol for ACCU.

    At both conferences I presented the work I’ve been doing to make it easier for regular C++ programmers to perform ‘mechanical’ bespoke refactoring using the clang ASTMatchers tooling. Each talk was prepared specifically for the particular audience at that conference, but both were very well received. The features I am working on require changes to the upstream Clang APIs in order to enable modern tooling, so I was traveling to EuroLLVM to try to build some buy-in and desire for those features.

    I previously delivered a talk on the same topic about AST Matchers at code::dive 2018. This week I presented updates to the tools and features that I have worked on during the 6 months since.

    One of the new features I presented is a method of debugging AST Matchers.

  • Introduction to the Python Calendar Module

    Python has an built-in module named Calendar that contains useful classes and functions to support a variety of calendar operations. By default, the Calendar module follows the Gregorian calendar, where Monday is the first day (0) of the week and Sunday is the last day of the week (6).

    In Python, datetime and time modules also provide low-level calendar-related functionalities. In addition to these modules, the Calendar module provides essential functions related to displaying and manipulating calendars.

    To print and manipulate calendars, the Calendar module has 3 important classes: Calendar, TextCalendar, and HTMLCalendar. In this article, we will see how these classes can help implement a variety of calendar related functions.

Programming: Stack Overflow Developer Survey Followup, Compilers, C and Python

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  • What is your biggest work environment distraction?

    The 2019 Stack Overflow Developer Survey results show that more than 40% of respondents say a distracting work environment is the biggest challenge to productivity. What distracts you most in your work environment?

  • More than coders

    Lately, the compiler team has been changing up the way that we work. Our goal is to make it easier for people to track what we are doing and – hopefully – get involved. This is an ongoing effort, but one thing that has become clear immediately is this: the compiler team needs more than coders.

    Traditionally, when we’ve thought about how to “get involved” in the compiler team, we’ve thought about it in terms of writing PRs. But more and more I’m thinking about all the other jobs that go into maintaining the compiler. “What kinds of jobs are these?”, you’re asking.

  • Python for NLP: Introduction to the TextBlob Library
  • Linux C Programming tutorial part 22 - Accessing command line arguments within C program

    In the previous tutorial, we discussed multiple concepts related to pointers in C programming language. One of the concepts we discussed was an array of pointers.

  • PyCharm: Webinar: “Effective Data Science with PyCharm” with Dan Tofan

    Data Science! A huge topic which has swept through all programming languages, especially Python. PyCharm has unique facilities aimed at data science professionals. But if you’re a data scientist, where to start on using PyCharm with it?

  • Linear Regression in Python

    We’re living in the era of large amounts of data, powerful computers, and artificial intelligence. This is just the beginning. Data science and machine learning are driving image recognition, autonomous vehicles development, decisions in the financial and energy sectors, advances in medicine, the rise of social networks, and more. Linear regression is an important part of this.

    Linear regression is one of the fundamental statistical and machine learning techniques. Whether you want to do statistics, machine learning, or scientific computing, there are good chances that you’ll need it. It’s advisable to learn it first and then proceed towards more complex methods.

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Python Programming Leftovers

GNU/Linux Leftovers

  • USB Support In Chrome OS 75 Will Make Linux Incredibly Versatile
    Chrome OS Linux instances are on the cusp of becoming immensely more useful and versatile based on a recent change spotted by Keith I Myers in the beta-specific Developer Channel following an update to version 75.0.3759.4. That's because while the update inevitably introduced some new bugs that will need to be squashed before a final release, it also included full support for USB devices on the Crostini side of the equation.
  • Old computer? Linux can give it a new lease on life
    The operating system is called Linux and was created in 1991 by Finnish student Linus Torvalds. He released Linux as open source which meant that any good programmer could tinker with it and improve upon the original. Today Linux is a popular free alternative for Windows and Mac computers and used by millions of people. The beauty is that Linux requires much less processing power and memory than Windows and is perfect for older computers.
  • At Least 27% Of Gentoo's Portage Can Be Easily LTO Optimized For Better Performance
    entooLTO is a configuration overlay for Gentoo's overlay to make it easy to enable Link Time Optimizations (LTO) and other compiler optimizations for enabling better performance out of the Gentoo packages. GentooLTO appears to be inspired in part by the likes of Clear Linux who employ LTO and other compiler optimization techniques like AutoFDO for yielding better performance than what is conventionally shipped by Linux distributions. The GentooLTO developers and users have wrapped up their survey looking at how practical this overlay configuration is on the massive Portage collection.  The initial GentooLTO survey has been going on since last October and they have collected data from more than 30 users. The survey found that of the Gentoo Portage 18,765 packages as of writing, at least 5,146 of them are working with the GentooLTO configuration.