code: def _add_thousand_g(self, variant_obj, info_dict):
          
          thousand_g = info_dict.get('1000GAF')
          if thousand_g:
              logger.debug("Updating thousand_g to: {0}".format(
                  thousand_g))
              variant_obj.thousand_g = float(thousand_g)
              variant_obj.add_frequency('1000GAF', variant_obj.get('thousand_g'))
docs: Add the thousand genomes frequency
          
          Args:
              variant_obj (puzzle.models.Variant)
              info_dict (dict): A info dictionary