def _receive_reference_response(self, fields): response_events = get_response_events(self._session) elements = [] for ev in response_events: check_event_for_errors(ev) security_data_array = extract_security_data(ev) check_security_data_for_errors(security_data_array) for i in range(security_data_array.numValues()): security_data = security_data_array.getValueAsElement(i) check_security_data_for_errors(security_data) field_data_array = security_data.getElement(FIELD_DATA) for field_name in fields: array = field_data_array.getElement(field_name) for element in array.values(): keys_values_dict = {} for elem in element.elements(): key = elem.name().__str__() value = element.getElementAsString(key) keys_values_dict[key] = value elements.append(keys_values_dict) return elements
def _receive_reference_response(self, tickers, fields): response_events = get_response_events(self._session) tickers_fields_container = QFDataFrame(index=tickers, columns=fields) for ev in response_events: check_event_for_errors(ev) security_data_array = extract_security_data(ev) check_security_data_for_errors(security_data_array) for i in range(security_data_array.numValues()): security_data = security_data_array.getValueAsElement(i) check_security_data_for_errors(security_data) security_name = security_data.getElementAsString(SECURITY) ticker = BloombergTicker.from_string(security_name) field_data_array = security_data.getElement(FIELD_DATA) for field_name in fields: try: value = field_data_array.getElementAsFloat(field_name) except blpapi.exception.InvalidConversionException: value = field_data_array.getElementAsString(field_name) except blpapi.exception.NotFoundException: value = np.nan tickers_fields_container.loc[ticker, field_name] = value return tickers_fields_container
def _receive_historical_response( self, requested_tickers: Sequence[BloombergTicker], requested_fields: Sequence[str]): ticker_str_to_ticker: Dict[str, BloombergTicker] = { t.as_string(): t for t in requested_tickers } response_events = get_response_events(self._session) tickers_data_dict = defaultdict( lambda: QFDataFrame(columns=requested_fields)) for event in response_events: try: check_event_for_errors(event) security_data = extract_security_data(event) check_security_data_for_errors(security_data) field_data_array = security_data.getElement(FIELD_DATA) dates = [ to_datetime(x.getElementAsDatetime(DATE)) for x in field_data_array.values() ] dates_fields_values = QFDataFrame(np.nan, index=dates, columns=requested_fields) for field_name in requested_fields: dates_fields_values.loc[:, field_name] = [ self._get_float_or_nan(data_of_date_elem, field_name) for data_of_date_elem in field_data_array.values() ] security_name = security_data.getElementAsString(SECURITY) try: ticker = ticker_str_to_ticker[security_name] tickers_data_dict[ticker] = tickers_data_dict[ ticker].append(dates_fields_values) except KeyError: self.logger.warning( f"Received data for a ticker which was not present in the request: " f"{security_name}. The data for that ticker will be excluded from parsing." ) except BloombergError as e: self.logger.error(e) return tickers_dict_to_data_array(tickers_data_dict, list(tickers_data_dict.keys()), requested_fields)
def _receive_historical_response(self, requested_tickers, requested_fields): response_events = get_response_events(self._session) # mapping: ticker -> DataArray[dates, fields] tickers_data_dict = dict() # type: Dict[BloombergTicker, pd.DataFrame] for event in response_events: check_event_for_errors(event) security_data = extract_security_data(event) security_name = security_data.getElementAsString(SECURITY) ticker = BloombergTicker.from_string(security_name) try: check_security_data_for_errors(security_data) field_data_array = security_data.getElement(FIELD_DATA) field_data_list = [ field_data_array.getValueAsElement(i) for i in range(field_data_array.numValues()) ] dates = [ pd.to_datetime(x.getElementAsDatetime(DATE)) for x in field_data_list ] data = np.empty((len(dates), len(requested_fields))) data[:] = np.nan dates_fields_values = pd.DataFrame(data, index=dates, columns=requested_fields) for field_name in requested_fields: dates_fields_values.loc[:, field_name] = [ self._get_float_or_nan(data_of_date_elem, field_name) for data_of_date_elem in field_data_list ] tickers_data_dict[ticker] = dates_fields_values except BloombergError: self.logger.exception( "Error in the received historical response") return tickers_dict_to_data_array(tickers_data_dict, requested_tickers, requested_fields)
def _receive_futures_response( self, random_ticker_string_to_future_ticker: Dict[str, BloombergFutureTicker]): response_events = get_response_events(self._session) ticker_to_futures_chain = {} def data_is_correct(data): if data.hasElement(SECURITY_ERROR): return False if security_data.hasElement(FIELD_EXCEPTIONS): field_exceptions = data.getElement(FIELD_EXCEPTIONS) if field_exceptions.numValues() > 0: return False return True for event in response_events: check_event_for_errors(event) security_data_array = extract_security_data(event) for i in range(security_data_array.numValues()): security_data = security_data_array.getValueAsElement(i) if data_is_correct(security_data): security_name = security_data.getElementAsString(SECURITY) family_id_template = random_ticker_string_to_future_ticker[ security_name].family_id # Family id are in the following form: CT{} Comdty -> {} should be replaced with a correct month # code regex_template = family_id_template.replace( "{}", "[A-Z][0-9]{1,2}") future_chain_array = security_data.getElement( FIELD_DATA).getElement(FUT_CHAIN) ticker_to_futures_chain[security_name] = [] for j in range(future_chain_array.numValues()): future_ticker = future_chain_array.getValueAsElement(j) ticker_value = future_ticker.getElementAsString( "Security Description") if re.match(regex_template, ticker_value): ticker_to_futures_chain[security_name].append( ticker_value) return ticker_to_futures_chain
def _receive_reference_response(self, tickers, fields): ticker_str_to_ticker: Dict[str, BloombergTicker] = { t.as_string(): t for t in tickers } response_events = get_response_events(self._session) tickers_fields_container = QFDataFrame(index=tickers, columns=fields) for ev in response_events: try: check_event_for_errors(ev) security_data_array = extract_security_data(ev) check_security_data_for_errors(security_data_array) for security_data in security_data_array.values(): check_security_data_for_errors(security_data) field_data_array = security_data.getElement(FIELD_DATA) security_name = security_data.getElementAsString(SECURITY) try: ticker = ticker_str_to_ticker[security_name] for field_name in fields: value = self._parse_value(field_data_array, field_name) tickers_fields_container.loc[ticker, field_name] = value except KeyError: self.logger.warning( f"Received data for a ticker which was not present in the request: " f"{security_name}. The data for that ticker will be excluded from parsing." ) except BloombergError as e: self.logger.error(e) return tickers_fields_container