old_contents: from bokeh.plotting import *
  
  output_file("image_url.html")
  
  p = figure()
  
  url = ["http://bokeh.pydata.org/_static/bokeh-transparent.png"]*10
  x = list(range(0, 100, 10))
  y = list(range(0, 100, 10))
  p.image_url(x=x, y=y, url=url)
  
  show(p)
  
new_contents: from bokeh.plotting import *
  
  output_file("image_url.html")
  
  p = figure()
  
  url = ["http://bokeh.pydata.org/en/latest/_static/bokeh-transparent.png"]*10
  x = list(range(0, 100, 10))
  y = list(range(0, 100, 10))
  p.image_url(x=x, y=y, url=url)
  
  show(p)
  
subject: update image url