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: "Kivy application's entry point is customarily called main.py."

A block of code is set as follows:

from kivy.app import App

class HelloApp(App):
    pass

if __name__ == '__main__':
    HelloApp().run()

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

# In Python code
LabelBase.register(name="Roboto",
    fn_regular="Roboto-Regular.ttf",
    fn_bold="Roboto-Bold.ttf",
    fn_italic="Roboto-Italic.ttf",
    fn_bolditalic="Roboto-BoldItalic.ttf")

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

pip install -U twisted

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: "The first event handler is for the Start and Stop buttons."