>>> nse.get_index_list()
['NIFTY 50 Pre Open',
 'NIFTY 50',
 'NIFTY NEXT 50',
 'NIFTY100 LIQ 15',
 'NIFTY BANK',
 'INDIA VIX',
 'NIFTY 100',
 'NIFTY 500',
 'NIFTY MIDCAP 100',
 'NIFTY MIDCAP 50',
 'NIFTY INFRA',