我在PyTorch中具有以下实现,可以使用LSTM学习:
https://gist.github.com/rahulbhadani/f1d64042cc5a80280755cac262aa48aa
但是,该代码遇到就地操作错误
我的错误输出是:
/home/ivory/anaconda3/lib/python3.7/site-packages/ipykernel_launcher.py:10: UserWarning: To copy construct from a tensor, it is recommended to use sourceTensor.clone().detach() or sourceTensor.clone().detach().requires_grad_(True), rather than torch.tensor(sourceTensor).
# Remove the CWD from sys.path while we load stuff.
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
<ipython-input-86-560ec78f2b64> in <module>
27 linear = torch.nn.Linear(hidden_nums, output_dim)
28
---> 29 global_loss_list = global_training(lstm2)
<ipython-input-84-152890a3028c> in global_training(optimizee)
3 adam_global_optimizer = torch.optim.Adam([{'params': optimizee.parameters()},
4 {'params':linear.parameters()}], lr = 0.0001)
----> 5 _, global_loss_1 = learn2(LSTM_Optimizee, training_steps, retain_graph_flag=True, reset_theta=True)
6
7 print(global_loss_1)
<ipython-input-83-0357a528b94d> in learn2(optimizee, unroll_train_steps, retain_graph_flag, reset_theta)
43 # requires_grad=True. These are accumulated into x.grad for every
44 # parameter x. In pseudo-code: x.grad += dloss/dx
---> 45 loss.backward(retain_graph = retain_graph_flag) #The default is False, when the optimized LSTM is set to True
46
47 print('x.grad: {}'.format(x.grad))
~/anaconda3/lib/python3.7/site-packages/torch/tensor.py in backward(self, gradient, retain_graph, create_graph)
116 products. Defaults to ``False``.
117 """
--> 118 torch.autograd.backward(self, gradient, retain_graph, create_graph)
119
120 def register_hook(self, hook):
~/anaconda3/lib/python3.7/site-packages/torch/autograd/__init__.py in backward(tensors, grad_tensors, retain_graph, create_graph, grad_variables)
91 Variable._execution_engine.run_backward(
92 tensors, grad_tensors, retain_graph, create_graph,
---> 93 allow_unreachable=True) # allow_unreachable flag
94
95
RuntimeError: one of the variables needed for gradient computation has been modified by an inplace operation: [torch.FloatTensor [1, 10]] is at version 1; expected version 0 instead. Hint: enable anomaly detection to find the operation that failed to compute its gradient, with torch.autograd.set_detect_anomaly(True).
我试图跟踪错误,但没有成功。在这方面的任何帮助将不胜感激。
谢谢。
最佳答案
我认为问题在于以下几行:
global_loss_list.append(global_loss.detach_())
PyTorch中就地操作的约定是在函数名称的末尾使用
_
(与detach_
相同)。我相信您不应该就地分离。换句话说,将detach_
更改为detach
关于python - 无法在pytorch代码中找到就地操作?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/57500582/