# Note: standardHeader 1 and 2 are for legacy data imports from yfinance.history
    # standardHeader3 is for the data from yfinance.download which contains Close Adjusted and the correct Close data
    standardHeader1 = ['', 'Open', 'High', 'Low', 'Close', 'Volume', 'Dividends', 'Stock', 'Splits\n']
    standardHeader2 = ['', 'Open', 'High', 'Low', 'Close', 'Volume', 'Dividends', 'Stock', 'Splits',
                       'Capital', 'Gains\n']
    standardHeader3 = ['', 'Open', 'High', 'Low', 'Close', 'Adj', 'Close', 'Volume\n']
    standardHeader4 = ['Price','Adj','Close','Close','High','Low','Open','Volume\n']
    dataArray: list[PriceData] = []
    if os.path.exists(fileName):
        file = open(fileName, 'r')
        header = ''
        dateFormat = ''
        for index, text in enumerate(file):
            if text == 'Empty DataFrame\n':
                return []
            if index == 0:
                text = ShrinkWhitespace(text)
                header = text.split(' ')
                if (header != standardHeader1 and header != standardHeader2 and
                        header != standardHeader3 and header != standardHeader4):
                    raise Exception('!!!!! ERROR 0011 CHANGED HEADER IN PRICE FILE !!!!!')
           # rest of code to parse file here...



def ShrinkWhitespace(text: str):
    iterate = True
    while iterate:
        x = len(text)
        text = text.replace('  ', ' ')
        y = len(text)
        if x == y:
            iterate = False
    return text