我曾尝试从雅虎财经下载市场数据，但一直出错。这是我的密码：

import yfinance as yf

# import data of different asset classes

VT = yf.download("VT",interval="1d", start="2017-01-01", end="2021-01-01") #stocks
BND = yf.download("BND",interval="1d", start="2017-01-01", end="2021-01-01") #bonds
VNQ = yf.download("VNG",interval="1d", start="2017-01-01", end="2021-01-01") #real estate
DBC = yf.download("DBC",interval="1d", start="2017-01-01", end="2021-01-01") #commodities

此错误显示为：

KeyboardInterrupt                         Traceback (most recent call last)
<ipython-input-3-2a474e2089b7> in <module>
      1 #import data of different asset classes
----> 2 VT = yf.download("VT",interval="1d", start="2017-01-01", end="2021-01-01") #stocks
      3 BND = yf.download("BND",interval="1d", start="2017-01-01", end="2021-01-01") #bonds
      4 VNQ = yf.download("VNG",interval="1d", start="2017-01-01", end="2021-01-01") #real estate
      5 DBC = yf.download("DBC",interval="1d", start="2017-01-01", end="2021-01-01") #commodities

~/anaconda3/lib/python3.7/site-packages/yfinance/multi.py in download(tickers, start, end, actions, threads, group_by, auto_adjust, back_adjust, progress, period, interval, prepost, proxy, rounding,**kwargs)
     93                                    rounding=rounding)
     94         while len(shared._DFS) < len(tickers):
---> 95             _time.sleep(0.01)
     96 
     97     # download synchronously

KeyboardInterrupt: