code: def __repr__(self):
      return f"<{self.__class__.__name__} at {id(self):#x}>"
  
imports: from __future__ import annotations
  import weakref
  from weakref import ref
  from _weakrefset import _IterationGuard
  from collections.abc import MutableMapping, Mapping
  from torch import Tensor
  import collections.abc
label_desc: Use image node_id 7 for calling the WeakIdKeyDictionary obj's underlying member method code with example usage: obj.__repr__() and returns: str, self, str, id, str