ToDo: Validate CAM number and Valid Mode Values

def __vCmdSetCamExposureMode(self, args):
        '''ToDo: Validate CAM number and Valid Mode Values'''
        if len(args) == 1:
            for cam in self.camera_list:
                cam.boSetExposureMode(args[0])
        elif len(args) == 2:
            cam = self.camera_list[int(args[1])]
            cam.boSetExposureMode(args[0])
        else:
            print ("Usage: setCamExposureMode MODE [CAMNUMBER], Valid values for MODE: Program Auto, Aperture, Shutter, Manual, Intelligent Auto, Superior Auto")