utils.py 文件源码

def fetch_feed_if_updated(url, date):
    """
    Fetches an RSS feed if has been updated since a given date.

    Args:
        url: URL to the RSS feed
        date: Date as time_struct.

    Returns:
        FeedParser object representing the feed if the feed has been
        updated, None otherwise.
    """
    feed = feedparser.parse(url)
    if feed_updated(feed, date):
        return feed
    else:
        return None