skbio.core.tree.TreeNode.pre_and_postorder¶

TreeNode.pre_and_postorder(include_self=True)[source]¶

Performs iteration over tree, visiting node before and after

Parameters:	include_self : bool include the initial node if True
Returns:	GeneratorType Yields successive TreeNode objects

See also

traverse, postorder, preorder, levelorder, tips, non_tips

Examples

>>> from skbio.core.tree import TreeNode
>>> tree = TreeNode.from_newick("((a,b)c);")
>>> for node in tree.pre_and_postorder():
...     print node.name
None
c
a
b
c
None