Author: anujsharma

Why You Need Custom Exception Classes

Custom exception classes are an essential part of robust and maintainable software development. Here are several key reasons why you might need to define your own exception classes in Python: 1. Clarity and Specificity Custom exceptions can make your code more readable and easier to understand. By defining exceptions that are specific to your application, […]

User-Defined Exceptions in Python

Introduction In Python, exceptions are events that disrupt the normal flow of a program. When such an event occurs, the program crashes unless the exception is handled. Python has many built-in exceptions, such as ValueError, TypeError, and IndexError. However, there are situations where these built-in exceptions may not adequately represent the specific error conditions of […]

Understanding Python Decorators

Python decorators are a powerful tool that allows you to modify the behavior of a function or class method. Here’s a step-by-step guide to understanding them with examples. Step 1: Understand Functions as First-Class Objects In Python, functions are first-class objects, meaning they can be passed around and used as arguments, just like any other […]

Index in MySQL

Introduction to Indexes Indexes in MySQL are used to speed up the retrieval of rows by using a pointer. They are essential for enhancing the performance of database queries. Types of Indexes Creating an Index To create an index, use the CREATE INDEX statement. Syntax Example Consider a table students: To create an index on […]

Introduction to JSON

What is JSON? JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language but is language-independent, meaning it can be used with many programming languages. Why Use JSON? […]

Essential pip Commands for Python Package Management

Below is a list of commonly used pip commands for managing Python packages. pip is the package installer for Python, allowing you to install, update, and manage Python packages from the Python Package Index (PyPI) and other package indexes. Basic pip Commands Install a specific version of a package: Managing Requirements Using Different Python Versions […]

Comprehensive Guide to Common Git Commands for GitHub Workflow

Here is a list of more common Git commands used for various operations in a GitHub workflow, along with brief descriptions to help you understand their usage: Basic Local Repository Operations Branch Management Working with Remotes Inspection and Comparison Stash Merging and Rebasing Tagging Advanced Inspection These commands form the foundation of interacting with Git […]

Understanding the Difference Between Git and GitHub: Tools and Platforms for Collaborative Development

The difference between Git and GitHub is a common question as both are closely related but serve different functions within the domain of software development and version control: Git GitHub Key Differences In summary, Git and GitHub complement each other; Git provides the version control functionality locally on your machine, and GitHub offers a place […]