adding pid file utility
adding beginings of control panel
adding global config
removed unneeded imports
syntax fixes
reduce dict lookups in convert_channel_to_frequency
use 'in' instead of re.search
directly return result of logic expression
describe range with negative step, instead of reverse
use shorter list comp
remove unneeded imports
use dispatch dict for switch-case
remove unneeded imports
use dict.get() instead of 'in' and direct access