text: from __future__ import absolute_import
  import svgling.core
  import sys
  
  def main(*argv):
      if len(argv) != 2:
          print >>sys.stderr, u"Please supply a python expression describing a tree."
          return
      t = eval(argv[1])
      layout = svgling.core.TreeLayout(t, options=svgling.core.TreeOptions())
      print layout._repr_svg_()
  
  main(*sys.argv)