code: def keyPressEvent(self, event):
      if event.key() == QtCore.Qt.Key_Escape:
          self.close()
      elif event.key() == QtCore.Qt.Key_F11:
          self.showNormal() if self.isFullScreen() else self.showFullScreen()
  
file_path: vispy/examples/tutorial/app/shared_context.py
imports: from PyQt5 import QtWidgets, QtCore
  from functools import partial
  from vispy.app import Timer
  from vispy.scene.visuals import Text
  from vispy.scene.widgets import ViewBox
  from vispy.scene import SceneCanvas
label_desc: Use image node_id 4 for calling the Window obj's underlying member method code with example usage: obj.keyPressEvent(event) without return types