1.数据获取
import pandas as pd
import datetime
import pandas_datareader.data as web
import matplotlib.pyplot as plt
import seaborn as sns
from statsmodels.tsa.arima_model import ARIMA
from statsmodels.graphics.tsaplots import plot_acf, plot_pacf
#可以适用接口从雅虎获取股票数据
start=datetime.datetime(2000,1,1)
end=da
