datetime.py 文件源码

def parse_time_period(cls, period):
        """ try to parse specified time period

        :param period: specified period
        """
        # catch single value
        if not isinstance(period, dict):
            period = dict(value=period)

        # try to parse specified period
        try:
            return pd.Timedelta(**period).delta
        except Exception as ex:
            cls.log().critical('unable to parse period: %s', str(period))
            raise ex