code: def test_kde_plot(self):
      psdf = ps.DataFrame({"a": [1, 2, 3, 4, 5]})
      pdf = pd.DataFrame(
          {
              "Density": [0.05709372, 0.07670272, 0.05709372],
              "names": ["a", "a", "a"],
              "index": [-1.0, 3.0, 7.0],
          }
      )
  
      actual = psdf.a.plot.kde(bw_method=5, ind=3)
  
      expected = express.line(pdf, x="index", y="Density")
      expected["layout"]["xaxis"]["title"] = None
  
      self.assertEqual(
          pprint.pformat(actual.to_dict()),
          pprint.pformat(expected.to_dict()),
      )
  
imports: import unittest
  import pprint
  import pandas
  import numpy
  from pyspark import pandas
  from pyspark.pandas.config import set_option, reset_option
  from pyspark.pandas.utils import name_like_string
  from pyspark.testing.pandasutils import have_plotly, plotly_requirement_message, PandasOnSparkTestCase, TestUtils
label_desc: Use image node_id 15 for calling the SeriesPlotPlotlyTestsMixin obj's underlying member method code with example usage: obj.test_kde_plot() without return types