code: def __repr__(self):
      return "Employee(%s, %d, %d)" % (self.emp, self.left, self.right)
  
file_path: sqlalchemy/examples/nested_sets/nested_sets.py
imports: from sqlalchemy import case
  from sqlalchemy import Column
  from sqlalchemy import create_engine
  from sqlalchemy import event
  from sqlalchemy import func
  from sqlalchemy import Integer
  from sqlalchemy import select
  from sqlalchemy import String
  from sqlalchemy.ext.declarative import declarative_base
  from sqlalchemy.orm import aliased
  from sqlalchemy.orm import Session
label_desc: Use image node_id 1 for calling the Employee obj's underlying member method code with example usage: obj.__repr__() and returns: unknown