fix(//py): Don't crash harshly on import when CUDA is not available

Signed-off-by: Naren Dasan <[email protected]>
Signed-off-by: Naren Dasan <[email protected]>

Author: narendasan

Diff for: py/trtorch/Device.py

@@ -107,7 +107,11 @@ def _from_torch_device(cls, torch_dev: torch.device):
 
     @classmethod
     def _current_device(cls):
-        dev = trtorch._C._get_current_device()
+        try:
+            dev = trtorch._C._get_current_device()
+        except RuntimeError:
+            trtorch.logging.log(trtorch.logging.Level.Error, "Cannot get current device")
+            return None
         return cls(gpu_id=dev.gpu_id)
 
     @staticmethod