Maya Convert Instance to Object

import maya.cmds as mc
import maya.OpenMaya as om

def getInstances():
    instances = []
    iterDag = om.MItDag(om.MItDag.kBreadthFirst)
    while not iterDag.isDone():
        instanced = om.MItDag.isInstanced(iterDag)
        if instanced:
            instances.append(iterDag.fullPathName())
        iterDag.next()
    return instances

def uninstance():
    instances = getInstances()
    while len(instances):
        parent = mc.listRelatives(instances[0], parent=True)[0]
        mc.duplicate(parent, renameChildren=True)
        mc.delete(parent)
        instances = getInstances()

uninstance()