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: “To run this code, be sure to send the pio_encoders.py library, the updated robot.py file, and then measure_fixed_time.py.”

A block of code is set as follows:

import time
import board
import digitalio
led = digitalio.DigitalInOut(board.LED)
led.direction = digitalio.Direction.OUTPUT
while True:
    led.value = True
    time.sleep(0.5)
    led.value = False
    time.sleep(0.5)

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

>>> print("Hello, world!")
Hello, World!
>>>

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

code.py output:
4443 4522

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Launch Mu Editor, and when it is running, click on the Mode button. From this, select CircuitPython.”

Tips or important notes

Appear like this.