In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning. Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "For the visualization depicted earlier in this chapter, the matplotlib library was used."

A block of code is set as follows:

import sys
sys.path.append('..')
sys.path.append('../../common')
import knn # noqa
import common # noqa

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

$ python knn_to_data.py mary_and_temperature_preferences.data mary_and_temperature_preferences_completed.data 1 5 30 0 10

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "In order to download new modules, we will go to Files | Settings | Project Name | Project Interpreter."