Python tzinfo.utcoffset方法代码示例

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_pickling_subclass(self):
        # Make sure we can pickle/unpickle an instance of a subclass.
        offset = timedelta(minutes=-300)
        orig = PicklableFixedOffset(offset, 'cookie')
        self.assertIsInstance(orig, tzinfo)
        self.assertTrue(type(orig) is PicklableFixedOffset)
        self.assertEqual(orig.utcoffset(None), offset)
        self.assertEqual(orig.tzname(None), 'cookie')
        for pickler, unpickler, proto in pickle_choices:
            green = pickler.dumps(orig, proto)
            derived = unpickler.loads(green)
            self.assertIsInstance(derived, tzinfo)
            self.assertTrue(type(derived) is PicklableFixedOffset)
            self.assertEqual(derived.utcoffset(None), offset)
            self.assertEqual(derived.tzname(None), 'cookie')

#############################################################################
# Base class for testing a particular aspect of timedelta, time, date and
# datetime comparisons. 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_argument_passing(self):
        cls = self.theclass
        # A datetime passes itself on, a time passes None.
        class introspective(tzinfo):
            def tzname(self, dt):    return dt and "real" or "none"
            def utcoffset(self, dt):
                return timedelta(minutes = dt and 42 or -42)
            dst = utcoffset

        obj = cls(1, 2, 3, tzinfo=introspective())

        expected = cls is time and "none" or "real"
        self.assertEqual(obj.tzname(), expected)

        expected = timedelta(minutes=(cls is time and -42 or 42))
        self.assertEqual(obj.utcoffset(), expected)
        self.assertEqual(obj.dst(), expected) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_pickling(self):
        # Try one without a tzinfo.
        args = 6, 7, 23, 20, 59, 1, 64**2
        orig = self.theclass(*args)
        for pickler, unpickler, proto in pickle_choices:
            green = pickler.dumps(orig, proto)
            derived = unpickler.loads(green)
            self.assertEqual(orig, derived)

        # Try one with a tzinfo.
        tinfo = PicklableFixedOffset(-300, 'cookie')
        orig = self.theclass(*args, **{'tzinfo': tinfo})
        derived = self.theclass(1, 1, 1, tzinfo=FixedOffset(0, "", 0))
        for pickler, unpickler, proto in pickle_choices:
            green = pickler.dumps(orig, proto)
            derived = unpickler.loads(green)
            self.assertEqual(orig, derived)
            self.assertIsInstance(derived.tzinfo, PicklableFixedOffset)
            self.assertEqual(derived.utcoffset(), timedelta(minutes=-300))
            self.assertEqual(derived.tzname(), 'cookie') 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_pickling_subclass(self):
        # Make sure we can pickle/unpickle an instance of a subclass.
        offset = timedelta(minutes=-300)
        orig = PicklableFixedOffset(offset, 'cookie')
        self.assertIsInstance(orig, tzinfo)
        self.assertTrue(type(orig) is PicklableFixedOffset)
        self.assertEqual(orig.utcoffset(None), offset)
        self.assertEqual(orig.tzname(None), 'cookie')
        for pickler, unpickler, proto in pickle_choices:
            green = pickler.dumps(orig, proto)
            derived = unpickler.loads(green)
            self.assertIsInstance(derived, tzinfo)
            self.assertTrue(type(derived) is PicklableFixedOffset)
            self.assertEqual(derived.utcoffset(None), offset)
            self.assertEqual(derived.tzname(None), 'cookie')

#############################################################################
# Base clase for testing a particular aspect of timedelta, time, date and
# datetime comparisons. 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_pickling_subclass(self):
        # Make sure we can pickle/unpickle an instance of a subclass.
        offset = timedelta(minutes=-300)
        for otype, args in [
            (PicklableFixedOffset, (offset, 'cookie')),
            (timezone, (offset,)),
            (timezone, (offset, "EST"))]:
            orig = otype(*args)
            oname = orig.tzname(None)
            self.assertIsInstance(orig, tzinfo)
            self.assertIs(type(orig), otype)
            self.assertEqual(orig.utcoffset(None), offset)
            self.assertEqual(orig.tzname(None), oname)
            for pickler, unpickler, proto in pickle_choices:
                green = pickler.dumps(orig, proto)
                derived = unpickler.loads(green)
                self.assertIsInstance(derived, tzinfo)
                self.assertIs(type(derived), otype)
                self.assertEqual(derived.utcoffset(None), offset)
                self.assertEqual(derived.tzname(None), oname) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_issue23600(self):
        DSTDIFF = DSTOFFSET = timedelta(hours=1)

        class UKSummerTime(tzinfo):
            """Simple time zone which pretends to always be in summer time, since
                that's what shows the failure.
            """

            def utcoffset(self, dt):
                return DSTOFFSET

            def dst(self, dt):
                return DSTDIFF

            def tzname(self, dt):
                return 'UKSummerTime'

        tz = UKSummerTime()
        u = datetime(2014, 4, 26, 12, 1, tzinfo=tz)
        t = tz.fromutc(u)
        self.assertEqual(t - t.utcoffset(), u) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def utcoffset(self, dt):
        return self.__offset 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_non_abstractness(self):
        # In order to allow subclasses to get pickled, the C implementation
        # wasn't able to get away with having __init__ raise
        # NotImplementedError.
        useless = tzinfo()
        dt = datetime.max
        self.assertRaises(NotImplementedError, useless.tzname, dt)
        self.assertRaises(NotImplementedError, useless.utcoffset, dt)
        self.assertRaises(NotImplementedError, useless.dst, dt) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_subclass_must_override(self):
        class NotEnough(tzinfo):
            def __init__(self, offset, name):
                self.__offset = offset
                self.__name = name
        self.assertTrue(issubclass(NotEnough, tzinfo))
        ne = NotEnough(3, "NotByALongShot")
        self.assertIsInstance(ne, tzinfo)

        dt = datetime.now()
        self.assertRaises(NotImplementedError, ne.tzname, dt)
        self.assertRaises(NotImplementedError, ne.utcoffset, dt)
        self.assertRaises(NotImplementedError, ne.dst, dt) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_normal(self):
        fo = FixedOffset(3, "Three")
        self.assertIsInstance(fo, tzinfo)
        for dt in datetime.now(), None:
            self.assertEqual(fo.utcoffset(dt), timedelta(minutes=3))
            self.assertEqual(fo.tzname(dt), "Three")
            self.assertEqual(fo.dst(dt), timedelta(minutes=42)) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_bad_tzinfo_classes(self):
        cls = self.theclass
        self.assertRaises(TypeError, cls, 1, 1, 1, tzinfo=12)

        class NiceTry(object):
            def __init__(self): pass
            def utcoffset(self, dt): pass
        self.assertRaises(TypeError, cls, 1, 1, 1, tzinfo=NiceTry)

        class BetterTry(tzinfo):
            def __init__(self): pass
            def utcoffset(self, dt): pass
        b = BetterTry()
        t = cls(1, 1, 1, tzinfo=b)
        self.assertIs(t.tzinfo, b) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_utc_offset_out_of_bounds(self):
        class Edgy(tzinfo):
            def __init__(self, offset):
                self.offset = timedelta(minutes=offset)
            def utcoffset(self, dt):
                return self.offset

        cls = self.theclass
        for offset, legit in ((-1440, False),
                              (-1439, True),
                              (1439, True),
                              (1440, False)):
            if cls is time:
                t = cls(1, 2, 3, tzinfo=Edgy(offset))
            elif cls is datetime:
                t = cls(6, 6, 6, 1, 2, 3, tzinfo=Edgy(offset))
            else:
                assert 0, "impossible"
            if legit:
                aofs = abs(offset)
                h, m = divmod(aofs, 60)
                tag = "%c%02d:%02d" % (offset < 0 and '-' or '+', h, m)
                if isinstance(t, datetime):
                    t = t.timetz()
                self.assertEqual(str(t), "01:02:03" + tag)
            else:
                self.assertRaises(ValueError, str, t) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_more_bool(self):
        # Test cases with non-None tzinfo.
        cls = self.theclass

        t = cls(0, tzinfo=FixedOffset(-300, ""))
        self.assertTrue(t)

        t = cls(5, tzinfo=FixedOffset(-300, ""))
        self.assertTrue(t)

        t = cls(5, tzinfo=FixedOffset(300, ""))
        self.assertFalse(t)

        t = cls(23, 59, tzinfo=FixedOffset(23*60 + 59, ""))
        self.assertFalse(t)

        # Mostly ensuring this doesn't overflow internally.
        t = cls(0, tzinfo=FixedOffset(23*60 + 59, ""))
        self.assertTrue(t)

        # But this should yield a value error -- the utcoffset is bogus.
        t = cls(0, tzinfo=FixedOffset(24*60, ""))
        self.assertRaises(ValueError, lambda: bool(t))

        # Likewise.
        t = cls(0, tzinfo=FixedOffset(-24*60, ""))
        self.assertRaises(ValueError, lambda: bool(t)) 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_mixed_compare(self):
        t1 = time(1, 2, 3)
        t2 = time(1, 2, 3)
        self.assertEqual(t1, t2)
        t2 = t2.replace(tzinfo=None)
        self.assertEqual(t1, t2)
        t2 = t2.replace(tzinfo=FixedOffset(None, ""))
        self.assertEqual(t1, t2)
        t2 = t2.replace(tzinfo=FixedOffset(0, ""))
        self.assertRaises(TypeError, lambda: t1 == t2)

        # In time w/ identical tzinfo objects, utcoffset is ignored.
        class Varies(tzinfo):
            def __init__(self):
                self.offset = timedelta(minutes=22)
            def utcoffset(self, t):
                self.offset += timedelta(minutes=1)
                return self.offset

        v = Varies()
        t1 = t2.replace(tzinfo=v)
        t2 = t2.replace(tzinfo=v)
        self.assertEqual(t1.utcoffset(), timedelta(minutes=23))
        self.assertEqual(t2.utcoffset(), timedelta(minutes=24))
        self.assertEqual(t1, t2)

        # But if they're not identical, it isn't ignored.
        t2 = t2.replace(tzinfo=Varies())
        self.assertTrue(t1 < t2)  # t1's offset counter still going up 

# 需要导入模块: from datetime import tzinfo [as 别名]
# 或者: from datetime.tzinfo import utcoffset [as 别名]
def test_subclass_timetz(self):

        class C(self.theclass):
            theAnswer = 42

            def __new__(cls, *args, **kws):
                temp = kws.copy()
                extra = temp.pop('extra')
                result = self.theclass.__new__(cls, *args, **temp)
                result.extra = extra
                return result

            def newmeth(self, start):
                return start + self.hour + self.second

        args = 4, 5, 6, 500, FixedOffset(-300, "EST", 1)

        dt1 = self.theclass(*args)
        dt2 = C(*args, **{'extra': 7})

        self.assertEqual(dt2.__class__, C)
        self.assertEqual(dt2.theAnswer, 42)
        self.assertEqual(dt2.extra, 7)
        self.assertEqual(dt1.utcoffset(), dt2.utcoffset())
        self.assertEqual(dt2.newmeth(-7), dt1.hour + dt1.second - 7)


# Testing datetime objects with a non-None tzinfo.