human
Can you provide a the Python program you requested given the following:
Complete the below
def _render_filenames(filenames, zip_file, saltenv, template):

    ''''Process markup in the :param:`filenames` and :param:`zipfile` variables (NOT the
    files under the paths they ultimately point to) according to the markup
    format provided by :param:`template`.'
    '''
assistant
#Here is the Python program you requested.
    if (not template):
        return (filenames, zip_file)
    if (template not in salt.utils.templates.TEMPLATE_REGISTRY):
        raise CommandExecutionError('Attempted    to    render    file    paths    with    unavailable    engine    {0}'.format(template))
    kwargs = {}
    kwargs['salt'] = __salt__
    kwargs['pillar'] = __pillar__
    kwargs['grains'] = __grains__
    kwargs['opts'] = __opts__
    kwargs['saltenv'] = saltenv
    def _render(contents):
        '\n                                Render    :param:`contents`    into    a    literal    pathname    by    writing    it    to    a\n                                temp    file,    rendering    that    file,    and    returning    the    result.\n                                '
        tmp_path_fn = salt.utils.files.mkstemp()
        with salt.utils.files.fopen(tmp_path_fn, 'w+') as fp_:
            fp_.write(contents)
        data = salt.utils.templates.TEMPLATE_REGISTRY[template](tmp_path_fn, to_str=True, **kwargs)
        salt.utils.files.safe_rm(tmp_path_fn)
        if (not data['result']):
            raise CommandExecutionError('Failed    to    render    file    path    with    error:    {0}'.format(data['data']))
        else:
            return data['data']
    filenames = _render(filenames)
    zip_file = _render(zip_file)
    return (filenames, zip_file)