code: def test_curves_equal(self):
      self.assertEqual(self.curve1, self.curve1)
  
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 2 for calling the CurveComparisonTest obj's underlying member method code with example usage: obj.test_curves_equal() without return types