python adx indicator

1import yfinance as yf
2aapl = yf.download('AAPL', '2017-1-1','2019-12-18')
3aapl['Adj Open'] = aapl.Open * aapl['Adj Close']/aapl['Close']
4aapl['Adj High'] = aapl.High * aapl['Adj Close']/aapl['Close']
5aapl['Adj Low'] = aapl.Low * aapl['Adj Close']/aapl['Close']
6aapl.dropna(inplace=True)
7from ta.trend import ADXIndicator
8adxI = ADXIndicator(aapl['Adj High'],aapl['Adj Low'],aapl['Adj Close'],14,False)
9aapl['pos_directional_indicator'] = adxI.adx_pos()
10aapl['neg_directional_indicator'] = adxI.adx_neg()
11aapl['adx'] = adxI.adx()
12aapl.tail()