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: "The read_image function takes an image as input and returns a NumPy array."

A block of code is set as follows:

import re
import numpy as np
from PIL import Image

Bold: Indicates a new term, an important word, or words that you see onscreen.