Assertions are a powerful tool in Python for debugging and error-checking. They allow you to test assumptions in your code and raise an error if the assumption is false. In this guide, you will learn how to use assertions effectively in Python. 1. Introduction to Assertions An assertion is a condition or expression that you […]
Author: anujsharma
What is “pass” in Python?
In Python, the pass statement is a placeholder that does nothing. It’s a no-op, and it’s often used when you need a statement for syntactic reasons but don’t want it to have any operational effect. For example, in situations where you’re working on an incomplete code block or function and want to fill it in […]
Guide to User-Defined Exceptions in Python
User-defined exceptions in Python allow you to create custom exception classes to handle specific error scenarios in your code. This guide will walk you through the process of creating and using user-defined exceptions in Python. 1. What Are User-Defined Exceptions? Python provides a wide range of built-in exceptions, but sometimes you may encounter situations where […]
Guide to the raise Keyword in Python with Examples
The raise keyword in Python is used to raise exceptions. You can use it to raise built-in exceptions or your own custom exceptions. In this guide, we will explore the raise keyword, its syntax, and provide examples to illustrate its use. 1. Introduction to the raise Keyword In Python, exceptions are used to handle errors […]
Using GitHub with Git: A Beginner’s Guide
GitHub is a web-based platform that helps you collaborate on software projects using Git, a version control system. This guide will walk you through the basics of using GitHub and common Git commands. Let’s get started: Step 1: Create a GitHub Account Step 2: Install Git Step 3: Configure Git Step 4: Create a New […]
Understanding User-Defined Functions (UDFs) in MySQL with Examples
User-Defined Functions (UDFs) in MySQL allow you to create custom functions that can be used within SQL queries. These functions can encapsulate complex logic and make your queries more modular and readable. This guide will help you understand UDFs in MySQL, including their syntax, creation, types, and examples. 1. What is a User-Defined Function (UDF)? […]
Understanding Stored Procedures in MySQL with Examples
Stored procedures are a powerful feature in MySQL that allows you to store SQL statements for later execution. They are often used to encapsulate business logic, improve code organization, and enhance security. This guide will help you understand stored procedures in MySQL, including their syntax, creation, execution, and examples. 1. What is a Stored Procedure? […]
Understanding Unions in MySQL with Examples
A UNION in MySQL is used to combine the result sets of two or more SELECT statements into a single result set. This can be useful when you need to retrieve data from multiple tables or apply different conditions to the same table and want to display the results as a single unified dataset. In […]
A Comprehensive Guide to Joining Tables in MySQL
In MySQL, joining tables is a fundamental concept used to retrieve data from multiple tables simultaneously. Joins are essential for combining related data and performing complex queries. This guide will explain the various types of joins in MySQL with examples to help you master the art of table joining. Prerequisites Before you begin, ensure you […]
Guide to Using ALTER, UPDATE, and DELETE Statements in MySQL
In MySQL, the ALTER, UPDATE, and DELETE statements are essential for modifying and managing the data in your database tables. This guide will provide you with an overview of these SQL statements, along with examples to demonstrate their usage. Prerequisites Before you start, make sure you have MySQL installed and have access to a MySQL […]