code: def test_scatter_unequal_data_values(self):
      try:
          self.assertEqual(self.scatter1, self.scatter3)
      except AssertionError as e:
          if not str(e).startswith(
              "Scatter not almost equal to 6 decimals"
          ):
              raise self.failureException(
                  "Scatter data mismatch error not raised."
              )
  
imports: import numpy
  from holoviews import Bars, Curve, Dimension, Histogram, Points, Scatter, VectorField
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 6 for calling the ScatterComparisonTest obj's underlying member method code with example usage: obj.test_scatter_unequal_data_values() without return types