old_contents: #!/usr/bin/env python
  """
  Simple mesh generators.
  """
  from argparse import ArgumentParser
  
  from . import blockgen, cylindergen, gen_iga_patch
  
  def main():
      parser = ArgumentParser(description=__doc__)
      parser.add_argument('--version', action='version', version='%(prog)s')
      subparsers = parser.add_subparsers(title='subcommands',
                                         description='valid subcommands',
                                         help='additional help',
                                         dest='mesh_kind',
                                         required=True)
  
      parser0 = subparsers.add_parser('block', help='generate a block mesh')
      parser0.set_defaults(fun=blockgen.gen_block)
      blockgen.add_args(parser0)
  
      parser1 = subparsers.add_parser('cylinder', help='generate a cylinder mesh')
      parser1.set_defaults(fun=cylindergen.gen_cylinder)
      cylindergen.add_args(parser1)
  
      parser2 = subparsers.add_parser('iga-patch', help='generate an IGA patch')
      parser2.set_defaults(fun=gen_iga_patch.gen_iga_patch)
      gen_iga_patch.add_args(parser2)
  
      options = parser.parse_args()
  
      options.fun(options)
  
  if __name__ == '__main__':
      main()
  
new_contents: #!/usr/bin/env python
  """
  Simple mesh generators and statistics.
  """
  from argparse import ArgumentParser
  
  from . import blockgen, cylindergen, gen_iga_patch, show_mesh_info
  
  def main():
      parser = ArgumentParser(description=__doc__)
      parser.add_argument('--version', action='version', version='%(prog)s')
      subparsers = parser.add_subparsers(title='subcommands',
                                         description='valid subcommands',
                                         help='additional help',
                                         dest='mesh_kind',
                                         required=True)
  
      parser0 = subparsers.add_parser('block', help='generate a block mesh')
      parser0.set_defaults(fun=blockgen.gen_block)
      blockgen.add_args(parser0)
  
      parser1 = subparsers.add_parser('cylinder', help='generate a cylinder mesh')
      parser1.set_defaults(fun=cylindergen.gen_cylinder)
      cylindergen.add_args(parser1)
  
      parser2 = subparsers.add_parser('iga-patch', help='generate an IGA patch')
      parser2.set_defaults(fun=gen_iga_patch.gen_iga_patch)
      gen_iga_patch.add_args(parser2)
  
      parser3 = subparsers.add_parser('info', help='show various mesh statistics')
      parser3.set_defaults(fun=show_mesh_info.show_mesh_info)
      show_mesh_info.add_args(parser3)
  
      options = parser.parse_args()
  
      options.fun(options)
  
  if __name__ == '__main__':
      main()
  
subject: add show_mesh_info.py as subcommand in main()