code: def test_custom_estimator_std_init(self):
      estimator = SEMEstimator(self.custom_lisrel)
      summary = estimator.fit(
          self.custom_data,
          method="ml",
          init_values="std",
          max_iter=10**6,
          opt="adam",
      )
  
file_path: pgmpy/pgmpy/tests/test_estimators/test_SEMEstimator.py
imports: import unittest
  import numpy
  import pandas
  import torch
  from pgmpy import config
  from pgmpy.estimators import IVEstimator, SEMEstimator
  from pgmpy.models import SEM, SEMGraph
label_desc: Use image node_id 7 for calling the TestSEMEstimator obj's underlying member method code with example usage: obj.test_custom_estimator_std_init() without return types