code: def get_rate(self, zipcode, city=None, state=None, multiple_rates=False):
          
          data = self.make_request_data(zipcode, city, state)
  
          r = requests.get(self.url, params=data)
          resp = r.json()
  
          return self.process_response(resp, multiple_rates)
docs: Finds sales tax for given info.
          Returns Decimal of the tax rate, e.g. 8.750.