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Practical Network Automation

You're reading from   Practical Network Automation Leverage the power of Python and Ansible to optimize your network

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Product type Paperback
Published in Nov 2017
Publisher Packt
ISBN-13 9781788299466
Length 266 pages
Edition 1st Edition
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Author (1):
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Abhishek Ratan Abhishek Ratan
Author Profile Icon Abhishek Ratan
Abhishek Ratan
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Table of Contents (8) Chapters Close

Preface 1. Fundamental Concepts FREE CHAPTER 2. Python for Network Engineers 3. Accessing and Mining Data from Network 4. Web Framework for Automation Triggers 5. Ansible for Network Automation 6. Continuous Integration for Network Engineers 7. SDN Concepts in Network Automation

Conditions and loops


Conditions are checked using a left and right value comparison. The evaluation returns either true or false, and a specific action is performed depending on the result.

There are certain condition operators that are used to evaluate the left and right value comparisons:

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

 

An example of the condition evaluation is as follows:

As we can see, we are checking whether 2>3 (2 is greater that 3). Of course, this would result in false, so the action in the else section is executed. If we reverse the check, 3>2, then the output would have been left value is greater.

In the preceding example, we used the if condition block, which...

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