Traverse binary search tree

How to traverse a binary search tree in python ? Assuming we have a TreeNode

class TreeNode:
	def __init__(self, value):
		self.val = value
		self.left = None
		self.right = None

Pre-order traverse

Refer from Technique - Tree Traversal#Preorder traversal

def traverse(node: TreeNode):
	if node is None:
		return
	print(node.value)
	traverse(node.left)
	traverse(node.right)

In-order traverse

Refer from Technique - Tree Traversal#Inorder Traversal

def traverse(node: TreeNode):
	if node is None:
		return
	traverse(node.left)
	print(node.val)
	traverse(node.right)

Post-order traverse

Refer from Technique - Tree Traversal#Postorder traversal

def traverse(node: TreeNode):
	if node is None:
		return
	traverse(node.left)
	traverse(node.right)
	print(node.val)