python-pandas-布林带算法

import pandas as pd
import numpy as np 
import matplotlib.pyplot as plt
#读取数据
data=pd.read_csv('C:/Users/Administrator/Desktop/rb000.csv',encoding='gbk')
data=data.iloc[::,:7]
data.columns=['time','oepn','high','low','close','amt','opi']
#处理数据
data['mid']=data['close'].rolling(26).mean()
data['tmp2']=data['close'].rolling(20).std()
data['top']=data['mid']+2*data['tmp2']
data['bottom']=data['mid']-2*data['tmp2']
#data.tail()