How to extract tables from websites in Python

Here,

http://www.ffiec.gov/census/report.aspx?year=2011&state=01&report=demographic&msa=11500

is a table. My goal is to extract the table and save it to a CSV file. I wrote some code:

import urllib
import os

web = urllib.urlopen("http://www.ffiec.gov/census/report.aspx?year=2011&state=01&report=demographic&msa=11500")

s = web.read()
web.close()

ff = open(r"D:\ex\python_ex\urllib\output.txt", "w")
ff.write(s)
ff.close()

I don't know how to go on from here. Anyone who can help? Thanks!