code: def __init__(self, identified_estimand, estimator_name):
      self.treatment_variable = identified_estimand.treatment_variable
      self.outcome_variable = identified_estimand.outcome_variable
      self.backdoor_variables = (
          identified_estimand.get_backdoor_variables()
      )
      self.instrumental_variables = (
          identified_estimand.instrumental_variables
      )
      self.estimand_type = identified_estimand.estimand_type
      self.estimand_expression = None
      self.assumptions = None
      self.estimator_name = estimator_name
  
imports: import copy
  import logging
  from collections import namedtuple
  from typing import Dict, List, Optional, Union
  import numpy
  import pandas
  import sympy
  from sklearn.utils import resample
  import dowhy.interpreters
  from dowhy.causal_identifier.identified_estimand import IdentifiedEstimand
  from dowhy.utils.api import parse_state
label_desc: Use image node_id 1 to create a new RealizedEstimand object from inherited base classes: object with example: obj = RealizedEstimand(identified_estimand, estimator_name)