Conventions

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: "It should be noted that the type() function has another use as well."

A block of code is set as follows:

import abc
import importlib


class Plugins(abc.ABCMeta):
    plugins = dict()

    def __new__(metaclass, name, bases, namespace):
        cls = abc.ABCMeta.__new__(
            metaclass, name, bases, namespace)

Any command-line input or output is written as follows where the >>> indicate the Python console and the # indicates a regular Linux/Unix shell:

>>> class Spam(object):
…     eggs = 'my eggs'

>>> Spam = type('Spam', (object,), dict(eggs='my eggs'))

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.