code: def __repr__(self):
      if id(self) in _repr_stack:
          return object.__repr__(self)
      _repr_stack.add(id(self))
      try:
          return "%s(%s)" % (
              (self.__class__.__name__),
              ", ".join(
                  [
                      "%s=%r" % (key, getattr(self, key))
                      for key in sorted(self.__dict__.keys())
                      if not key.startswith("_")
                  ]
              ),
          )
      finally:
          _repr_stack.remove(id(self))
  
file_path: sqlalchemy/lib/sqlalchemy/testing/entities.py
imports: from __future__ import annotations
  import sqlalchemy
  from ..None import exc
  from ..orm.writeonly import WriteOnlyCollection
label_desc: Use image node_id 2 for calling the BasicEntity obj's underlying member method code with example usage: obj.__repr__() and returns: object, unknown