Hands-On Data Science with the Command Line电子书

Title Page

Copyright and Credits

Hands-On Data Science with the Command Line

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Contributors

About the authors

About the reviewers

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Preface

Who this book is for

What this book covers

To get the most out of this book

Download the example code files

Conventions used

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Data Science at the Command Line and Setting It Up

History of the command line

We don't want to BaSH other shells, but...

Language-focused shells

So, why the command line?

Getting set up with Windows 10

Getting set up on OS X

Getting set up on Ubuntu Linux

Getting set up with Docker

Summary

Essential Commands

Essential commands

Navigating the command line

Getting help

Customizing the shell

Summary

Shell Workflows, and Data Acquisition and Massaging

Download the data

Using the file command

Performing a word count

Introduction to cut

Detached processing

How to background a process

Disregarding SIGHUP

Terminal multiplexers

Introduction to screen

Sharing a screen session between multiple users

Introduction to tmux

Summary

Bash Functions and Data Visualization

My first shell script

She bangs, she bangs!

Function arguments, positional parameters, and IFS

Prompt me baby one more time

Feed the function input!

Down the rabbit hole of IFS and bash arrays

Advanced shell scripting magic

Here be dragons, ye be warned

Text injection of text files

Bash networks for fun and profit!

From dumb Terminal to glam Terminal

Who, what, where, why, how?

Enter the mind's eye

Summary

Loops, Functions, and String Processing

Once, twice, three times a lady loops

It's the end of the world as we know it while and until

The simple case

Pay no heed to the magician redirecting your attention

Regular expressions and grep

Exact matches

Character sets

Dot the i (or anything else)

Capture groups

Either or, neither nor

Repetition

Other operators

Putting it all together

awk, sed, and tr

awk

sed

tr

sort and uniq

sort

uniq

Summary

SQL, Math, and Wrapping it up

cut and viewing data as columnar

WHERE clauses

Join, for joining data

Group by and ordering

Simulating selects

Keys to the kingdom

Using SQLite

Math in bash itself

Using let

Basic arithmetic

Double-parentheses

bc, the unix basic calculator

Math in (g)awk

Python (pandas, numpy, scikit-learn)

Analyzing weather data in bash

Summary

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