code: def parse_JSON(self, JSON_string):
          
          if JSON_string is None:
              raise parse_response_error.ParseResponseError('JSON data is None')
          d = json.loads(JSON_string)
          try:
              # -- reference time
              reference_time = d['date']
  
              # -- reception time (now)
              reception_time = timeutils.now('unix')
  
              # -- location
              lon = float(d['lon'])
              lat = float(d['lat'])
              place = location.Location(None, lon, lat, None)
  
              # -- UV intensity
              uv_intensity = float(d['value'])
  
          except KeyError:
              raise parse_response_error.ParseResponseError(
                        ''.join([__name__, ': impossible to parse UV Index']))
  
          return uvindex.UVIndex(reference_time, place, uv_intensity,
                                 reception_time)
docs: Parses an *UVIndex* instance out of raw JSON data. Only certain
          properties of the data are used: if these properties are not found or
          cannot be parsed, an error is issued.
  
          :param JSON_string: a raw JSON string
          :type JSON_string: str
          :returns: an *UVIndex* instance or ``None`` if no data is available
          :raises: *ParseResponseError* if it is impossible to find or parse the
              data needed to build the result, *APIResponseError* if the JSON
              string embeds an HTTP status error