code: def parse_JSON(self, JSON_string):
          
          if JSON_string is None:
              raise parse_response_error.ParseResponseError('JSON data is None')
          d = loads(JSON_string)
          # Check if server returned errors: this check overcomes the lack of use
          # of HTTP error status codes by the OWM API 2.5. This mechanism is
          # supposed to be deprecated as soon as the API fully adopts HTTP for
          # conveying errors to the clients
          if 'message' in d and 'cod' in d:
              if d['cod'] == "404":
                  print("OWM API: observation data not available - response " \
                      "payload: " + dumps(d))
                  return None
              else:
                  raise api_response_error.APIResponseError(
                                        "OWM API: error - response payload: " + dumps(d), d['cod'])
          try:
              place = location.location_from_dictionary(d)
          except KeyError:
              raise parse_response_error.ParseResponseError(
                                        ''.join([__name__, ': impossible to ' \
                                         'read location info from JSON data']))
          try:
              w = weather.weather_from_dictionary(d)
          except KeyError:
              raise parse_response_error.ParseResponseError(
                                        ''.join([__name__, ': impossible to ' \
                                         'read weather info from JSON data']))
          current_time = int(round(time()))
          return observation.Observation(current_time, place, w)
docs: Parses an *Observation* 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 *Observation* 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