code: def entry_point():
      
      try:
          main("omego", items=[
              (InstallCommand.NAME, InstallCommand),
              (UpgradeCommand.NAME, UpgradeCommand),
              (ConvertCommand.NAME, ConvertCommand),
              (DownloadCommand.NAME, DownloadCommand),
              (DbCommand.NAME, DbCommand),
              (Version.NAME, Version)])
      except Stop, stop:
          if stop.rc != 0:
              print "ERROR:", stop
          else:
              print stop
          sys.exit(stop.rc)
docs: External entry point which calls main() and
      if Stop is raised, calls sys.exit()