python类DateTimeRange()的实例源码

def test_adapt_date_range(self):
        from psycopg2.extras import DateRange, DateTimeRange, DateTimeTZRange
        from psycopg2.tz import FixedOffsetTimezone
        cur = self.conn.cursor()

        d1 = date(2012, 01, 01)
        d2 = date(2012, 12, 31)
        r = DateRange(d1, d2)
        cur.execute("select %s", (r,))
        r1 = cur.fetchone()[0]
        self.assert_(isinstance(r1, DateRange))
        self.assertEqual(r1.lower, d1)
        self.assertEqual(r1.upper, d2)
        self.assert_(r1.lower_inc)
        self.assert_(not r1.upper_inc)

        r = DateTimeRange(empty=True)
        cur.execute("select %s", (r,))
        r1 = cur.fetchone()[0]
        self.assert_(isinstance(r1, DateTimeRange))
        self.assert_(r1.isempty)

        ts1 = datetime(2000, 1, 1, tzinfo=FixedOffsetTimezone(600))
        ts2 = datetime(2000, 12, 31, 23, 59, 59, 999,
                       tzinfo=FixedOffsetTimezone(600))
        r = DateTimeTZRange(ts1, ts2, '(]')
        cur.execute("select %s", (r,))
        r1 = cur.fetchone()[0]
        self.assert_(isinstance(r1, DateTimeTZRange))
        self.assertEqual(r1.lower, ts1)
        self.assertEqual(r1.upper, ts2)
        self.assert_(not r1.lower_inc)
        self.assert_(r1.upper_inc)