Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Some large packages such as matplotlib or django have hundreds of modules inside them, and developers usually categorize the related modules into a sub-directories."

A block of code is set as follows:

from netmiko import ConnectHandler
from devices import R1,SW1,SW2,SW3,SW4

nodes = [R1,SW1,SW2,SW3,SW4]

for device in nodes:
    net_connect = ConnectHandler(**device)
    output = net_connect.send_command("show run")
    print output

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

hostname {{hostname}}

Any command-line input or output is written as follows:

pip install jinja2 

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: 

"Choose your platform from the Download page, and either the x86 or x64 version."

Warnings or important notes appear like this.

Tips and tricks appear like this.