def open_dev( ):
   ''' Opens the slide switch SW device
   
   :return: 1 on success, else 0
   '''


def read( ):
   ''' Reads the slide switch SW device
   
   :return: integer reflecting the SW switch settings. If no switches are set 
      returns 0. If all switches are set returns 0b1111111111
   '''


def close( ):
   ''' Closes the slide switch SW device
   
   :return: none
   '''


