'Builds the input sequence embeddings.
Inputs:
self.input_seqs
Outputs:
self.seq_embeddings'

def build_seq_embeddings(self):

    with tf.variable_scope('seq_embedding'):
        with tf.device('/cpu:0'):
            embedding_map = tf.get_variable(name='map', shape=[self.config.vocab_size, self.config.embedding_size], initializer=self.initializer)
            seq_embeddings = tf.nn.embedding_lookup(embedding_map, self.input_seqs)
    self.seq_embeddings = seq_embeddings
