attributeError：＆＃x27; numpy.float64＆＃x27;对象没有属性＆＃x27;滚动＆＃x27;

Question

我想在SMA中再次计算RSI数字并对其进行处理。 但是，与主题类似的错误发生。 “ attributeError：'numpy.float64'对象没有属性'滚动'”

import talib
import requests
import pandas as pd
import time

class RSI:
    def rsi(symbol, timeinterval, limit, period):
            
            coin = Can.get_fu_coin(symbol, timeinterval, limit)
            
            coin['close'] = coin['close'].astype(float)
            data = coin['close']
            
            period = period
            
            delta = data.diff()
            
            up, down = delta.copy(), delta.copy()
            up[up < 0] = 0
            down[down > 0] = 0
            
            _gain = up.ewm(com = (period - 1), min_periods = period).mean()
            _loss = down.abs().ewm(com = (period - 1), min_periods = period).mean()
        
            RS = _gain / _loss
        
            rsi = 100 - (100 / (1 + RS))
            rsi = rsi.iloc[-1]
            rsi = round(rsi, 4)
            
            return rsi
    
    def rma(symbol, timeinterval, limit, period, n):
        data = RSI.rsi(symbol, timeinterval, limit, period).rolling(n)
        return talib.SMA(data,n)

RSI.rma('BTCUSDT', '1m', '1000', 14, 7)