code: def load_core_file(core_fp):
      
      with open(core_fp, "rU") as in_f:
          return {otu_name(ast.literal_eval(line.split("\t")[1]))
                  for line in in_f.readlines()[1:]}
docs: For core OTU data file, returns Genus-species identifier for each data
      entry.
      :type core_fp: str
      :param core_fp: A file containing core OTU data.
      :rtype: str
      :return: Returns genus-species identifier based on identified taxonomical
               level.