code: def _get_file_lists(self):
          
          self.cam0_files = sorted(glob.glob(
              os.path.join(self.sequence_path, 'image_0',
                           '*.{}'.format(self.imtype))))
          self.cam1_files = sorted(glob.glob(
              os.path.join(self.sequence_path, 'image_1',
                           '*.{}'.format(self.imtype))))
          self.cam2_files = sorted(glob.glob(
              os.path.join(self.sequence_path, 'image_2',
                           '*.{}'.format(self.imtype))))
          self.cam3_files = sorted(glob.glob(
              os.path.join(self.sequence_path, 'image_3',
                           '*.{}'.format(self.imtype))))
          self.velo_files = sorted(glob.glob(
              os.path.join(self.sequence_path, 'velodyne',
                           '*.bin')))
  
          # Subselect the chosen range of frames, if any
          if self.frames is not None:
              self.cam0_files = utils.subselect_files(
                  self.cam0_files, self.frames)
              self.cam1_files = utils.subselect_files(
                  self.cam1_files, self.frames)
              self.cam2_files = utils.subselect_files(
                  self.cam2_files, self.frames)
              self.cam3_files = utils.subselect_files(
                  self.cam3_files, self.frames)
              self.velo_files = utils.subselect_files(
                  self.velo_files, self.frames)
docs: Find and list data files for each sensor.