code: def get_cytoband_names():
      
      return [
          n.replace(".json.gz", "")
          for n in pkg_resources.resource_listdir(__name__, _data_dir)
          if n.endswith(".json.gz")
      ]
docs: Returns the names of available cytoband data files
  
      >> get_cytoband_names()
      ['ucsc-hg38', 'ucsc-hg19']