#!/usr/bin/env python

output = '<int %r id=%#0x value=%d>'
w = x = y = z = 1

def f1():
    x = y = z = 2

    def f2():
        y = z = 3

        def f3():
            z = 4
            print output % ('w', id(w), w)
            print output % ('x', id(x), x)
            print output % ('y', id(y), y)
            print output % ('z', id(z), z)

        clo = f3.func_closure
        if clo:
            print "f3 closure vars:", [str(c) for c in clo]
        else:
            print "no f3 closure vars"
        f3()

    clo = f2.func_closure
    if clo:
        print "f2 closure vars:", [str(c) for c in clo]
    else:
        print "no f2 closure vars"
    f2()

clo = f1.func_closure
if clo:
    print "f1 closure vars:", [str(c) for c in clo]
else:
    print "no f1 closure vars"
f1()