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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def parseFeed(filename, yesterday):
 """Parse an RSS feed and filter only entries that are newer than yesterday."""

    dom = xml.dom.minidom.parse(filename)

    getText = lambda node, tag: node.getElementsByTagName(tag)[0].childNodes[0].data
    getNode = lambda tag: dom.getElementsByTagName(tag)

    content = getNode('channel')[0] # Only one channel node

    feedTitle = getText(content, 'title')
    feedLink = getText(content, 'link')
    feedDesc = getText(content, 'description')

    feed = Feed(feedTitle, feedLink, feedDesc)

    for item in getNode('item'):
        itemDate = time.strptime(getText(item, 'pubDate'), '%a, %d %b %Y %H:%M:%S GMT')
        if (itemDate > yesterday): # If newer than yesterday
            feed.addItem(getText(item, 'title'),
                         getText(item, 'link'),
                         getText(item, 'description'),
                         getText(item, 'pubDate'))
    return feed