def _load_problems_from_file(self, filepath:str) -> list[Problem,...]:
# assume that filepath exists
if os.path.getsize(filepath) == 0:
return []
with open(filepath, 'r') as fid:
data = json.loads(fid.read())
return [Problem.from_json(p) for p in data.values()]
def _lazy_init(self, filepath: str):
if not os.path.exists(filepath) or os.path.getsize(filepath) == 0:
self._data = dict()
self._next_id = 1
self._problems = tuple()
self._sectors = dict()
else:
with open(filepath, 'r') as fid:
self._data = json.loads(fid.read())
self._next_id = int(self._data['next_id'])
self._problems = tuple((Problem.from_json(p)
for p in self._data['problems'].values()))
self._sectors = self._data['sectors']
