def __delitem__(self, path):
test = self._node[datapath(path)]
if owner(test) == self._codelet.path:
del self._node[datapath(path)]
else:
raise ValueError("%s trying to remove data created by %s"
% (str(self._codelet.path), str(owner(test))))
def __setitem__(self, path, value):
path = datapath(path)
needs_stamp = False
if isinstance(value, (DataGroup, DatasetWrapper)):
value = value._node
else:
needs_stamp = True
self._node[path] = value
if needs_stamp:
node = self._node[path]
stamp(node, "data", self._codelet.dependency_attributes())
def __getitem__(self, path_or_ref):
if isstring(path_or_ref):
path = datapath(path_or_ref)
else:
path = self._node[path_or_ref].name
assert path.startswith('/data')
path = path.split('/')
if path[0] == '':
# datapath() ensures that path must start with
# ['', 'data'] in this case. Move up the parent
# chain to the root of the /data hierarchy.
path = path[2:]
node = self
while node is not node.parent:
node = node.parent
else:
node = self
for element in path:
node = node._wrap_and_track_dependencies(node._node[element])
return node
def require_dataset(self, path, *args, **kwargs):
ds = self._node.require_dataset(datapath(path), *args, **kwargs)
self._stamp_new_node(ds, "data")
return DatasetWrapper(self, ds, self._codelet)
def require_group(self, path):
group = self._node.require_group(datapath(path))
self._stamp_new_node(group, "group")
return DataGroup(self._paper, self, group,
self._codelet, self._data_item)