human
Complete the below
def etag(f):

    ''''A decorator that add an ETag header to the response and checks for the "If-Match" and "If-Not-Match" headers to
    return an appropriate response.
    :param f: A GET or HEAD flask method to wrap
    :return: The method\'s response with the ETag and Cache-Control headers, raises a 412 error or returns a 304 response'
    '''
 Can you provide a the Python code you requested?
assistant
#Here is the Python code you requested.
    @wraps(f)
    def wrapped(*args, **kwargs):
        assert (request.method in [u'HEAD', u'GET']), u'@etag    is    only    supported    for    GET    requests'
        rv = f(*args, **kwargs)
        rv = make_response(rv)
        content_headers = ((rv.headers.get(u'link', u'') + rv.headers.get(u'count', u'')) + rv.headers.get(u'total-count', u''))
        data = (rv.get_data().decode() + content_headers).encode()
        etag = generate_etag(data)
        rv.headers[u'Cache-Control'] = u'max-age=86400'
        rv.headers[u'ETag'] = etag
        if_match = request.headers.get(u'If-Match')
        if_none_match = request.headers.get(u'If-None-Match')
        if if_match:
            etag_list = [tag.strip() for tag in if_match.split(u',')]
            if ((etag not in etag_list) and (u'*' not in etag_list)):
                raise PreconditionFailed(u'etag    does    not    match')
        elif if_none_match:
            etag_list = [tag.strip() for tag in if_none_match.split(u',')]
            if ((etag in etag_list) or (u'*' in etag_list)):
                raise NotModified
        return rv
    return wrapped