def load_tsa_raw(self, datestring, timedelta=0):
"""
read data from raw input files and return TimeseriesArrayLazy object
parameters:
datestring <str> isodate representation of date like 2015-12-31
timedelta <int> amount second to correct raw input timestamps
returns:
<TimeseriesArrayLazy> object wich holds all data of this day
"""
tsa = TimeseriesArrayLazy(self.__index_keynames, self.__value_keynames, datatypes=self.__datatypes)
for rowdict in self.__get_raw_data_dict(datestring, timedelta):
try:
tsa.add(rowdict)
except ValueError as exc:
logging.exception(exc)
logging.error("ValueError by adding this data to TimeseriesArrayLazy: %s", rowdict)
raise exc
except AssertionError as exc:
logging.exception(exc)
logging.error("AssertionError by adding this data to TimeseriesArrayLazy: %s", rowdict)
raise exc
return tsa
