def _parse_csv(self, file_name: str, delimiter: str):
"""
Parses a CSV file and fills out two lists with column headers and data
respectively.
:param file_name: Absolute path to a CSV file.
:param delimiter: Which delimiter is used in the CSV file.
:raises FileNotFoundError: If the supplied file wasn't found.
:raises OSError: If the supplied file couldn't be opened for reading.
"""
if not os.path.isfile(file_name):
raise FileNotFoundError()
with open(file_name, "r", encoding="utf-8") as fin:
reader = csv.DictReader(fin)
for row in reader:
house = House.from_dictionary(row)
self.houses.append(house)
