def match_var(regex):
 cmd = _traffic_line('-m', regex)
 log.debug('Running: %s', cmd)
 return _subprocess(cmd)

def match_var ( regex ) : cmd = _traffic_line ( '-m' , regex ) log . debug ( 'Running: %s' , cmd ) return _subprocess ( cmd )
display the current values of all performance statistics or configuration variables whose names match the given regular expression .