我遵循了一個教程，但我不喜歡結果，所以我試圖優化它，但我似乎無法找到一種方法來始終制作新的數據框。我知道這是 while 循環的結果。所以我想要的是附加到我制作的數據框的價格。 提前致謝！import pandas as pdimport bs4import requestsfrom bs4 import BeautifulSoupimport datetime#getting actual pricedef Real_time_Price(stock):    url = ('https://finance.yahoo.com/quote/'+stock+'?p='+stock)    r=requests.get(url)    web_content=BeautifulSoup(r.text, 'lxml')    web_content = web_content.find('div',{'class':"My(6px) Pos(r) smartphone_Mt(6px)"})    web_content = web_content.find('span').text        return web_content這就是我的問題開始的地方while True:        price = []    col = []    time_stamp = datetime.datetime.now()    #de milli seconden wegknallen.    time_stamp = time_stamp.strftime("%Y-%m-%d %H:%M:%S")    #welke stocks wilje checken    ticker_symbols = ['TSLA','AAPL','MSFT']    for stock in ticker_symbols:        price.append(Real_time_Price(stock))    #getting it into a pandas dataframe    #You want [data] for pandas to understand they're rows.    df=pd.DataFrame(data=[price], index=[time_stamp], columns=ticker_symbols)    print(df)