code: def _get_data_raw(self):
          
          # Import need to be here so we can monkeypatch urlopen for testing and avoid
          # downloading live data for testing
          try:
              from urllib.request import urlopen
          except ImportError:
              from urllib2 import urlopen
  
          with closing(urlopen(self.ftpsite + self.site_id + self.suffix + '.zip')) as url:
              f = ZipFile(BytesIO(url.read()), 'r').open(self.site_id + self.suffix)
  
          lines = [line.decode('utf-8') for line in f.readlines()]
  
          body, header, dates_long, dates = self._select_date_range(lines)
  
          return body, header, dates_long, dates
docs: Download observations matching the time range.
  
          Returns a tuple with a string for the body, string for the headers,
          and a list of dates.