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Python for Network Engineers

As we are now familiar with how to write a program using the concepts used in programming languages, as well as best practices, now let's dig deep into writing an actual Python program or script. Keeping the primary focus on how to write a program in Python, we will also see how to write the same program in PowerShell, since there might be times where we would need to use PowerShell to achieve the results that we are looking for. We will cover various aspects of creating a program with some explanations of each of the statements and provide some tips and tricks to get through those tricky situations.

In this chapter, we will cover the following topics:

Python interpreter and data types
Writing Python scripts using conditional loops
Functions
Installing new modules/libraries
Passing arguments from command line for scripts
Using Netmiko to interact...

Key benefits

•Get started with network automation (and different automation tasks) with relevant use cases

•Apply software design principles such as Continuous Integration and DevOps to your network toolkit

•Guides you through some best practices in automation

Description

Network automation is the use of IT controls to supervise and carry out every-day network management functions. It plays a key role in network virtualization technologies and network functions. The book starts by providing an introduction to network automation, SDN, and its applications, which include integrating DevOps tools to automate the network efficiently. It then guides you through different network automation tasks and covers various data digging and reporting methodologies such as IPv6 migration, DC relocations, and interface parsing, all the while retaining security and improving data center robustness. The book then moves on to the use of Python and the management of SSH keys for machine-to-machine (M2M) communication, all followed by practical use cases. The book also covers the importance of Ansible for network automation including best practices in automation, ways to test automated networks using different tools, and other important techniques. By the end of the book, you will be well acquainted with the various aspects of network automation.

What you will learn

•Get the detailed analysis of Network automation

•Trigger automations through available data factors

•Improve data center robustness and security through specific access and data digging

•Get an Access to APIs from Excel for dynamic reporting

•Set up a communication with SSH-based devices using netmiko

•Make full use of practical use cases and best practices to get accustomed with the various aspects of network automation

What do you get with Print?

Instant access to your digital eBook copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Download this book in EPUB and PDF formats

Access this title in our online reader with advanced features

DRM FREE - Read whenever, wherever and however you want

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JP Jan 25, 2020

Automation with python is great

Amazon Verified review

David Jan 10, 2018

First, I'll note, I purchased the book directly from the publisher in eBook format for a significant discount. I'm not sure why it cost so much more on Amazon.I'm giving it five stars because it is exactly what the title suggests it is: examples of "Practical Network Automation." The book is full of straightforward coding examples using modern Python libraries/modules and the Ansible automation framework (from a network automation perspective). For anyone who has a very rudimentary understanding of Python coding (or coding, in general), you shouldn't feel lost while reading this book. It also walks through the code, piece-by-piece, explaining the logic, which will be very helpful to anyone who has not done much coding, other than a few scripts here and there (like myself). Generally speaking, the book feels like a quick, but still practical, introduction to automation possibilities; this book is *not* the be-all and end-all for learning network automation.That said, I will call out some issues some people may take with the book. As stated above, this book is *not* the be-all and end-all for learning network automation. For me, I was looking for a book with a more granular showing of practical network automation examples. We operate a network with 10s to 100s of routers, switches, firewalls, etc. and I was looking for a book that would present the inherent problems that come with management of networks of such scale, and then show me "the light." Instead, I felt this merely scratched the surface of what can be accomplished. The book felt too broad, and therefore too unspecific for it to be superbly useful in "practice." It gave me some additional ideas for improvement, and added guidance, but not a full answer.In short, this book will be well received by those in the networking industry who have little-to-no experience or understanding of automation. And for those people, I would highly recommend it. But for others, like myself, who have already spent countless hours poking and prodding with the various automation software available, I suspect they will still feel as though they haven't been given the full answer as to how they can harness the automation revolution (if you will) to limit their repetitious work, implement standards-based configurations, and manage their networks from a single point of control.

ajay Nov 24, 2017

Nice book to understand logic to implement automation in networking space.

Yuck The Fankees Feb 09, 2019

I really enjoyed this book, I found the code examples and use cases to be very helpful.

Avantika Srivastava Nov 24, 2017

Great book! Unlike most geek books, this book speaks with you! The author has taken into consideration how one learns and has adopted the most effective approach to help you understand and learn easily and quickly!Concepts are explained very well, and it provides examples that will help you grasp the subject thoroughly. If you are looking for a book that helps you learn easily but doesn't compromise on the learning quality, then this is the right book for you.

Operators	Meaning
`==`	If both values are equal
`!=`	If both values are NOT equal
`>`	If the left value is greater than the right value
`<`	If the left value is smaller than the right value
`>=`	If the left value is greater than or equal to the right value
`<=`	If the left value is lesser than or equal to the right value
`in`	If the left value is part of the right value

Operators	Meaning
`==`	If both values are equal
`!=`	If both values are NOT equal
`>`	If the left value is greater than the right value
`<`	If the left value is smaller than the right value
`>=`	If the left value is greater than or equal to the right value
`<=`	If the left value is lesser than or equal to the right value
`in`	If the left value is part of the right value

Practical Network Automation: Leverage the power of Python and Ansible to optimize your network

What do you get with Print?

Practical Network Automation

Python for Network Engineers

Python interpreter and data types

Conditions and loops

Writing Python scripts

Functions

Python modules and packages

Python interpreter and data types

Conditions and loops

Writing Python scripts

Functions

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