code: def main():
      
      commands = {'hash': peep_hash,
                  'install': peep_install,
                  'port': peep_port}
      try:
          if len(argv) >= 2 and argv[1] in commands:
              return commands[argv[1]](argv[2:])
          else:
              # Fall through to top-level pip main() for everything else:
              return pip.main()
      except PipException as exc:
          return exc.error_code
docs: Be the top-level entrypoint. Return a shell status code.