import tensorflow as tf

                dec, num_units=embed_size // 2, scope="decoder-highwaynet-{}".format(i)
            )
        with tf.variable_scope("decoder-gru", reuse=False):
            cell = tf.contrib.rnn.GRUCell(embed_size // 2)
            cell_bw = tf.contrib.rnn.GRUCell(embed_size // 2)
            outputs, _ = tf.nn.bidirectional_dynamic_rnn(cell, cell_bw, dec, dtype=tf.float32)
