Nifty script to get quotes from yahoo stock feed

I wrote this quick python script to pull down stock quotes from the yahoo server. I'd like to figure out how to get it to retrieve historical data as well.

# Retrieve the stock quote, and additional specified info according to the
#following table, which maps to the yahoo quote service data/key matrix

import sys
import os
import urllib
import re

class YahooStockQuoter:
def __init__(self):
self.baseUrl = "http://quote.yahoo.com/d/quotes.csv?s="
def getQuote(self,symbol,args):
url = self.baseUrl + symbol + "&f=" + args
try:
quoteInfo = urllib.urlopen(url).read()
except(e),x:
print e + x
else:
#Strip out the simple HTML tags present in the reply
quoteInfo = re.sub("<.*?>",'',quoteInfo)
return quoteInfo
if __name__ == '__main__':
if len(sys.argv) < 2:
print "Usage: %s Stock/Option_symbol additional_args" % sys.argv[0]
print "If no args are give, then the symbol, and last price are retrieved"
exit

if len(sys.argv)==2:
print "Using default args for symbol, and last price"
args="snl"
else:
args=sys.argv[2]

quoter = YahooStockQuoter()
quote = quoter.getQuote(sys.argv[1],args)
print quote

#a Ask
#b Bid
#b4 Book Value
#c1 Change
#c8 After Hours Change (Real-time)
#d2 Trade Date
#e7 EPS Estimate Current Year
#f6 Float Shares
#j 52-week Low
#g3 Annualized Gain
#g6 Holdings Gain (Real-time)
#j1 Market Capitalization
#j5 Change From 52-week Low
#k2 Change Percent (Real-time)
#k5 Percebt Change From 52-week High
#l2 High Limit
#m2 Day's Range (Real-time)
#m5 Change From 200-day Moving Average
#m8 Percent Change From 50-day Moving Average
#o Open
#p2 Change in Percent
#q Ex-Dividend Date
#r2 P/E Ratio (Real-time)
#r7 Price/EPS Estimate Next Year
#s7 Short Ratio
#t7 Ticker Trend
#v1 Holdings Value
#w1 Day's Value Change
#y Dividend Yield
#a2 Average Daily Volume
#b2 Ask (Real-time)
#b6 Bid Size
#c3 Commission
#d Dividend/Share
#e Earnings/Share
#e8 EPS Estimate Next Year
#g Day's Low
#k 52-week High
#g4 Holdings Gain
#i More Info
#j3 Market Cap (Real-time)
#j6 Percent Change From 52-week Low
#k3 Last Trade Size
#l Last Trade (With Time)
#l3 Low Limit
#m3 50-day Moving Average
#m6 Percent Change From 200-day Moving Average
#n Name
#p Previous Close
#p5 Price/Sales
#r P/E Ratio
#r5 PEG Ratio
#s Symbol
#t1 Last Trade Time
#t8 1 yr Target Price
#v7 Holdings Value (Real-time)
#w4 Day's Value Change (Real-time)
#a5 Ask Size
#b3 Bid (Real-time)
#c Change & Percent Change
#c6 Change (Real-time)
#d1 Last Trade Date
#e1 Error Indication (returned for symbol changed / invalid)
#e9 EPS Estimate Next Quarter
#h Day's High
#g1 Holdings Gain Percent
#g5 Holdings Gain Percent (Real-time)
#i5 Order Book (Real-time)
#j4 EBITDA
#k1 Last Trade (Real-time) With Time
#k4 Change From 52-week High
#l1 Last Trade (Price Only)
#m Day's Range
#m4 200-day Moving Average
#m7 Change From 50-day Moving Average
#n4 Notes
#p1 Price Paid
#p6 Price/Book
#r1 Dividend Pay Date
#r6 Price/EPS Estimate Current Year
#s1 Shares Owned
#t6 Trade Links
#v Volume
#w 52-week Range
#x Stock Exchange