code: def do_menu(self, line):
          
          print('\ta\t\tAnalog measurement.\tEnter index and value as arguments.')
          print('\ta2\t\tAnalog 2 for MMDC.Vol (index 4).')
          print('\tb\t\tBinary measurement.\tEnter index and value as arguments.')
          print('\tb0\t\tBinary False for MMDC1.Amp.range (index 6).')
          print('\tc\t\tCounter measurement.\tEnter index and value as arguments.')
          print('\td\t\tDoubleBit DETERMINED_ON.\tEnter index as an argument.')
          print('\thelp\t\tDisplay command-line help.')
          print('\tmenu\t\tDisplay this menu.')
          print('\tquit')
docs: Display a menu of command-line options. Command syntax is: menu