def get_user(self, selector):
user_loader = XPathItemLoader(item = YahooUser(), selector = selector)
user_loader.add_xpath('user_name', './/span[contains(@class, "user")]//span[contains(@class, "fn")]/text()')
user_loader.add_xpath('user_url', './/span[@class="user"]//a[@class="url"]/@href')
user_loader.add_value('user_id', re.match(r'http://answers\.yahoo\.com/my/profile\?show=(.*)',
user_loader.get_output_value('user_url')
).group(1))
if user_loader.get_collected_values('user_name'):
return user_loader.load_item()
else:
return None
