При попытке использовать torch rnn.py объект AttributeError: builtin_function_or_method не имеет атрибута size

Question

Я получаю эту ошибку, когда запускаю модель, которую использую. Это код, который, кажется, вызывает проблему?

  def forward(self, b, xc, xw, lens):
        self.hidden = self.init_state(b)
        x = self.embed(xc, xw)
        x = nn.utils.rnn.pack_padded_sequence(x, lens, batch_first = True)
        h, _ = self.rnn(x, self.hidden)
        h, _ = nn.utils.rnn.pad_packed_sequence(h, batch_first = True)
        return h

Вот трассировка

Traceback (most recent call last):
  File "train.py", line 59, in <module>
    train()
  File "train.py", line 44, in train
    loss = model(xc, xw, y0) # forward pass and compute loss
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/torch/nn/modules/module.py", line 550, in __call__
    result = self.forward(*input, **kwargs)
  File "/Users/sidu/Downloads/rnn-encoder-decoder-pytorch/model.py", line 18, in forward
    self.dec.hs = self.enc(b, xc, xw, lens)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/torch/nn/modules/module.py", line 550, in __call__
    result = self.forward(*input, **kwargs)
  File "/Users/sidu/Downloads/rnn-encoder-decoder-pytorch/model.py", line 64, in forward
    h, _ = self.rnn(x, self.hidden)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/torch/nn/modules/module.py", line 550, in __call__
    result = self.forward(*input, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/torch/nn/modules/rnn.py", line 567, in forward
    self.check_forward_args(input, hx, batch_sizes)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/torch/nn/modules/rnn.py", line 522, in check_forward_args
    self.check_hidden_size(hidden[0], expected_hidden_size,
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/torch/nn/modules/rnn.py", line 186, in check_hidden_size
    if hx.size() != expected_hidden_size:
AttributeError: 'builtin_function_or_method' object has no attribute 'size'

Я не могу понять, откуда эта ошибка, вероятно из-за моей неопытности в этом деле. Кто-нибудь может увидеть проблему? Дайте мне знать, если мне нужно что-то еще