html_doc = """
<html>
<body>
<span class="blue">here is a lot of text that i don't need</span>
<span class="blue">this is the span i need because it contains 04/18/13 7:29pm</span>
<span class="blue">04/19/13 7:30pm</span>
<span class="blue">Posted on 04/20/13 10:31pm</span>
</body>
</html>
"""
soup = BeautifulSoup(html_doc)
spans = soup.find_all('span', {'class': 'blue'})
Как найти спаны с определенным классом, содержащим определенный текст, используя красивый суп и ре?