pytorch常见问题

1 Gather function not implemented for CPU tensors

多卡训练时候，net的forward里面存在Tensor变成其它类型的操作，比如变成numpy，list

解决：改成Tensor操作

2 RuntimeError: element 0 of tensors does not require grad and does not have a grad_fn

https://blog.csdn.net/weixin_41990278/article/details/90311313

https://blog.csdn.net/wu_xin1/article/details/116502378