Expected all tensors to be on the same device, but found at least two devices, cuda:0 and cpu!

这个错误表示在计算过程中，发现了至少两个不同的设备，cuda:0和cpu，但是期望所有的张量都在同一个设备上。这个错误一般出现在将模型从一个设备（比如GPU）移动到另一个设备（比如CPU）时。

解决这个问题的方法是确保所有的张量都在同一个设备上。你可以使用`torch.device`函数来指定你想要使用的设备，比如cuda或cpu，然后使用`.to(device)`方法将模型和张量都移动到指定的设备上。例如，你可以使用以下代码将模型和张量都移动到CUDA设备上：

device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
model = model.to(device)
tensor = tensor.to(device)

这样，你就可以确保所有的张量都在同一个设备上，避免了这个错误的出现。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [Expected all tensors to be on the same device, but found at least two devices, cuda:0 and cpu!](https://blog.csdn.net/m0_56654441/article/details/120895807)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [解决RuntimeError: Expected all tensors to be on the same device, but found at least two devices, cp](https://blog.csdn.net/muye_IT/article/details/124956145)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]