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Modern Python Cookbook

You're reading from   Modern Python Cookbook 130+ updated recipes for modern Python 3.12 with new techniques and tools

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Product type Paperback
Published in Jul 2024
Publisher Packt
ISBN-13 9781835466384
Length 818 pages
Edition 3rd Edition
Languages
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Author (1):
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Steven F. Lott Steven F. Lott
Author Profile Icon Steven F. Lott
Steven F. Lott
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Toc

Table of Contents (20) Chapters Close

Preface 1. Chapter 1 Numbers, Strings, and Tuples FREE CHAPTER 2. Chapter 2 Statements and Syntax 3. Chapter 3 Function Definitions 4. Chapter 4 Built-In Data Structures Part 1: Lists and Sets 5. Chapter 5 Built-In Data Structures Part 2: Dictionaries 6. Chapter 6 User Inputs and Outputs 7. Chapter 7 Basics of Classes and Objects 8. Chapter 8 More Advanced Class Design 9. Chapter 9 Functional Programming Features 10. Chapter 10 Working with Type Matching and Annotations 11. Chapter 11 Input/Output, Physical Format, and Logical Layout 12. Chapter 12 Graphics and Visualization with Jupyter Lab 13. Chapter 13 Application Integration: Configuration 14. Chapter 14 Application Integration: Combination 15. Chapter 15 Testing 16. Chapter 16 Dependencies and Virtual Environments 17. Chapter 17 Documentation and Style 18. Other Books You May Enjoy
19. Index

2.9 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 exception class 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.

2.9.1 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 exception classes can interfere with stopping a misbehaving Python program. We’ll extend the idea of what not to do in this recipe.

2.9.2 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...

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