This book uses the following typographical conventions:
Introduces new terms and indicates URLS, variables or user-defined files and directories, programs, file extensions, filenames, hostnames, directory or folder names, and UNC pathnames.
Indicates Python language elements, command-line computer output, code examples, commands, keywords, functions, modules, classes, interfaces, instances, collections, objects, properties, methods, packages, and constants.
Constant width italic
Indicates placeholder names in syntax specifications and registry keys.
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