def parseAgo(self, s, l, tok):
        ago = self.combineTokens(tok)
        delta = tok["unit"]
        start = timedelta(days=ago) - datetime.today()
        end = start + timedelta(days=delta)
        return (start, end)
dataset/ETHPy150Open haystack/eyebrowse-server/common/npl/date_parser.py/DateRangeParser.parseAgo/swapped operands of `-`