events.py 文件源码

def _occurrences_after_generator(self, after=None, tzinfo=pytz.utc):
        """
        returns a generator that produces unpresisted occurrences after the
        datetime ``after``.
        """

        if after is None:
            after = timezone.now()
        rule = self.get_rrule_object()
        if rule is None:
            if self.end > after:
                yield self._create_occurrence(self.start, self.end)
            raise StopIteration
        date_iter = iter(rule)
        difference = self.end - self.start
        while True:
            o_start = next(date_iter)
            if self.end_recurring_period and o_start > self.end_recurring_period:
                raise StopIteration
            o_end = o_start + difference
            if o_end > after:
                yield self._create_occurrence(o_start, o_end)