code: def decode_f(tensor, coder):
      if hasattr(tensor, "__torch_function__"):
          return tensor.__torch_function__(
              decode_f, (type(tensor),), (tensor, coder), None
          )
      raise NotImplementedError(f"{type(tensor)}")
  
file_path: FATE/python/fate/arch/tensor/_custom_ops.py
imports: import torch
label_desc: Use image node_id 6 for calling a global function with example usage: decode_f(tensor, coder) and returns: tensor