#!/usr/bin/env python3

 from keras.utils import np_utils
 import numpy

 X = numpy.array([2,1,2,0,1,0])
 print("org=", X)

 onehot=np_utils.to_categorical(X)
 print("onehot=", onehot)

 a=onehot.argmax(1)
 print("reverse=", a)