The examples now have the release_displays() function call in the proper location.
To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).
Read the [docs](https://circuitpython.readthedocs.io/projects/st7789/en/latest/) for info on how to use it.