Author: Rahul

Creating directories in Python is a frequent operation, especially when managing files, logs, or organizing project structures. The `os` module in the Python Standard Library provides a method called `mkdir()` to create directories. Additionally, the `pathlib` module introduced in Python 3.4 also offers a more object-oriented way to handle filesystem paths and operations. This article will dive into different methods to create directories in Python. 1. Using the os module The `os` module is a built-in Python module that provides a way of interacting with the operating system. Example: import os # Create a directory named ‘example_dir’ os.mkdir(‘example_dir’) If the…

Python has been a preferred language for web development for many years, thanks to frameworks such as Django and Flask that have made web application development easier and more efficient. However, in recent years, there’s been an increasing demand for asynchronous web frameworks that can handle a large number of simultaneous connections, as is common with modern web apps. Enter FastAPI: a modern, asynchronous web framework that’s built on top of Starlette for web routing and Pydantic for data serialization/deserialization. FastAPI is designed to create RESTful APIs quickly and efficiently. It offers automatic interactive API documentation, type checking, and asynchronous…

ASCII, which stands for the American Standard Code for Information Interchange, is a character encoding standard that represents each character as a number between 0 and 127. Each number corresponds to a unique character. For instance, the ASCII value of the character ‘A’ is 65, and that of ‘a’ is 97. In Python, finding the ASCII value of a character is a straightforward task, thanks to the built-in function ord(). This article explores how to retrieve the ASCII value of a character using this function. The ord() function Python’s built-in ord() function returns an integer representing the Unicode code point…

Python, known for its versatility and ease of use, offers built-in modules that make file operations, including copying, seamless. Not only does this save developers from the nuances of platform-specific file handling, but it also offers the richness of Python’s error-handling, ensuring robust operations. In this article, we will delve into creating a Python program to copy a file. Copying files is a fundamental task in data management and can be easily accomplished using Python’s standard library. Using the shutil Module: The shutil (shell utilities) module in Python provides a high-level file operations interface, and the copy() function is the…

Linux, like other operating systems, uses caching to optimize system performance. Over time, these caches can accumulate, and although Linux is adept at managing memory, there are situations where manual clearance might be beneficial, such as for system diagnostics, application performance tests, or other specific operations. In this article, we’ll delve into how to clear different types of cache in Linux: memory, swap, and buffer. Part 1: Quick Instructions Clear PageCache, dentries, and inodes: sync && echo 3 > /proc/sys/vm/drop_caches Clear Swap space: swapoff -a && swapon -a Part 2: Detailed Instructions PageCache optimizes file I/O by keeping frequently accessed…

Java, one of the most popular and widely-used programming languages, provides several mechanisms for initializing and working with variables. One of the interesting features of the Java programming language is the ability to create and use static fields. Static fields belong to the class itself, rather than to any specific instance of the class. This means that they’re shared across all instances of the class. Initialization of these fields is crucial, as it determines the default state of the class. In this article, we will explore different methods for initializing static fields in Java: during declaration, using a static initialization…

Memcached is a high-performance distributed memory cache service that is primarily used to speed up sites that make heavy use of databases. It does so by caching data and objects in RAM, which reduces the need to access the database on subsequent requests. This article will guide you through the process of setting up a Memcache server on Ubuntu 22.04. 1. Update System Packages It’s always recommended to update the system packages before you install any new service: sudo apt update && sudo apt upgrade -y 2. Install Memcached The Memcache service packages are available under default system repositories. You…

Java, a versatile object-oriented programming language, offers multiple mechanisms to initialize static members, one of which is the “Static Initialization Block.” This article delves into what this block is, how to use it, and the advantages associated with its use. Introduction In Java, fields (variables) and methods can either be instance-based or static. While instance variables have a new copy for every object of the class, static variables have only one copy which is shared among all instances of the class. The initialization of these static members is unique. Before we explore the Static Initialization Block, it’s crucial to understand…

If you are facing issue ERROR 1130 (HY000): Host ‘hostname’ is not allowed to connect to this MySQL server with your MySQL server. This is a standard security feature of MySQL to prevent unauthorized access. Essentially, the server hasn’t been configured to accept connections from the host and only allow to localhost or specific hosts only. This article will help you to understand a common causes of this error and provides a step-by-step approach to resolve it. Common Causes: Connection Restrictions: MySQL is configured by default to only allow connections from the localhost (127.0.0.1). User Privileges: A user might not…

The `/etc/passwd` file is one of the fundamental components of Linux and Unix-based systems. It contains information about user accounts on the system, serving as a central repository for user-related details. In this article, we will explore the structure, content, and importance of the /etc/passwd file in Linux. 1. Structure of /etc/passwd Each line in the /etc/passwd file represents a user account and contains seven fields separated by colons (:). The general format is: username:password:UID:GID:GECOS:home_directory:shell Let’s break down these fields: username: This is the login name of the user. It’s what one would use to log into the system. password:…