Getting stuck in calculating average turnover

[Niranjan Godbole]

Trying to calculate average turnover

def __init__(self):
        self.addminperiod(260)
        self.stocks = self.datas[2:]

        for d in self.stocks:
            self.inds[d] = {}
            turnover = d.close * d.volume
            print (d.open[0],d.high[0],d.low[0],d.close[0],d.volume[0], d.openinterest[0])
            self.inds[d]["avg_turnover"] = bt.indicators.SimpleMovingAverage(turnover,period=20)

ohlcv data is printed correctly

In next function, when i try to print average turnover print(self.inds[d]["avg_turnover"][0]) , I am getting nan as output.. expecting average turnover.

Any pointers would be very useful.

[ab_trader]

post whole script from the beginning to the end please.