def METHOD_NAME(self, argp):
    t0 = time.time()
    prefix = self.n.METHOD_NAME({ 'name': 'test-schema' }, { 'from-prefix': [argp], 'prefix_length': 32 })
    t1 = time.time()
    d1 = t1-t0
    print "First free prefix:", prefix, "found in", d1, "seconds"