def false_fn():
    'Logics to execute when the instance_inds is an empty set.'
    return (tf.zeros([1, 0, total_num_keypoints, 2], dtype=tf.float32), tf.zeros([1, 0, total_num_keypoints], dtype=tf.float32))
Logics to execute when the instance_inds is an empty set.
def false_fn():
    
    return (tf.zeros([1, 0, total_num_keypoints, 2], dtype=tf.float32), tf.zeros([1, 0, total_num_keypoints], dtype=tf.float32))