Plotting financial data with matplotlib

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Python2.7

I saw this: http://matplotlib.org/examples/pylab_examples/finance_work2.html

and being the lazy bum that I am, decided to steal it and use it for Indian stocks. Now matplotib.finance defines:

def fetch_historical_yahoo(ticker, date1, date2, cachename=None,dividends=False):
.....
urlFmt = 'http://table.finance.yahoo.com/table.csv?a=%d&b=%d&c=%d&d=%d&e=%d&f=%d&s=%s&y=0&g=%s&ignore=.csv'


url = urlFmt % (d1[0], d1[1], d1[2],d2[0], d2[1], d2[2], ticker, g)
.....
and then does
urlopen(url)

But the format for getting data from Yahoo India is slightly different. So I went to in.finance.yahoo.com and got the link to historical prices of Reliance Industries as:

http://ichart.finance.yahoo.com/table.csv?s=RELIANCE.NS&a=03&b=1&c=2012&d=02&e=31&f=2013&g=d&ignore=.csv

But now I pop this into a function "indian.py" as: urlFmt='http://ichart.finance.yahoo.com/table.csv?s=%s&d=%d&e=%d&f=%d&g=d&a=%d&b=%d&c=%d&ignore=.csv'

When I run this, I get a HTTP 404 error.

What am I doing wrong?