5.1 Introduction
In this chapter, students will learn the essential techniques of code testing and debugging to ensure their programs function correctly. They will understand the importance of testing for creating reliable applications and explore common types of programming errors and bugs. The chapter covers unit testing using Python's unittest and pytest modules, guiding students on how to write and execute test cases. Students will also be introduced to the process of debugging, including setting breakpoints, using watch expressions, and performing step-by-step debugging. Furthermore, the chapter explains exception handling and how to manage multiple exception types effectively. Finally, students will explore profiling and optimization techniques to measure performance and identify potential bottlenecks in their code.