code: def _parse_api_options(self, options, query_string=False):
          
          api_options = self._select_options(options, self.API_OPTIONS)
          if query_string:
              # Prefix all options with "opt_"
              query_api_options = {}
              for key in api_options:
                  # Transform list/tuples into comma separated list
                  if isinstance(api_options[key], (list, tuple)):
                      query_api_options[
                          'opt_' + key] = ','.join(api_options[key])
                  else:
                      query_api_options[
                          'opt_' + key] = api_options[key]
              return query_api_options
          else:
              return api_options
docs: Select API options out of the provided options object.
  
          Selects API string options out of the provided options object and
          formats for either request body (default) or query string.