Python Programming

• How to Filter Data in Django? – Linux Hint

  It is a very common requirement for the web application to display data on the web page based on the user’s interest. The searching feature of the application makes it more user-friendly. Django framework has a built-in filter() method to filter data from the database tables. A table can contain many records and sometimes determining some specific data are required based on the particular criteria. This task becomes easier by using the filter() method in different ways. How the data from a database table can be filtered using the filter method in four different ways will be discussed in this tutorial.

• How to Create Django Templates? – Linux Hint

  A template contains HTML data that is generated from a view and displayed in the browser. The static and dynamic HTML pages can be created using the template. Logic and design have been kept separately in the Django application. Python code can’t be used directly in the Django template because the browser can’t interpret the python code. The designer can design the HTML pages only with the necessary format or styling, and the coder adds the static or dynamic data into the template using Django Template Language (DTL). How the Django template can be created and how the DTL can be used to add static or dynamic content to the template have been shown in this tutorial.

• How to Create Django Form? – Linux Hint

  The use of the form is an essential part of any web application. The input from the website users can be taken using the form. It can contain different types of fields, such as text box, combo box, check box, radio button, etc. to take data from the users. Django framework contains a large number of libraries to help the web developer to design an HTML form for taking input from the user, process the input, and respond to the user’s input. How HTML form can be used to take data from the user, read the input values, and print the values in the browser using Django is shown in this tutorial.

• How to Get Started with Pandas in Python – a Beginner's Guide

  The Pandas package in Python gives you a bunch of cool functions and features that help you manipulate data more efficiently. It also lets you perform numerous data cleaning and data preprocessing steps with very little hassle. That's great isn't it? Here's a list of some of the most frequently used Pandas functions and tricks to help you enjoy your data science journey.

Ubuntu Leftovers

• How to Create an ISO from Current Installation in Ubuntu 20.04 – Linux Hint

  In Ubuntu, most programs and operating systems can be installed through the ISO file. The ISO file format is a live identical image of the specific operating environment that contains all required installation files. Another name used for ISO files is a disc image. So, an ISO file is a perfect duplicate of the content of an optical disc, such as DVD and CD images. An ISO file is a package that consists of installation directories in an ISO format. Users can create a backup of their current installation in an ISO file format. The ISO file can also be used as an external drive, or you can make a bootable USB. if you have an ISO file, then you can create the installation disc by burning the image to a CD or USB. This article shows you how to create an ISO file from a currently installed Ubuntu 20.04 system. You can create an ISO file from the current installation of Ubuntu 20.04 using any of the following methods.

• How to Install Security Updates in Ubuntu 20.04 – Linux Hint

  An essential part of using any operating system is to check for security updates from time to time. It can be difficult to keep track of security updates all the time. One of the easiest ways to keep your Ubuntu system secure is by upgrading your software packages. New versions add the latest features available, and system security is increased by updating programs frequently. This guide shows you how to install security updates in Ubuntu 20.04, which will be performed by upgrading security packages.

• How To Use the C Programming Language in Ubuntu 20.04 – Linux Hint

  C is an excellent procedural programming language for beginners who want to learn how to program. Many applications, including databases and operating systems, use this general-purpose programming language for development. The C language is popular among new learners because it is not only easy to use but also helps programmers to better understand the internal architecture of the computer. C is the first step into the programming world, and after learning the C programming language, it will not be as difficult to learn other programming languages. Moreover, the C language is portable, as programs written in this language can be transferred to various platforms without requiring any changes to the code. This article shows you how to use the C programming language in Ubuntu 20.04 (LTS) and 20.10.

• What is build-essential Ubuntu, how to install and use it? – Linux Hint

  The build-essentials packages are meta-packages that are necessary for compiling software. They include the GNU debugger, g++/GNU compiler collection, and some more tools and libraries that are required to compile a program. For example, if you need to work on a C/C++ compiler, you need to install essential meta-packages on your system before starting the C compiler installation. When installing the build-essential packages, some other packages such as G++, dpkg-dev, GCC and make, etc. also install on your system. Above, we have described what the build-essential packages are. In the rest of the article, we will explain how to install and use build-essentials on Ubuntu systems. All terminal commands we have executed on Ubuntu 20.04 system in this article. Let’s dive into the depths!

• Learning Dart & Flutter

  My employer, Canonical - recently announced we’re working with the Flutter developers to bring their platform to the Linux desktop. My interest was piqued. Personally I like the concept of writing applications which can run on many platforms. I sometimes dabble with game development engines like Construct3, GDevelop, Unity & Godot which all have multiple export options for different platforms. Having similarly powerful, cross-platform and open source tools for building mobile and desktop (non-game) applications is welcome in my book.

• The Fridge: Ubuntu Weekly Newsletter Issue 673

  Welcome to the Ubuntu Weekly Newsletter, Issue 673 for the week of February 28 – March 6, 2021. The full version of this issue is available here.

Best Hex Editors for Linux

This article will list useful hex editor applications available for Linux. Hex editors allow you to modify pre-compiled binary files whose source code is typically not available to change. They work by browsing binary data present in a file and then presenting the data in hexadecimal notation to users. Hex editors can also show partial or full ASCII data depending on the contents of the file. These hex editors allow you to change hexadecimal values, thereby allowing users to modify file behavior even if they don’t have access to source code. However, the data represented by a hex editor is not exactly human readable. Reading and interpreting hexadecimal values to infer program logic and behavior is not an easy task by any means and it takes considerable efforts to find values and make even the smallest of change. A hex editor is one of the first tools used while reverse engineering a file.