def __init__(self, store, path=None, read_only=False, chunk_store=None,
cache_attrs=True, synchronizer=None):
self._store = store
self._chunk_store = chunk_store
self._path = normalize_storage_path(path)
if self._path:
self._key_prefix = self._path + '/'
else:
self._key_prefix = ''
self._read_only = read_only
self._synchronizer = synchronizer
# guard conditions
if contains_array(store, path=self._path):
raise ContainsArrayError(path)
# initialize metadata
try:
mkey = self._key_prefix + group_meta_key
meta_bytes = store[mkey]
except KeyError:
raise GroupNotFoundError(path)
else:
meta = decode_group_metadata(meta_bytes)
self._meta = meta
# setup attributes
akey = self._key_prefix + attrs_key
self._attrs = Attributes(store, key=akey, read_only=read_only,
cache=cache_attrs, synchronizer=synchronizer)
# setup info
self._info = InfoReporter(self)
def __init__(self,
store,
path=None,
read_only=False,
chunk_store=None,
cache_attrs=True,
synchronizer=None,
zarr_version=None):
store: BaseStore = _normalize_store_arg(store,
zarr_version=zarr_version)
if zarr_version is None:
zarr_version = getattr(store, '_store_version',
DEFAULT_ZARR_VERSION)
if chunk_store is not None:
chunk_store: BaseStore = _normalize_store_arg(
chunk_store, zarr_version=zarr_version)
self._store = store
self._chunk_store = chunk_store
self._path = normalize_storage_path(path)
if self._path:
self._key_prefix = self._path + '/'
else:
self._key_prefix = ''
self._read_only = read_only
self._synchronizer = synchronizer
self._version = zarr_version
if self._version == 3:
self._data_key_prefix = data_root + self._key_prefix
self._data_path = data_root + self._path
self._hierarchy_metadata = _get_hierarchy_metadata(
store=self._store)
self._metadata_key_suffix = _get_metadata_suffix(store=self._store)
# guard conditions
if contains_array(store, path=self._path):
raise ContainsArrayError(path)
# initialize metadata
try:
mkey = _prefix_to_group_key(self._store, self._key_prefix)
assert not mkey.endswith("root/.group")
meta_bytes = store[mkey]
except KeyError:
if self._version == 2:
raise GroupNotFoundError(path)
else:
implicit_prefix = meta_root + self._key_prefix
if self._store.list_prefix(implicit_prefix):
# implicit group does not have any metadata
self._meta = None
else:
raise GroupNotFoundError(path)
else:
self._meta = self._store._metadata_class.decode_group_metadata(
meta_bytes)
# setup attributes
if self._version == 2:
akey = self._key_prefix + attrs_key
else:
# Note: mkey doesn't actually exist for implicit groups, but the
# object can still be created.
akey = mkey
self._attrs = Attributes(store,
key=akey,
read_only=read_only,
cache=cache_attrs,
synchronizer=synchronizer)
# setup info
self._info = InfoReporter(self)