def _get_node(self, node_path):
core.validate_node_path(node_path)
if node_path.startswith(core.NODE_PATH_SEPARATOR):
node_path = node_path[1:]
node = self._root
for name in core.explode(node_path):
node = node[self._node][name]
return node
def create_node(self, node_path):
"""
Create a node at the end of the given path; all but the final node in the path must already exist.
"""
core.validate_node_path(node_path)
existing, new = core.split(node_path)
existing_node = self._get_node(existing)
existing_node[self._node][new] = {self._node: {}, self._array: {}}
def _get_node(self, node_path):
if self.closed:
raise OSError("I/O operation on closed file")
node = self._root
if node_path != '':
core.validate_node_path(node_path)
for name in core.explode(node_path):
node = node.groups[name]
return node
def _get_node(self, node_path):
if self.closed:
raise IOError("I/O operation on closed file")
if node_path != '':
core.validate_node_path(node_path)
full_path = os.path.join(self._root, *core.explode(node_path))
if not os.path.isdir(full_path):
raise ValueError("Invalid path: {}".format(full_path))
return full_path
def test_validate_node_path():
for bad in utilities.bad_node_paths:
try:
core.validate_node_path(bad)
raise AssertionError(
"Invalid path {} should have failed".format(bad))
except core.MeasurementError:
pass
for good in utilities.good_node_paths:
try:
core.validate_node_path(good)
except core.MeasurementError:
raise AssertionError(
"Valid path {} should not have failed.".format(good))