I have Dump 1090-mutability (ver 1.15 ~dev) running on a RPI3 using the latest Jessie Lite March 2017 image (python ver 2.7.9) which is running fine and outputting data with no problems.
I have tried to run lignumaqua's script from the first page, but keep running into errors, which are beyond my experience
The first error which came up was 'SyntaxError: Non-ASCII character '\xc2' in file ./set-gain.py on line 13, but no encoding declared; see http://python.org/dev/peps/pep-0263/
for details' and after looking on the interweb came across an answer to add '# -*- coding: utf-8 -*-' to the file - This I have done on the second line.
The script now gets further, but now runs into this error - 'File "./set-gain.py", line 15 ...... print "test", i+1, "of", ntests' - I am now stumped!!!
Any help/suggestions much appreciated.