What you need to know about Python

66 Pages·2016·1.645 MB·English

by  Pierluigi Riti

What You Need to Know about
Python
The absolute essentials you need to get Python up and
running
Pierluigi Riti
BIRMINGHAM - MUMBAI
What You Need to Know about Python
Copyright © 2016 Packt Publishing
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First Published: August 2016
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About the Author
Pierluigi Riti is a cloud and DevOps engineer. He started development on a
Commodore 64 when he was only 10 years old, and then continued to work with
software and architecture. He moved on to DevOps and the cloud later. Pierluigi also
specializes in continuous integration and continuous delivery, and is interested in all
cloud technologies and architectures.
You can contact him at [e-mail].
I would like to thank my wife, Mara Ester, for giving me the best
things in my life, our two kids, Nicole and Mattia. I would also
like to thank the Packt Publishing team, especially Aishwarya and
Larissa, without whose work this book would never have existed.
About the Reviewer
Sanjeev Jaiswal is a computer graduate with 5 years of industrial experience. He
basically uses Perl and GNU/Linux for his day-to-day work. He also teaches Drupal
and WordPress CMS to bloggers. He first developed an interest in web application
penetration testing in 2013; he is currently working on projects involving penetration
testing, source code review, and log analysis, where he provides analysis and
defense against various kinds of web-based attacks.
Sanjeev loves teaching technical concepts to engineering students and IT
professionals, and has been teaching for the last 6 years in his leisure time. He
founded Alien Coders (http://www.aliencoders.org), based on the learning
through sharing principle, for computer science students and IT professionals in
2010, which became a huge hit in India among engineering students.
He usually uploads technical videos to YouTube under the Alien Coders tag. He has
got a huge fan base at his site because of his simple but effective way of teaching
and his philanthropic nature toward students. You can follow him on Facebook at
http://www.facebook.com/aliencoders and on Twitter at @aliencoders.
He wrote Instant PageSpeed Optimization for Packt Publishing, and looks forward to
authoring or reviewing more books for Packt Publishing and other publishers.
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Table of Contents
Overview v
Chapter 1: Python in 2016 1
Getting started with coding 2
Storing and manipulating data in Python 2
Lists 3
Tuples 4
Dictionary 4
Sets 5
For loops 5
Functions 5
Using object-oriented programming in Python 6
Class methods 6
Chapter 2: Cloud and Web Development 8
Web applications with Django 8
Your first project with Django 9
The Django server 10
Our first Django app 11
Designing the app 12
Models in Django 12
Configuring the application 13
Migration 14
Creating the first UI 16
Django templates 17
Using the AWS SDK 18
REST web services with Flask 19
[ i ]
Table of Contents
Chapter 3: Data Visualization with Python 22
Installing Jupyter 22
Description of Jupyter Notebook 23
matplotlib 24
Creating our first notebook 25
Other kinds of cell 28
Chapter 4: Introduction to DevOps 30
The challenge of DevOps 30
Working with DevOps 31
What is Fabric? 31
Installing Fabric 32
The Fabric script 33
Using Fabric for DevOps 34
The Fabric API 34
The core API 34
Color output functions 34
Context managers 35
Decorators 35
Networks 36
Operations 36
Mixing it all together 37
SaltStack 39
Installing SaltStack 39
Configuring the client 40
Salt state 43
Chapter 5: Cheat Sheet 45
Python 45
Reserved words 45
Basic types 46
Ordered sequences 46
Immutable sequences 46
Key containers 46
Identifiers 46
Variables 47
List methods 47
String methods 47
Comments 48
[ ii ]
Table of Contents
Conditional statements 48
if 48
if…else 48
if…elif…else 48
Loop statements 49
for 49
while 49
Django 49
Starting a project 49
Creating a new application 49
Running the server 49
SaltStack 50
Key management 50
Checking connectivity 50
Showing all packages in the minion 50
Executing a command 50
Installing a package 50
Checking the network interface 51
Applying a state 51
Summary 51
[ iii ]