regex - How to validate if text is a stock ticker in python

Question

I'm trying to find an efficient way of validating if each element in a list is a stock ticker. The code below works but its too slow I'm looking for a faster way, Thanks in advance I can clarify anything if needed

tickers_post = re.findall("[A-Z]{3,4}", str(post))  # RegEx to extract tickers from a list

def tickerData(tic):
    yf.Ticker(tic).info

count = len(tickers_post) -1

while count >= 0:
    try:
        tickerData(str(tickers_post[count]))

    except:
        print('Not a ticker:' + tickers_post[count])
        tickers_post.pop(count)
    count = count - 1

Print(ticker_post)

Answer 1

等待大神答复