ytree.arbor.tree_node.TreeNode

class ytree.arbor.tree_node.TreeNode(uid, arbor=None, root=False)

Class for objects stored in Arbors.

Each TreeNode represents a halo in a tree. A TreeNode knows its halo ID, the level in the tree, and its global ID in the Arbor that holds it. It also has a list of its ancestors. Fields can be queried for it, its progenitor list, and the tree beneath.

__init__(uid, arbor=None, root=False)

Initialize a TreeNode with at least its halo catalog ID and its level in the tree.

Methods

__init__(uid[, arbor, root])	Initialize a TreeNode with at least its halo catalog ID and its level in the tree.
add_ancestor(ancestor)	Add another TreeNode to the list of ancestors.
clear_fields()	If a root node, remove tree-related data structures.
pwalk()	An iterator over all TreeNodes in the progenitor list, starting with this TreeNode.
query(key)	Return field values for this TreeNode, progenitor list, or tree.
save_tree([filename, fields])	Save the tree to a file.
twalk()	An iterator over all TreeNodes in the tree beneath, starting with this TreeNode.

Attributes

ancestors
descids
is_root
nodes
tree_size
uids