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Mastering Python 2E

You're reading from   Mastering Python 2E Write powerful and efficient code using the full range of Python's capabilities

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Product type Paperback
Published in May 2022
Last Updated in May 2022
Publisher Packt
ISBN-13 9781800207721
Length 710 pages
Edition 2nd Edition
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Author (1):
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Rick Hattem Rick Hattem
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Rick Hattem
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Table of Contents (21) Chapters Close

Preface 1. Getting Started – One Environment per Project FREE CHAPTER 2. Interactive Python Interpreters 3. Pythonic Syntax and Common Pitfalls 4. Pythonic Design Patterns 5. Functional Programming – Readability Versus Brevity 6. Decorators – Enabling Code Reuse by Decorating 7. Generators and Coroutines – Infinity, One Step at a Time 8. Metaclasses – Making Classes (Not Instances) Smarter 9. Documentation – How to Use Sphinx and reStructuredText 10. Testing and Logging – Preparing for Bugs 11. Debugging – Solving the Bugs 12. Performance – Tracking and Reducing Your Memory and CPU Usage 13. asyncio – Multithreading without Threads 14. Multiprocessing – When a Single CPU Core Is Not Enough 15. Scientific Python and Plotting 16. Artificial Intelligence 17. Extensions in C/C++, System Calls, and C/C++ Libraries 18. Packaging – Creating Your Own Libraries or Applications 19. Other Books You May Enjoy
20. Index

Exercises

Working with asyncio will require active thought throughout most of your development process. Besides asyncio.run() and similar methods, there is no way to run an async def from synchronous code. This means that every intermediate function between your main async def and the code that needs asyncio will have to be async as well.

You could make a synchronous function return a coroutine so one of the parent functions can run it within an event loop. But that usually results in a very confusing execution order of the code, so I would not recommend going down that route.

In short, this means that any asyncio project you try with the asyncio debug setting enabled is good practice. We can create a few challenges, however:

  • Try to create a asyncio base class that automatically registers all instances for easy closing/destructuring when you are done
  • Create an asyncio wrapper class for a synchronous process such as file or network operations using executors...
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