Randomly initialize embeddings for tag

        Parameters
        ----------
        tag_dims : int
            tag vector size

        Returns
        -------
        numpy.ndarray
            random embeddings

def get_tag_embs(self, tag_dims):
        """Randomly initialize embeddings for tag

        Parameters
        ----------
        tag_dims : int
            tag vector size

        Returns
        -------
        numpy.ndarray
            random embeddings
        """
        return np.random.randn(self.tag_size, tag_dims).astype(np.float32)