from pandas_datareader import data as pdr
import datetime
import fix_yahoo_finance as yf

start_sp = datetime.datetime(2000, 12, 12)
end_sp = datetime.datetime(2016, 12, 12)
yf.pdr_override()
sp500 = pdr.get_data_yahoo('^GSPC',
                           start_sp, end_sp)

prices = pd.DataFrame()
prices['SP500'] = sp500['Adj Close']