code: def process_response(self, resp, multiple_rates):
          
          self._check_for_exceptions(resp, multiple_rates)
  
          rates = {}
          for result in resp['results']:
              rate = ZipTaxClient._cast_tax_rate(result['taxSales'])
              rates[result['geoCity']] = rate
          if not multiple_rates:
              return rates[list(rates.keys())[0]]
          return rates
docs: Get the tax rate from the ZipTax response