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: "Use the loadmat() function from scipy to retrieve the voxels."

A block of code is set as follows:

import scipy.io as io
voxels = io.loadmat("path to .mat file")['instance']

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

pip install -r requirements.txt

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