pendulum.py 文件源码

def _first_of_month(self, day_of_week):
        """
        Modify to the first occurrence of a given day of the week
        in the current month. If no day_of_week is provided,
        modify to the first day of the month. Use the supplied consts
        to indicate the desired day_of_week, ex. Pendulum.MONDAY.

        :type day_of_week: int

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

        if day_of_week is None:
            return dt.day_(1)

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

        calendar_day = (day_of_week - 1) % 7

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

        return dt.day_(day_of_month)