Book Image

Learning Python Application Development

By : Ninad Sathaye
Book Image

Learning Python Application Development

By: Ninad Sathaye

Overview of this book

Python is one of the most widely used dynamic programming languages, supported by a rich set of libraries and frameworks that enable rapid development. But fast paced development often comes with its own baggage that could bring down the quality, performance, and extensibility of an application. This book will show you ways to handle such problems and write better Python applications. From the basics of simple command-line applications, develop your skills all the way to designing efficient and advanced Python apps. Guided by a light-hearted fantasy learning theme, overcome the real-world problems of complex Python development with practical solutions. Beginning with a focus on robustness, packaging, and releasing application code, you’ll move on to focus on improving application lifetime by making code extensible, reusable, and readable. Get to grips with Python refactoring, design patterns and best practices. Techniques to identify the bottlenecks and improve performance are covered in a series of chapters devoted to performance, before closing with a look at developing Python GUIs.
Table of Contents (18 chapters)
Learning Python Application Development
Credits
Disclaimers
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Chapter 2. Dealing with Exceptions

In the previous chapter, we started with a simple command-line script and gradually transformed it into an object-oriented code. Several new features were added in the process. So far, we have paid little attention to the application quality. We neglected to look for any obvious errors encountered during the program execution. Such errors detected during the application runtime are referred to as exceptions. In this chapter, you will learn techniques to make the application more robust by handling exceptions.

Specifically, we will cover the following topics:

  • What are the exceptions in Python?

  • Controlling the program flow with the try…except clause

  • Dealing with common problems by handling exceptions

  • Creating and using custom exception classes

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