code: def is_tensor(tensor):
      """Checks if the input tensor is a Torch tensor or a CUDALongTensor"""
      return torch.is_tensor(tensor) or isinstance(
          tensor, CUDALongTensor
      )
  
imports: import torch
  from crypten.cuda import CUDALongTensor
label_desc: Use image node_id 2 for calling a global function with example usage: is_tensor(tensor) and returns: unknown