The Third Edition of Python Programming using Problem-solving Approach is designed to serve as a comprehensive textbook for undergraduate and postgraduate students of computer science, information technology, and other programming streams. It is also an invaluable resource for professionals who wish to learn data structures and algorithms to enhance their skills and stay competitive in the ever-evolving tech industry. This book aims to introduce readers to the fundamentals of Python programming while emphasizing the importance of problem-solving skills. By presenting real-world examples and practical exercises, the book seeks to equip readers with the knowledge and confidence to tackle complex programming challenges. The book provides a thorough introduction to Python programming, starting with the basics and gradually progressing to more advanced topics. Each chapter is structured to build on the previous one, ensuring a smooth learning curve for readers. The problem-solving approach adopted in this book encourages readers to think critically and develop efficient solutions to programming challenges.