def __init__(
self,
db_name,
db_ext=None,
read_only=False,
clear=False,
cache_size=10 * 1024,
immutable_vals=False,
stringify_keys=False,
cache_misses=True,
read_pool_size=0,
**kwargs
):
self._db_name = db_name
self._db_ext = db_ext if db_ext != None else get_default_file_ext()
abs_dir_path = os.path.dirname(os.path.abspath(db_name))
dir_present = os.path.exists(abs_dir_path)
if not dir_present:
try:
os.makedirs(abs_dir_path)
except OSError:
pass
self._db_full_path = ".".join((os.path.abspath(db_name), self._db_ext))
file_present = os.path.exists(self._db_full_path)
self.flag = "n" if clear else "r" if read_only and file_present else "c"
self._database = shelve.open(self._db_full_path, flag=self.flag)
self.closed = False
UnorderedCachedSet.__init__(
self,
self._database,
cache_size=cache_size,
read_only=read_only,
immutable_vals=immutable_vals,
stringify_keys=stringify_keys,
cache_misses=cache_misses,
read_pool_size=read_pool_size,
**kwargs
)
def _add_init_kwargs(self, kwargs):
kwargs["db_name"] = self._db_name
kwargs["db_ext"] = self._db_ext
UnorderedCachedSet._add_init_kwargs(self, kwargs)
