TypeError: other must be a MultiIndex or a list of tuples

[lfferraz]

I have this problem when I try to run the below code, I am using the Apple M1 and a python version 3.9.13, because compatiblity whith pandas and numpy. Anybody now how to solve this problem?

from backtesting import Backtest, Strategy
from backtesting.lib import crossover

from backtesting.test import SMA, GOOG

import datetime
import yfinance as yf

ticker = "GOOG"

start = datetime.datetime(2021,1,1)
end = datetime.datetime(2023,12,31)

ticker_ohlc = yf.download(ticker,start,end)

class SmaCross(Strategy):
n1=10
n2=70

def init(self):
    price = self.data.Close
    self.ma1 = self.I(SMA, price, self.n1)
    self.ma2 = self.I(SMA, price, self.n2)

def next(self):
    if crossover(self.ma1, self.ma2):
        self.buy()
    elif crossover(self.ma2, self.ma1):
        self.sell()

bt = Backtest(ticker_ohlc, SmaCross, cash=10000, commission=.002, exclusive_orders=True)
stats = bt.run()

print(stats)
print(stats['_trades'].tail(20))
print(stats['_equity_curve'].tail(20))

#bt.plot()

result_optimize, heatmap = bt.optimize(n1=range(5, 70, 5),
n2=range(10, 100, 5),
maximize='Equity Final [$]',
constraint=lambda param: param.n1 < param.n2,
return_heatmap=True)

#print(result_optimize)
#print(result_optimize['_strategy'])
print(heatmap)

hm = heatmap.groupby(['n1', 'n2']).mean().unstack()

print(hm)

[iimka]

I don't have any problems, and the code is functional. What output do you see?

[Rechousa]

Hi @lfferraz, I was having the same issue. Downgrading yfinance to v0.2.44 worked for me. Maybe this isn't the best solution, but it's a quick one. Hope it helps