This library now uses `time.sleep(0)` instead of `pass` to aid execution in multithreaded Blinka environments.
To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).
To use in CPython, `pip3 install adafruit-circuitpython-busdevice`.
Read the [docs](http://circuitpython.readthedocs.io/projects/busdevice/en/latest/) for info on how to use it.