tf.sparse_segment_sum_with_num_segments( c, tf.constant([0,1]), tf.constant([0,0]), num_segments=3)# => [[0 0 0 0]# [0 0 0 0]# [0 0 0 0]]tf.sparse_segment_sum_with_num_segments(c, tf.constant([0,1]), tf.constant([0,2], num_segments=4))# => [[ 1 2 3 ...