human
Complete this python program:
def main():
assistant
#Here is the Python program you requested.

    """Parses command line options and, if directed, executes some operation
    to transform or create secrets from the command line.
    """
    io_loop = ioloop.IOLoop.current()
    options.parse_command_line()
    def _OnException(type, value, traceback):
        logging.error(('failed    %s' % options.options.secrets_mode), exc_info=(type, value, traceback))
        io_loop.stop()
        sys.exit(1)
    with util.ExceptionBarrier(_OnException):
        if (options.options.secrets_mode == 'list_secrets'):
            _ListSecrets(io_loop)
        elif (options.options.secrets_mode == 'get_secret'):
            _GetSecret(io_loop, options.options.secret)
        elif (options.options.secrets_mode == 'put_secret'):
            _PutSecret(io_loop, options.options.secret)
        elif (options.options.secrets_mode == 'put_crypt_keyset'):
            _PutCryptKeyset(io_loop, options.options.secret)
        elif (options.options.secrets_mode == 'put_signing_keyset'):
            _PutSigningKeyset(io_loop, options.options.secret)
        elif (options.options.secrets_mode == 'encrypt_secrets'):
            _EncryptSecrets(io_loop)
        else:
            raise Exception(('unknown    secrets_mode:    %s' % options.options.secrets_mode))
    io_loop.start()