code: def test_influence(self):
      # currently only smoke test
      res1 = self.res1
      from statsmodels.stats.outliers_influence import MLEInfluence
  
      influ = MLEInfluence(res1)
      attrs = [
          "cooks_distance",
          "d_fittedvalues",
          "d_fittedvalues_scaled",
          "d_params",
          "dfbetas",
          "hat_matrix_diag",
          "resid_studentized",
      ]
      for attr in attrs:
          getattr(influ, attr)
  
      influ.summary_frame()
  
imports: import warnings
  import numpy
  from numpy.testing import assert_allclose, assert_equal
  import pytest
  from statsmodels.tools.tools import add_constant
  from statsmodels.base._prediction_inference import PredictionResultsMonotonic
  from statsmodels.discrete.discrete_model import BinaryModel, Logit, Probit, Poisson, NegativeBinomial, NegativeBinomialP, GeneralizedPoisson
  from statsmodels.discrete.count_model import ZeroInflatedPoisson, ZeroInflatedNegativeBinomialP, ZeroInflatedGeneralizedPoisson
  from statsmodels.sandbox.regression.tests.test_gmm_poisson import DATA
  from .results import results_predict
label_desc: Use image node_id 4 for calling the CheckExtras obj's underlying member method code with example usage: obj.test_influence() without return types