In the line articles.append You should have a 'date':time.time()
This will give all articles the default date. If you want the correct publication date you should parse the HTML for it.
Note that you can define a cleanup function to logout. Something like
Code:
def cleanup(self):
self.browser.open('http://wsj.com/logout')
EDIT: Oops should be time.ctime() not time.time()