code: def test_basic_is_cuda(self):
      class SimpleOp(nn.Module):
          def forward(self, x):
              return torch.tensor(
                  [x.is_cuda],
                  dtype=torch.bool,
                  device=torch.device("cpu"),
              )
  
      self.checkExportImport(
          SimpleOp(), (torch.tensor((), dtype=torch.int32),)
      )
  
imports: import unittest
  import torch
  import nni.nas.nn.pytorch.layers
  from .convert_mixin import ConvertMixin, ConvertWithShapeMixin
label_desc: Use image node_id 4 for calling the TestConvert obj's underlying member method code with example usage: obj.test_basic_is_cuda() and returns: torch