https://blog.virtualzero.tech The latest from the VirtualZero Blog © VirtualZero 2020, all rights reserved en Wed, 11 March 2020 17:03:32 -0000 Sun, 12 Apr 2020 19:16:27 +0000 VirtualZero Blog Static Site Generator - blog.virtualzero.tech https://cdn.virtualzero.tech/branding/rss/rss_icon/optimized/virtualzero-rss-icon-purple-28x28-optimized.png Tech tutorials, blogs, and more by VirtualZero. https://blog.virtualzero.tech https://blog.virtualzero.tech/entries/python/script/how-to-sort-a-list-of-objects-by-an-object-attribute-in-python https://blog.virtualzero.tech/entries/python/script/how-to-sort-a-list-of-objects-by-an-object-attribute-in-python Sun, 12 Apr 2020 19:16:27 +0000 In some cases it is useful to sort a list of objects alphabetically or by an attribute like an ID number. The Python operator module allows us to easily achieve this. Python Script how to sort list of objects by attribute python, sort list by object property python Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/python/script/how-to-use-the-argparse-module-in-python https://blog.virtualzero.tech/entries/python/script/how-to-use-the-argparse-module-in-python Sun, 12 Apr 2020 16:06:26 +0000 The argparse module for Python enables a CLI program to accept command line arguments when executing a program. Argparse provides support for both positional and optional arguments while supplying enough configuration options to make scripting with argparse a breeze. Python Script how to argparse python, argparse example python, command line arguments python Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/javascript/inheritance/how-to-use-class-inheritance-in-javascript https://blog.virtualzero.tech/entries/javascript/inheritance/how-to-use-class-inheritance-in-javascript Tue, 07 Apr 2020 21:25:31 +0000 Class inheritance allows a child class to extend a parent class. Class inheritance promotes reusability by allowing the developer to write less code. This tutorial will demonstrate how to use class inheritance in vanilla JavaScript. JavaScript Inheritance how to class inheritance javascript, javascript class inheritance, class extends javascript, what is extends javascript Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/python/class/how-to-use-class-methods-in-python https://blog.virtualzero.tech/entries/python/class/how-to-use-class-methods-in-python Mon, 06 Apr 2020 22:24:49 +0000 Python’s class methods provide a way to create alternate constructors for a given class. This is especially useful if the data used to instantiate the class objects comes from varying source formats like typical keyboard input, JSON, and CSV. Python Class how to class method python, how to @classmethod python, what is python class method Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/aws/s3/how-to-check-if-an-object-exists-in-aws-s3-using-python-and-boto3 https://blog.virtualzero.tech/entries/aws/s3/how-to-check-if-an-object-exists-in-aws-s3-using-python-and-boto3 Sun, 05 Apr 2020 18:03:30 +0000 It is often necessary to programmatically check if an object exists before performing an action such as deleting the object, updating, the object, or invalidating an AWS CloudFront object. This tutorial will demonstrate how to check if an object exists in an S3 bucket using Python and Boto3. AWS S3 check if object exists python boto3, s3 object exists, how to check if object exists boto3, head s3 object boto3 Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/python/inheritance/how-to-use-class-inheritance-in-python https://blog.virtualzero.tech/entries/python/inheritance/how-to-use-class-inheritance-in-python Sat, 04 Apr 2020 00:27:38 +0000 Class inheritance is an important concept in Python and OOP languages in general. Inheritance’s main benefit is reusability, allowing the properties and methods of the parent class to be used by the child class. Python Inheritance how to class inheritance python, python class inheritance example, class inheritance how to python Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/javascript/window/how-to-open-a-link-in-a-new-tab-with-javascript https://blog.virtualzero.tech/entries/javascript/window/how-to-open-a-link-in-a-new-tab-with-javascript Tue, 24 Mar 2020 20:31:02 +0000 Opening a link in a new tab with JavaScript is as simple as it is with the HTML <a> tag’s target attribute. In fact, it even uses "_blank" as the target for the new tab just like the HTML <a> tag. JavaScript Window new tab javascipt, open link new tab javascript, javascript open in new tab Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/javascript/function/how-to-write-a-self-executing-javascript-function https://blog.virtualzero.tech/entries/javascript/function/how-to-write-a-self-executing-javascript-function Mon, 23 Mar 2020 22:30:28 +0000 It is sometimes necessary to write self-executing (or self-invoking) anonymous functions in JavaScript. Variables within these special functions are limited to the code within the function only. This allows functions to be written with variable names that are used in other code blocks without effecting them. JavaScript Functions how to self executing javascript, javascript self executing function, how to self invoking javascript Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/python/xml/how-to-encode-strings-for-xml-with-python https://blog.virtualzero.tech/entries/python/xml/how-to-encode-strings-for-xml-with-python Sun, 22 Mar 2020 00:49:31 +0000 Stings within XML tags need to be properly formatted. Without proper formatting, a XML Parsing Error is likely to occur. This tutorial demonstrates how to encode strings properly for XML using Python. Python XML xml parsing error, xml parsing error python, format xml python, xml format python, xml format string python, escape xml string python Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/aws/cloudfront/how-to-invalidate-aws-cloudfront-objects-with-python-and-boto3 https://blog.virtualzero.tech/entries/aws/cloudfront/how-to-invalidate-aws-cloudfront-objects-with-python-and-boto3 Sun, 15 Mar 2020 00:34:21 +0000 This tutorial demonstrates how to invalidate AWS CloudFront objects by paths using Python and Boto3. AWS CloudFront invalidate cloudfront boto3, create invalidation boto3, how to create_validation boto3 Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/linux/nano/how-to-open-crontab-with-nano https://blog.virtualzero.tech/entries/linux/nano/how-to-open-crontab-with-nano Fri, 13 Mar 2020 22:25:19 +0000 Nano is an extremely user-friendly text editor for Linux. Learn how to use nano to edit crontab files. Linux Nano crontab nano, open crontab with nano, how to crontab nano, how to open crontab with nano Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/python/script/how-to-delete-files-older-than-x-days-in-python https://blog.virtualzero.tech/entries/python/script/how-to-delete-files-older-than-x-days-in-python Thu, 12 Mar 2020 23:19:37 +0000 In this tutorial, we will create a Python script that will delete all files in a directory that are older than x number of days. Python Script python delete files older than x days, delete old files python, remove all files older than x days python Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/kde/plasma/how-to-configure-the-screen-locking-shortcut-in-kde https://blog.virtualzero.tech/entries/kde/plasma/how-to-configure-the-screen-locking-shortcut-in-kde Thu, 12 Mar 2020 21:32:06 +0000 This tutorial demonstrates how to configure the screen locking shortcut in KDE Plasma. KDE Plasma screen locking shortcut kde, kde configure screen lock shortcut, screen locking hotkey kde Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/linux/bash/how-to-check-the-exit-status-of-a-command-in-a-bash-script https://blog.virtualzero.tech/entries/linux/bash/how-to-check-the-exit-status-of-a-command-in-a-bash-script Wed, 11 Mar 2020 22:56:15 +0000 This tutorial demonstrates how to check the exit status of a Bash command in a script. Linux Bash check bash command exit status, bash exit status check, exit status check bash, exit status Birtchum Thompson VirtualZero https://blog.virtualzero.tech/entries/ubuntu/ufw/how-to-allow-smb-in-ufw-on-ubuntu https://blog.virtualzero.tech/entries/ubuntu/ufw/how-to-allow-smb-in-ufw-on-ubuntu Wed, 11 Mar 2020 21:47:34 +0000 This tutorial demonstrates the process of allowing SMB (Samba) traffic in UFW on Ubuntu and Debian operating systems. Ubuntu UFW allow smb traffic in ufw, smb and ufw, ubuntu allow smb ufw, ufw, smb, samba, debian Birtchum Thompson VirtualZero