code: def to_tensor(self, device: str = "cuda"):
      for key in self.tensorable_keys:
          value = getattr(self, key)
          if value is not None:
              setattr(self, key, paddle.to_tensor(value))
      return self
  
imports: import copy
  import json
  import pickle
  from typing import *
  import paddle
label_desc: Use image node_id 7 for calling the InputFeatures obj's underlying member method code with example usage: obj.to_tensor(device) and returns: self