docstr: Update the screen with animated artists.
docstr_tok: ["Update","the","screen","with","animated","artists","."]
code: def update(self):
      """Update the screen with animated artists."""
      cv = self.canvas
      fig = cv.figure
      # paranoia in case we missed the draw event,
      if self._bg is None:
          self.on_draw(None)
      else:
          # restore the background
          cv.restore_region(self._bg)
          # draw all of the animated artists
          self._draw_animated()
          # update the GUI state
          cv.blit(fig.bbox)
      # let the GUI event loop process anything it has to do
      cv.flush_events()
  
file_path: matplotlib/galleries/users_explain/animations/blitting.py
imports: import matplotlib.pyplot
  import numpy
label_desc: Use image node_id 5 for calling the BlitManager obj's underlying member method code with example usage: obj.update() without return types