title: Download historical stock index data
body: <p>I have the following data of stock index (NSE:NIFTY50) from google finance <a href="https://www.google.com/finance/historical?cid=207437&amp;startdate=Jan%201%2C%201971&amp;enddate=Jul%201%2C%202017&amp;num=30&amp;ei=mGBXWfnXKYim0gSDuovIBw&amp;start=30" rel="nofollow noreferrer">here</a>.I want to download the above data as csv so that I can do some analysis on it. How do I download it.? I would prefer to use python if I can.</p>