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TypeError：Seq2Seqで_thread.lockオブジェクトをpickleできません

Tensorflowモデルでバケットの使用に問題があります。 buckets = [(100, 100)]で実行すると、問題なく動作します。 buckets = [(100, 100), (200, 200)]で実行すると、まったく機能しません（一番下のスタックトレース）。

興味深いことに、TensorflowのSeq2Seqチュートリアルを実行すると、ほぼ同じスタックトレースで同じ種類の問題が発生します。テスト目的の場合、リポジトリへのリンクは here です。

問題が何であるかはわかりませんが、複数のバケットがあると常にそれがトリガーされるようです

このコードはスタンドアロンとしては機能しませんが、これはクラッシュする関数です-bucketsを[(100, 100)]から[(100, 100), (200, 200)]に変更するとクラッシュがトリガーされることに注意してください。

class MySeq2Seq(object):
    def __init__(self, source_vocab_size, target_vocab_size, buckets, size, num_layers, batch_size, learning_rate):
        self.source_vocab_size = source_vocab_size
        self.target_vocab_size = target_vocab_size
        self.buckets = buckets
        self.batch_size = batch_size

        cell = single_cell = tf.nn.rnn_cell.GRUCell(size)
        if num_layers > 1:
            cell = tf.nn.rnn_cell.MultiRNNCell([single_cell] * num_layers)

        # The seq2seq function: we use embedding for the input and attention
        def seq2seq_f(encoder_inputs, decoder_inputs, do_decode):
            return tf.contrib.legacy_seq2seq.embedding_attention_seq2seq(
                encoder_inputs, decoder_inputs, cell,
                num_encoder_symbols=source_vocab_size,
                num_decoder_symbols=target_vocab_size,
                embedding_size=size,
                feed_previous=do_decode)

        # Feeds for inputs
        self.encoder_inputs = []
        self.decoder_inputs = []
        self.target_weights = []
        for i in range(buckets[-1][0]):
            self.encoder_inputs.append(tf.placeholder(tf.int32, shape=[None], name="encoder{0}".format(i)))
        for i in range(buckets[-1][1] + 1):
            self.decoder_inputs.append(tf.placeholder(tf.int32, shape=[None], name="decoder{0}".format(i)))
            self.target_weights.append(tf.placeholder(tf.float32, shape=[None], name="weight{0}".format(i)))

        # Our targets are decoder inputs shifted by one
        targets = [self.decoder_inputs[i + 1] for i in range(len(self.decoder_inputs) - 1)]
        self.outputs, self.losses = tf.contrib.legacy_seq2seq.model_with_buckets(
            self.encoder_inputs, self.decoder_inputs, targets,
            self.target_weights, [(100, 100)],
            lambda x, y: seq2seq_f(x, y, False))

        # Gradients update operation for training the model
        params = tf.trainable_variables()
        self.updates = []
        for b in range(len(buckets)):
            self.updates.append(tf.train.AdamOptimizer(learning_rate).minimize(self.losses[b]))

        self.saver = tf.train.Saver(tf.global_variables())

スタックトレース：

    Traceback (most recent call last):
  File "D:/Stuff/IdeaProjects/myproject/src/main.py", line 38, in <module>
    model = predict.make_model(input_vocab_size, output_vocab_size, buckets, cell_size, model_layers, batch_size, learning_rate)
  File "D:\Stuff\IdeaProjects\myproject\src\predictor.py", line 88, in make_model
    size=cell_size, num_layers=model_layers, batch_size=batch_size, learning_rate=learning_rate)
  File "D:\Stuff\IdeaProjects\myproject\src\predictor.py", line 45, in __init__
    lambda x, y: seq2seq_f(x, y, False))
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\contrib\legacy_seq2seq\python\ops\seq2seq.py", line 1206, in model_with_buckets
    decoder_inputs[:bucket[1]])
  File "D:\Stuff\IdeaProjects\myproject\src\predictor.py", line 45, in <lambda>
    lambda x, y: seq2seq_f(x, y, False))
  File "D:\Stuff\IdeaProjects\myproject\src\predictor.py", line 28, in seq2seq_f
    feed_previous=do_decode)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\contrib\legacy_seq2seq\python\ops\seq2seq.py", line 848, in embedding_attention_seq2seq
    encoder_cell = copy.deepcopy(cell)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 161, in deepcopy
    y = copier(memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\tensorflow\python\layers\base.py", line 476, in __deepcopy__
    setattr(result, k, copy.deepcopy(v, memo))
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 150, in deepcopy
    y = copier(x, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 215, in _deepcopy_list
    append(deepcopy(a, memo))
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 180, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 280, in _reconstruct
    state = deepcopy(state, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 150, in deepcopy
    y = copier(x, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 240, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 180, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 280, in _reconstruct
    state = deepcopy(state, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 150, in deepcopy
    y = copier(x, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 240, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 180, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 280, in _reconstruct
    state = deepcopy(state, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 150, in deepcopy
    y = copier(x, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 240, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 180, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 280, in _reconstruct
    state = deepcopy(state, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 150, in deepcopy
    y = copier(x, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 240, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\copy.py", line 169, in deepcopy
    rv = reductor(4)
TypeError: can't pickle _thread.lock objects
python-3.xtensorflownlplstmsequence-to-sequence
10
Evan Weissburg

問題は、seq2seq.pyの最新の変更にあります。これをスクリプトに追加すると、セルのディープコピーが回避されます。

setattr(tf.contrib.rnn.GRUCell, '__deepcopy__', lambda self, _: self)
setattr(tf.contrib.rnn.BasicLSTMCell, '__deepcopy__', lambda self, _: self)
setattr(tf.contrib.rnn.MultiRNNCell, '__deepcopy__', lambda self, _: self)
5
Maxim

この解決策は私にはうまくいきません。新しいソリューションはありますか？

これらの2つのソリューションは私のために働く：

/ yourpath/tensorflow/contrib/legacy_seq2seq/python/ops /の下のseq2seq.pyを変更します

#encoder_cell = copy.deepcopy(cell)
encoder_cell = core_rnn_cell.EmbeddingWrapper(
    cell, #encoder_cell,

または

for nextBatch in tqdm(batches, desc="Training"):
    _, step_loss = model.step(...)

ステップで1つのバケットに餌をやる

0
Sheng Wan