docstr: move the tensor keys to runtime device, such as gpu:0
          
docstr_tok: ["move","the","tensor","keys","to","runtime","device",",","such","as","gpu:0"]
code: def to(self, device: str = "cuda:0"):
      r"""move the tensor keys to runtime device, such as gpu:0"""
      for key in self.tensorable_keys:
          value = getattr(self, key)
          if value is not None:
              setattr(self, key, value.to(device))
      return self
  
imports: import copy
  import json
  import pickle
  from typing import *
  import paddle
label_desc: Use image node_id 8 for calling the InputFeatures obj's underlying member method code with example usage: obj.to(device) and returns: self