Conventions used

There are a number of text conventions used throughout this book.

Code in text: 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: "This sets one LED at led_number to the specified color."

A block of code is set as follows:

cyan_rgb = [int(c * 255) for c in cyan]

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

right_distance = self.robot.right_distance_sensor.distance
  # Display this
            self.display_state(left_distance, right_distance) 

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

>>> r.leds.show()

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select 4 for Other USB Microphone and try the sound test."

Tips or important notes

Appear like this.