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