code: def test_path_continuously_varying_color_op(self):
      xs = [1, 2, 3, 4]
      ys = xs[::-1]
      color = [998, 999, 998, 994]
      date = np.datetime64(dt.datetime(2018, 8, 1))
      data = {"x": xs, "y": ys, "color": color, "date": date}
      levels = [0, 38, 73, 95, 110, 130, 156, 999]
      colors = [
          "#5ebaff",
          "#00faf4",
          "#ffffcc",
          "#ffe775",
          "#ffc140",
          "#ff8f20",
          "#ff6060",
      ]
      path = Path([data], vdims=["color", "date"]).opts(
          color="color",
          color_levels=levels,
          cmap=colors,
          tools=["hover"],
      )
      plot = bokeh_renderer.get_plot(path)
      source = plot.handles["source"]
      cmapper = plot.handles["color_color_mapper"]
  
      self.assertEqual(
          source.data["xs"],
          [np.array([1, 2]), np.array([2, 3]), np.array([3, 4])],
      )
      self.assertEqual(
          source.data["ys"],
          [np.array([4, 3]), np.array([3, 2]), np.array([2, 1])],
      )
      self.assertEqual(source.data["color"], np.array([998, 999, 998]))
      self.assertEqual(source.data["date"], np.array([date] * 3))
      self.assertEqual(cmapper.low, 994)
      self.assertEqual(cmapper.high, 999)
      self.assertEqual(cmapper.palette, colors[-1:])
  
imports: import datetime
  import numpy
  import pandas
  from bokeh.models import CategoricalColorMapper, LinearColorMapper
  from holoviews.core import HoloMap, NdOverlay
  from holoviews.core.options import Cycle
  from holoviews.element import Contours, Path, Polygons
  from holoviews.plotting.bokeh.util import property_to_dict
  from holoviews.streams import PolyDraw
  from holoviews.util.transform import dim
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 8 for calling the TestPathPlot obj's underlying member method code with example usage: obj.test_path_continuously_varying_color_op() without return types