code: def db_get_val(self, table, record, column):
          
          command = ovs_vsctl.VSCtlCommand('get', (table, record, column))
          self.run_command([command])
          assert len(command.result) == 1
          return command.result[0]
docs: Gets values of 'column' in 'record' in 'table'.
  
          This method is corresponding to the following ovs-vsctl command::
  
              $ ovs-vsctl get TBL REC COL