Pandas Datareader for multiindex stock data

datareader.py

import datetime
import numpy as np
import pandas as pd
import pandas_datareader.data as pdr

# fetch multiple asset data
def getMultiAssetData(ticketList, date_from, date_to):
    def getData(ticker):
        data = pdr.DataReader(ticker, 'yahoo', date_from, date_to)
        return data
    datas = map(getData, tickerList)
    return pd.concat(datas, keys=tickerList, names=['Ticker', 'Date'])

date_from = datetime.date(2020, 1, 1)
date_to = datetime.date(2020, 8, 31)
tickerList = ['AAPL', 'AMZN', 'CCEP', 'FB', 'JNJ', 'JWN', 'NVS', 'PG']
multiData = getMultiAssetData(tickerList, date_from, date_to)
df = multiData.copy()