How to use the yfinance.utils.empty_df function in yfinance

self._scrape_url = 'https://finance.yahoo.com/quote'

        self._fundamentals = False
        self._info = None
        self._sustainability = None
        self._recommendations = None
        self._major_holders = None
        self._institutional_holders = None
        self._isin = None

        self._calendar = None
        self._expirations = {}

        self._earnings = {
            "yearly": utils.empty_df(),
            "quarterly": utils.empty_df()}
        self._financials = {
            "yearly": utils.empty_df(),
            "quarterly": utils.empty_df()}
        self._balancesheet = {
            "yearly": utils.empty_df(),
            "quarterly": utils.empty_df()}
        self._cashflow = {
            "yearly": utils.empty_df(),
            "quarterly": utils.empty_df()}

debug_mode = True
        if "debug" in kwargs and isinstance(kwargs["debug"], bool):
            debug_mode = kwargs["debug"]

        err_msg = "No data found for this date range, symbol may be delisted"
        if "chart" in data and data["chart"]["error"]:
            err_msg = data["chart"]["error"]["description"]
            shared._DFS[self.ticker] = utils.empty_df()
            shared._ERRORS[self.ticker] = err_msg
            if "many" not in kwargs and debug_mode:
                print('- %s: %s' % (self.ticker, err_msg))
            return shared._DFS[self.ticker]

        elif "chart" not in data or data["chart"]["result"] is None or \
                not data["chart"]["result"]:
            shared._DFS[self.ticker] = utils.empty_df()
            shared._ERRORS[self.ticker] = err_msg
            if "many" not in kwargs and debug_mode:
                print('- %s: %s' % (self.ticker, err_msg))
            return shared._DFS[self.ticker]

        # parse quotes
        try:
            quotes = utils.parse_quotes(data["chart"]["result"][0], tz)
        except Exception:
            shared._DFS[self.ticker] = utils.empty_df()
            shared._ERRORS[self.ticker] = err_msg
            if "many" not in kwargs and debug_mode:
                print('- %s: %s' % (self.ticker, err_msg))
            return shared._DFS[self.ticker]

        # 2) fix weired bug with Yahoo! - returning 60m for 30m bars