Python3 || easy method uses
\t\ttraversal = list()\n        \n        if root:\n            for child in root.children:\n                traversal+=self.postorder(child)\n    \n           
\t\ttraversal = list()\n        \n        if root:\n            for child in root.children:\n                traversal+=self.postorder(child)\n    \n            traversal.append(root.val)\n                \n        return traversal
['Recursion', 'Python3']