1、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).

解决：
将

theta_init_new = torch.tensor(theta, dtype=torch.float32, requires_grad=True)

改为

theta_init_new = torch.as_tensor(theta, dtype=torch.float32, requires_grad=True)

2、‘bool’ object is not iterable

解决：