python: apply settings from black for formatting
python: apply settings from black for formatting

https://pypi.org/project/black/ is the uncompromising Python code formatter.
We will soon use pre-commit hooks to make sure any code complies with
the formatter. There are instructions on that page for formatter
integrations with popular editors.

Signed-off-by: Robin Getz <c66e5a86ef9317cf35cecb2ed063996b2100ed4b@analog.com>

analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio