Python Descriptors:Understanding and Using the Descriptor Protocol
Edition 版次：2nd ed.
Release Finelybook 出版日期：2018-10-09
pages 页数：97 pages
Create descriptors and see ideas and examples of how to use descriptors effectively. In this short book,you’ll explore descriptors in general,with a deep explanation of what descriptors are,how they work,and how they’re used. Once you understand the simplicity of the descriptor protocol,the author delves into using and creating descriptors in practice,with plenty of tips,patterns,and real-world guidance. Because descriptors are inherently flexible,you’ll work with multiple examples illustrating how to best take advantage of them.
This second edition includes additions throughout,including new material covering the set_name_() descriptors,new and improved flowcharts to explain the inner workings of descriptors,and a completely new chapter to address instance-level attributes,the easiest way to create descriptors correctly the first time.
Although brief,Python Descriptors is a comprehensive guide to creating Python descriptors,including a pip install-able library called descriptor_tools,which was written alongside this book and is an open source library on GitHub. After reading this book,you will have a solid understanding of how descriptors work and the techniques to avoid the big gotchas associated with working with them.
What You Will Learn
Discover descriptor protocols
Master attribute access and how it applies to descriptors
Build your own descriptors
Use descriptors to store attributes
Create read-only descriptors
Explore the descriptor classes
Apply the other uses of descriptors
Who This Book Is For
Experienced Python coders,programmers,and developers.
Cover Part l. About Descriptors
1. What ls a Descriptor?
2. The Descriptor Protocol
3. What Are Descriptors Good For?
4. Descriptors in the Standard Library
5. Attribute Access and Descriptors Partl. Making Descriptors
6. Which Methods Are Needed?
7. Storing the Attributes
8. Read-Only Descriptors
10. Descriptors Are Classes Too
11. Reusing the Wheel
12. Instance-Level Descriptors
13. Other Uses of Descriptors In the World