tree.py

class Node(object):
	def __init__(self, val):
		self.value = val # Value of node
		self.children = [] # Can have multiple children

	def add_child(self, node):
		self.children.append(node)
		return node
	
	
# 	Usage
tree = Node("root")
f_child = tree.add_child(Node("first_child"))
s_child = tree.add_child(Node("second_child"))
t_child = tree.add_child(Node("third_child"))

ff_child = f_child.add_child(Node("first_first_child"))