class SoundNode:
	
	def __init__(self, order, name):
		
		self.order = order
		self.name = name
		self.properties = dict() # {k: v}
		
	def __repr__(self):
		return f'{self.order}:{self.name}'

	def g(self, k):
		return self.properties.get(k)
		
	def s(self, k, v):
		self.properties[k] = v

class Sonnum:
	
	def __init__(self):
		
		self.nodes = dict() # {order: name}
		self.properties = dict() # {k: v}
		
	def add_node(self, name):
		
		order = len(self.nodes)
		self.nodes[name] = SoundNode(order, name)
		
		return self.nodes[name]

	def node_by_name(self, name):
		
		for order, node in self.nodes.items():
			
			if node.name == name:
				return node
				
	def node_by_order(self, order):
		
		return self.nodes.get(order)
		
	def g(self, k):
		return self.properties.get(k)
		
	def s(self, k, v):
		self.properties[k] = v