def _init_group():
        """Initialize a group, which is composed of the keypoints, keypoint
        scores and the tag of each keypoint."""
        _group = Group(
            kpts=np.zeros((K, D), dtype=np.float32),
            scores=np.zeros(K, dtype=np.float32),
            tag_list=[])
        return _group
Initialize a group, which is composed of the keypoints, keypoint
        scores and the tag of each keypoint.
mmpose/mmpose/codecs/associative_embedding.py