text: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import numpy as np
  from six.moves import xrange  # pylint: disable=redefined-builtin
  import tensorflow as tf
  
  import time
  from utils import *
  
  SESS_CONF = tf.ConfigProto(allow_soft_placement=True)
  SESS_CONF.gpu_options.per_process_gpu_memory_fraction = 0.9
  