in common/skeleton.py [0:0]
def _compute_metadata(self):
self._has_children = np.zeros(len(self._parents)).astype(bool)
for i, parent in enumerate(self._parents):
if parent != -1:
self._has_children[parent] = True
self._children = []
for i, parent in enumerate(self._parents):
self._children.append([])
for i, parent in enumerate(self._parents):
if parent != -1:
self._children[parent].append(i)