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Mastering Object-Oriented Python

You're reading from   Mastering Object-Oriented Python Build powerful applications with reusable code using OOP design patterns and Python 3.7

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Product type Paperback
Published in Jun 2019
Publisher Packt
ISBN-13 9781789531367
Length 770 pages
Edition 2nd Edition
Languages
Tools
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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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Table of Contents (25) Chapters Close

Preface
Who this book is for
What this book covers
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1. Preliminaries, Tools, and Techniques FREE CHAPTER 2. The __init__() Method 3. Integrating Seamlessly - Basic Special Methods 4. Attribute Access, Properties, and Descriptors 5. The ABCs of Consistent Design 6. Using Callables and Contexts 7. Creating Containers and Collections 8. Creating Numbers 9. Decorators and Mixins - Cross-Cutting Aspects 10. Serializing and Saving - JSON, YAML, Pickle, CSV, and XML 11. Storing and Retrieving Objects via Shelve 12. Storing and Retrieving Objects via SQLite 13. Transmitting and Sharing Objects 14. Configuration Files and Persistence 15. Design Principles and Patterns 16. The Logging and Warning Modules 17. Designing for Testability 18. Coping with the Command Line 19. Module and Package Design 20. Quality and Documentation

Configuration Gotcha

The basicConfig() method of logging is careful about preserving any loggers created before the configuration is made. The logging.config.dictConfig() method, however, has the default behavior of disabling any loggers created prior to configuration.

When assembling a large and complex application, we may have module-level loggers that are created during the import process. The modules imported by the main script could potentially create loggers before logging.config is created. Also, any global objects or class definitions might have loggers created prior to the configuration.

We often have to add a line such as this to our configuration file:

disable_existing_loggers: False 

This will ensure that all the loggers created prior to the configuration will still propagate to the root logger created by the configuration.

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