import maya.cmds as mc

class NodeFn( object ):
	def __init__(self, node):
		if not self.exists:
			mc.error('{0} - does not exist'.format(node))

	@property
	def exists(self):
		return mc.objExists(node)

	@property
	def objType(self):
		if not self.exists:
			return None

		return mc.nodeType(node)

####################

class AtrributeFn( NodeFn, object ):
	def __init__(self, node):
		super().__init__(node)

	@property
	def parent(self):
		return node.split('.')[0]

	@property
	def attr(self):
		return node.split('.')[1]

	@property
	def defaultValue(self):
		return mc.attributeQuery(self.attr, n=self.parent, ld=1)

	@defaultValue.setter
	def defaultValue(self, value):
		mc.addAttr(self, e=1, dv=value)



node = 'locator1.tx'
x = AtrributeFn(node)

print(x.defaultValue)