Pick a formatting standard and apply it to the entire repo

[sconklin]

Code formatting is inconsistent. Apply a code formatter. If there's a recommended gnuradio formatting, use that.

[dkozel]

GNU Radio's guidance for Python formatting is a recommendation but there is no formal formatter being run currently.
https://github.com/gnuradio/greps/blob/master/grep-0001-coding-guidelines.md#python-specific-guidelines

I suggest running autopep8 with the default mode (whitespace only), committing that, and then running it with increasing levels of aggressive to see what automatic code improvements it produces.
https://pypi.org/project/autopep8/

pylint is a good tool as well, but is best guidance for manual code improvements.