code: def data_cleanup(data):
      
      data.stats_dfs.s3 = data._build_stat("s3")
      data.stats_files.s3 = os.path.join(data.dirs.clusts, "s3_cluster_stats.txt")
      with io.open(data.stats_files.s3, 'w') as outfile:
          data.stats_dfs.s3.to_string(
              buf=outfile,
              formatters={
                  'merged_pairs':'{:.0f}'.format,
                  'clusters_total':'{:.0f}'.format,
                  'clusters_hidepth':'{:.0f}'.format,
                  'filtered_bad_align':'{:.0f}'.format,
                  'avg_depth_stat':'{:.2f}'.format,
                  'avg_depth_mj':'{:.2f}'.format,
                  'avg_depth_total':'{:.2f}'.format,
                  'sd_depth_stat':'{:.2f}'.format,
                  'sd_depth_mj':'{:.2f}'.format,
                  'sd_depth_total':'{:.2f}'.format
              })
docs: cleanup / statswriting function for Assembly obj