How to do it...

Let's perform the following steps:

1. First, run the following lines of code in the REPL. The value of cpx.button_a is False here because the button is not pressed:

>>> from adafruit_circuitplayground.express import cpx
>>> cpx.button_a
False

1. Keep push button A pressed while you run the following code block. This will change the value to True:

>>> cpx.button_a
True

1. Then, add the following code to the main.py file and this will repeatedly print the state of push button A on execution:

from adafruit_circuitplayground.express import cpx
import time

while True:
    print(cpx.button_a)
    time.sleep(0.05)