Tensorflow：用其他操作替换操作

Question

我的图表看起来像这样：

 I  W
 \ /
  E
  |
X1...Xn

我想替换操作E以获得这样的新图：

 I  Q
 \ /
  L
  |
X1...Xn

但是我迷失了graph_editor界面 我尝试过：ge.graph_replace(E, {E: L})，但我得到：ValueError: Targets and replacements are not connected!。

编辑：代码看起来像那样

with tf.Graph().as_default():
    saver = tf.train.import_meta_graph(FLAGS.load_model + ".meta")
    graph = tf.get_default_graph()
    codebooks, labels = read_qnpy(FLAGS.output_qnpy)
    with tf.variable_scope('Output_qnpy'):
        embeddings = qembs_graph(codebooks, labels) 
        all_ids = graph.get_tensor_by_name('Model/Output/nce_loss/concat:0')
        el = graph.get_tensor_by_name('Model/Output/nce_loss/embedding_lookup:0')
        word_lookup = tf.nn.embedding_lookup(embeddings, all_ids, name="word_lookup")
        ge.graph_replace(el, {el: word_lookup})