loop to download again

def get_data():

    stocks = ['A', 'B', 'C', 'D', 'E','F','G','H']

    for x in stocks:

        while True:
            tws.reqHistoricalData(x)

            data = pd.DataFrame(reqHistoricalData)

            if not data.empty:
                break

            print("Data is empty")

        data.to_csv("Your Path")