old_contents: import requests
  
  
  class Request(object):
      """Class is responsible for prepare request query and send reqest to YQL Yahoo API."""
      parameters = {
          'q': '',
          'format': 'json',
          'diagnostics': 'false',
          'env': 'store://datatables.org/alltableswithkeys',
          'callback': ''
      }
      api = 'https://query.yahooapis.com/v1/public/yql'
  
      def prepare_query(self, symbol,  start_date, end_date):
          """Method returns prepared request query for Yahoo YQL API."""
          query = \
              'select * from yahoo.finance.historicaldata where symbol = "%s" and startDate = "%s" and endDate = "%s"' \
              % (symbol, start_date, end_date)
  
          return query
  
      def send(self, symbol, start_date, end_date):
          """Method sends request to Yahoo YQL API."""
          query = self.prepare_query(symbol, start_date, end_date)
  
          self.parameters['q'] = query
          response = requests.get(self.api, params=self.parameters).json()
  
          results = response['query']['results']['quote']
  
          return results
  
new_contents: import requests
  
  
  class Request(object):
      """Class is responsible for prepare request query and sends it to YQL Yahoo API."""
      parameters = {
          'q': '',
          'format': 'json',
          'diagnostics': 'false',
          'env': 'store://datatables.org/alltableswithkeys',
          'callback': ''
      }
      api = 'https://query.yahooapis.com/v1/public/yql'
  
      def prepare_query(self, symbol,  start_date, end_date):
          """Method returns prepared request query for Yahoo YQL API."""
          query = \
              'select * from yahoo.finance.historicaldata where symbol = "%s" and startDate = "%s" and endDate = "%s"' \
              % (symbol, start_date, end_date)
  
          return query
  
      def send(self, symbol, start_date, end_date):
          """Method sends request to Yahoo YQL API."""
          query = self.prepare_query(symbol, start_date, end_date)
  
          self.parameters['q'] = query
          response = requests.get(self.api, params=self.parameters).json()
  
          results = response['query']['results']['quote']
  
          return results
  
subject: Update request.py