Book Image

Modern Python Cookbook

Book Image

Modern Python Cookbook

Overview of this book

Python is the preferred choice of developers, engineers, data scientists, and hobbyists everywhere. It is a great scripting language that can power your applications and provide great speed, safety, and scalability. By exposing Python as a series of simple recipes, you can gain insight into specific language features in a particular context. Having a tangible context helps make the language or standard library feature easier to understand. This book comes with over 100 recipes on the latest version of Python. The recipes will benefit everyone ranging from beginner to an expert. The book is broken down into 13 chapters that build from simple language concepts to more complex applications of the language. The recipes will touch upon all the necessary Python concepts related to data structures, OOP, functional programming, as well as statistical programming. You will get acquainted with the nuances of Python syntax and how to effectively use the advantages that it offers. You will end the book equipped with the knowledge of testing, web services, and configuration and application integration tips and tricks. The recipes take a problem-solution approach to resolve issues commonly faced by Python programmers across the globe. You will be armed with the knowledge of creating applications with flexible logging, powerful configuration, and command-line options, automated unit tests, and good documentation.
Table of Contents (18 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Avoiding a potential problem with an except: clause


There are some common mistakes in exception handling. These can cause programs to become unresponsive.

One of the mistakes we can make is to use the except: clause. There are a few other mistakes which we can make if we're not cautious about the exceptions we try to handle.

This recipe will show some common exception handling errors that we can avoid.

Getting ready

In the Avoiding a potential problem with an except: clause recipe we looked at some considerations when designing exception handling. In that recipe, we discouraged the use of BaseException because we can interfere with stopping a misbehaving Python program.

We'll extend the idea of what not to do in this recipe.

How to do it...

Use except Exception: as the most general kind of exception managing.

Handling too many exceptions can interfere with our ability to stop a misbehaving Python program. When we hit Ctrl + C, or send a SIGINT signal via kill -2, we generally want the program to...