code: def __init__(self):
      app.Canvas.__init__(self, keys="interactive", size=(800, 800))
      self.line = visuals.LinePlotVisual(
          pos,
          color="w",
          edge_color="w",
          symbol="o",
          face_color=(0.2, 0.2, 1),
      )
      self.show()
  
file_path: vispy/examples/basics/visuals/line_plot.py
imports: import numpy
  import sys
  from vispy import gloo, app, visuals
label_desc: Use image node_id 1 to create a new Canvas object from inherited base classes: app with example: obj = Canvas()