Decorators as syntatic sugar to closures in Python

decorators.py

class Node :
    def __init__(self,val,children) :
        self.val = val
        self.children = children

def makeRunner(f) :
    def run(node) :
        f(node)
        for x in node.children :
            run(x)
    return run

tree=Node(1,[Node(2,[]),Node(3,[Node(4,[]),Node(5,[])])])

#Using decorators
@makeRunner
def printTree(node) : print "%s," % node.val

#Simple closures
#def pp(node) : print "%s," % node.val
#printTree = makeRunner(pp)

printTree(tree)