class Cache(AbstractContextManager):
def __init__(self, dbname=DEFAULT_DBNAME):
self._dbname = dbname
self._backing = None
def __enter__(self) -> MutableMapping[str, Any]:
self._backing = SqliteDict(
self._dbname,
autocommit=True,
encode=cloudpickle.dumps,
decode=cloudpickle.loads,
)
return self._backing.__enter__()
def __exit__(self, exc_type, exc_value, traceback):
self._backing.__exit__(exc_type, exc_value, traceback)
del self._backing
