code: def test_delta_1(self):
      self.generate(
          "test_delta_1",
          "test_lowess_delta.csv",
          out="out_1",
          kwargs={"frac": 0.1, "delta": 1 + 1e-10},
          decimal=10,
      )
  
imports: import os
  import numpy
  from numpy.testing import assert_, assert_allclose, assert_almost_equal, assert_equal, assert_raises
  import pytest
  from statsmodels.nonparametric.smoothers_lowess import lowess
  import pandas
label_desc: Use image node_id 12 for calling the TestLowess obj's underlying member method code with example usage: obj.test_delta_1() without return types