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Python Network Programming

You're reading from   Python Network Programming Conquer all your networking challenges with the powerful Python language

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Product type Course
Published in Jan 2019
Publisher Packt
ISBN-13 9781788835466
Length 776 pages
Edition 1st Edition
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Concepts
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Authors (4):
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Dr. M. O. Faruque Sarker Dr. M. O. Faruque Sarker
Author Profile Icon Dr. M. O. Faruque Sarker
Dr. M. O. Faruque Sarker
Eric Chou Eric Chou
Author Profile Icon Eric Chou
Eric Chou
Abhishek Ratan Abhishek Ratan
Author Profile Icon Abhishek Ratan
Abhishek Ratan
Pradeeban Kathiravelu Pradeeban Kathiravelu
Author Profile Icon Pradeeban Kathiravelu
Pradeeban Kathiravelu
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Table of Contents (30) Chapters Close

Title Page
Copyright
About Packt
Contributors
Preface
1. Fundamental Concepts FREE CHAPTER 2. Python for Network Engineers 3. Continuous Integration for Network Engineers 4. SDN Concepts in Network Automation 5. Low-Level Network Device Interactions 6. APIs and Intent-Driven Networking 7. The Python Automation Framework – Ansible Basics 8. The Python Automation Framework – Beyond Basics 9. AWS Cloud Networking 10. Working with Git 11. Sockets, IPv4, and Simple Client/Server Programming 12. Multiplexing Socket I/O for Better Performance 13. IPv6, Unix Domain Sockets, and Network Interfaces 14. Programming with HTTP for the Internet 15. Email Protocols, FTP, and CGI Programming 16. Programming Across Machine Boundaries 17. Working with Web Services – SOAP, and REST 18. Network Monitoring and Security 19. Network Modeling 20. Authentication, Authorization, and Accounting (AAA) 21. Open and Proprietary Networking Solutions 22. NFV and Orchestration – A Larger Ecosystem 23. Programming the Internet 1. Other Books You May Enjoy Index

Writing a chat server using select.select


Launching a separate thread or process per client may not be viable in any larger network server application where several hundred or thousand clients are concurrently connected to the server. Due to the limited available memory and host CPU power, we need a better technique to deal with a large number of clients. Fortunately, Python provides the select module to overcome this problem.

How to do it...

We need to write an efficient chat server that can handle several hundred or a large number of client connections. We will use the select() method from the select module that will enable our chat server and client to do any task without blocking a send or receive a call all the time.

Let us design this recipe such that a single script can launch both client and server with an additional --name argument. Only if --name=server is passed from the command line, the script will launch the chat server. Any other value passed to the --name argument, for example...

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