linkAmy

I use the CopyNetWapper to wrap a decoder, this is my code: ``` train_decoder = tf.contrib.seq2seq.AttentionWrapper(decoder, attention_mechanism, attention_layer_size=self.config.PHVM_decoder_dim) train_encoder_state = train_decoder.zero_state(self.batch_size, dtype=tf.float32).clone( cell_state=sent_dec_state) copynet_decoder = CopyNetWrapper(train_decoder, sent_input, sent_lens, sent_lens, self.tgt_vocab_size)...