code: def request_many(self, queries, source='Datastream',
                       fields=None, options=None, symbol_set=None, tag=None):
          
          if self.show_request:
              print(('Requests:', queries))
  
          if not isinstance(queries, list):
              queries = [queries]
  
          req = self.client.factory.create('ArrayOfRequestData')
          req.RequestData = []
          for q in queries:
              rd = self.client.factory.create('RequestData')
              rd.Source = source
              rd.Instrument = q
              if fields is not None:
                  rd.Fields = self.client.factory.create('ArrayOfString')
                  rd.Fields.string = fields
              rd.SymbolSet = symbol_set
              rd.Options = options
              rd.Tag = tag
  
              req.RequestData.append(rd)
  
          return self.client.service.RequestRecords(self.userdata, req, 0)[0]
docs: General function to retrieve one record in raw format.
  
             query - list of query strings for DWE system.
             source - The name of datasource (default: "Datastream")
             fields - Fields to be retrieved (used when the requester does not want all
                      fields to be delivered).
             options - Options for specific data source. Many of datasources do not require
                       opptions string. Refer to the documentation of the specific
                       datasource for allowed syntax.
             symbol_set - The symbol set used inside the instrument (used for mapping
                          identifiers within the request. Refer to the documentation for
                          the details.
             tag - User-defined cookie that can be used to match up requests and response.
                   It will be returned back in the response. The string should not be
                   longer than 256 characters.
             NB! source, options, symbol_set and tag are assumed to be identical for all
                 requests in the list