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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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Toc

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

Creating a basic log

There are three steps to producing a log. The two necessary steps are the following:

  1. Get a logging.Logger instance with the logging.getLogger() function; for example, logger=logging.getLogger("demo").
  2. Create messages with that Logger. There are a number of methods, with names such as warn(), info(), debug(), error(), and fatal(), that create messages with different levels of importance. For example, logger.info("hello world").

These two steps are not sufficient to give us any output, however. There's a third, optional step that we take when we want to see logged messages. The reason for having a third step is because seeing a log isn't always required. Consider a debugging log that is generally left silent. The optional step is to configure the logging module's handlers, filters, and formatters. We can use the logging.basicConfig...

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