code: def __getitem__(self, item):
      from ._ops import slice_f
  
      if isinstance(item, int):
          return slice_f(self, item)
      else:
          raise NotImplementedError(f"item {item} not supported")
  
imports: import functools
  import torch
  from fate.arch.trace import auto_trace
label_desc: Use image node_id 5 for calling the PHETensor obj's underlying member method code with example usage: obj.__getitem__(item) and returns: slice_f