superjson/pkg/dateutil/rrule.py
def before(self, dt, inc=False):
        """ Returns the last recurrence before the given datetime instance. The
            inc keyword defines what happens if dt is an occurrence. With
            inc=True, if dt itself is an occurrence, it will be returned. """
        if self._cache_complete:
            gen = self._cache
        else:
            gen = self
        last = None
        if inc:
            for i in gen:
                if i > dt:
                    break
                last = i
        else:
            for i in gen:
                if i >= dt:
                    break
                last = i
        return last
def before(self, dt, inc=False):
        """ Returns the last recurrence before the given datetime instance. The
            inc keyword defines what happens if dt is an occurrence. With
            inc=True, if dt itself is an occurrence, it will be returned. """
        if self._cache_complete:
            gen = self._cache
        else:
            gen = self
        last = None
        if inc:
            for i in gen:
                if i > dt:
                    break
                last = i
        else:
            for i in gen:
                if i >= dt:
                    break
                last = i
        return last
Returns the last recurrence before the given datetime instance. The
            inc keyword defines what happens if dt is an occurrence. With
            inc=True, if dt itself is an occurrence, it will be returned.