Book Image

Modern Python Cookbook - Second Edition

By : Steven F. Lott
Book Image

Modern Python Cookbook - Second Edition

By: Steven F. Lott

Overview of this book

Python is the preferred choice of developers, engineers, data scientists, and hobbyists everywhere. It is a great language that can power your applications and provide great speed, safety, and scalability. It can be used for simple scripting or sophisticated web applications. By exposing Python as a series of simple recipes, this book gives you insight into specific language features in a particular context. Having a tangible context helps make the language or a given standard library feature easier to understand. This book comes with 133 recipes on the latest version of Python 3.8. The recipes will benefit everyone, from beginners just starting out with Python to experts. You'll not only learn Python programming concepts but also how to build complex applications. The recipes will touch upon all necessary Python concepts related to data structures, object oriented programming, functional programming, and statistical programming. You will get acquainted with the nuances of Python syntax and how to effectively take advantage of it. By the end of this Python book, you will be equipped with knowledge of testing, web services, configuration, and application integration tips and tricks. You will be armed with the knowledge of how to create applications with flexible logging, powerful configuration, command-line options, automated unit tests, and good documentation.
Table of Contents (18 chapters)
16
Other Books You May Enjoy
17
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 with no named exceptions to match. There are a few other mistakes that 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

When code can raise a variety of exceptions, it's sometimes tempting to try and match as many as possible. Matching too many exceptions 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...

We need to avoid using the bare except: clause. Instead, use except Exception: to match the most general kind of exception that an application can reasonably handle.

Handling too many exceptions can interfere with our ability to stop...