reader = tf.train.NewCheckpointReader(ckpt_file)
with tf.Session() as sess:
for key in reader.get_variable_to_shape_map():
tf.Variable(reader.get_tensor(key), name=key)
#tf.global_variables_initializer()
with tf.gfile.FastGFile(pb_file, "wb") as f:
f.write(sess.graph_def.SerializeToString())