docs: def image(value, width='', height=''):
      """
      Accepts a URL and returns an HTML image tag ready to be displayed.
      
      Optionally, you can set the height and width with keyword arguments.
      """
      style = ""
      if width:
          style += "width:%s" % width
      if height:
          style += "height:%s" % height
      data_dict = dict(src=value, style=style)
      return '<img src="%(src)s" style="%(style)s">' % data_dict