in ncf.py [0:0]
def _get_item_embedding_layers(inputs, emb_dim):
""" create item embeddings """
item_gmf_emb = tf.keras.layers.Dense(emb_dim, activation='relu')(inputs)
item_mlp_emb = tf.keras.layers.Dense(emb_dim, activation='relu')(inputs)
return item_gmf_emb, item_mlp_emb