pendulum.py 文件源码

def _last_of_month(self, day_of_week=None):
        """
        Modify to the last occurrence of a given day of the week
        in the current month. If no day_of_week is provided,
        modify to the last day of the month. Use the supplied consts
        to indicate the desired day_of_week, ex. Pendulum.MONDAY.

        :type day_of_week: int or None

        :rtype: Pendulum
        """
        dt = self.start_of('day')

        if day_of_week is None:
            return dt.day_(self.days_in_month)

        month = calendar.monthcalendar(dt.year, dt.month)

        calendar_day = (day_of_week - 1) % 7

        if month[-1][calendar_day] > 0:
            day_of_month = month[-1][calendar_day]
        else:
            day_of_month = month[-2][calendar_day]

        return dt.day_(day_of_month)