code: def test_influence(self):
      # currently only smoke test
      res1 = self.res1
      from statsmodels.stats.outliers_influence import MLEInfluence
  
      influ0 = MLEInfluence(res1)
      influ = res1.get_influence()
      attrs = [
          "cooks_distance",
          "d_fittedvalues",
          "d_fittedvalues_scaled",
          "d_params",
          "dfbetas",
          "hat_matrix_diag",
          "resid_studentized",
      ]
      for attr in attrs:
          getattr(influ, attr)
  
      frame = influ.summary_frame()
      frame0 = influ0.summary_frame()
      assert_allclose(frame, frame0, rtol=1e-13, atol=1e-13)
  
imports: import io
  import os
  import pytest
  import numpy
  from numpy.testing import assert_allclose, assert_equal
  import pandas
  import patsy
  from statsmodels.api import families
  from statsmodels.tools.sm_exceptions import ValueWarning
  from statsmodels.othermod.betareg import BetaModel
  from .results import results_betareg
label_desc: Use image node_id 3 for calling the TestBetaIncome obj's underlying member method code with example usage: obj.test_influence() without return types