code: def size(self):
      return self._shape
  
file_path: vispy/examples/demo/scene/oscilloscope.py
imports: from __future__ import division
  import threading
  import atexit
  import numpy
  from vispy import app, scene, gloo, visuals
  from vispy.util.filter import gaussian_filter
label_desc: Use image node_id 2 for calling the ScrollingImage obj's underlying member method code with example usage: obj.size() and returns: self