code: def __init__(self, *args, **kwargs):
      super().__init__(*args, **kwargs)
      self.AddObserver(
          "MiddleButtonPressEvent", self.middle_button_press
      )
      self.AddObserver(
          "MiddleButtonReleaseEvent", self.middle_button_release
      )
      self.AddObserver("LeftButtonPressEvent", self.left_button_press)
      self.AddObserver(
          "LeftButtonReleaseEvent", self.left_button_release
      )
      self.AddObserver("RightButtonPressEvent", self.right_button_press)
      self.AddObserver(
          "RightButtonReleaseEvent", self.right_button_release
      )
  
imports: import vtk
  import json
  import numpy
  import argparse
  import sys
  import subprocess
  from plyfile import PlyData
label_desc: Use image node_id 1 to create a new MyEvent object from inherited base classes: vtk with example: obj = MyEvent()