我们从Python开源项目中，提取了以下46个代码示例，用于说明如何使用datetime.tzinfo.__new__()。
def test_subclass_date(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.year + self.month args = 2003, 4, 14 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.toordinal(), dt2.toordinal()) self.assertEqual(dt2.newmeth(-7), dt1.year + dt1.month - 7)
def test_subclass_time(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 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.isoformat(), dt2.isoformat()) self.assertEqual(dt2.newmeth(-7), dt1.hour + dt1.second - 7)
def __new__(cls, offset, name=_Omitted): if not isinstance(offset, timedelta): raise TypeError("offset must be a timedelta") if name is cls._Omitted: if not offset: return cls.utc name = None elif not isinstance(name, str): raise TypeError("name must be a string") if not cls._minoffset <= offset <= cls._maxoffset: raise ValueError("offset must be a timedelta" " strictly between -timedelta(hours=24) and" " timedelta(hours=24).") if (offset.microseconds != 0 or offset.seconds % 60 != 0): raise ValueError("offset must be a timedelta" " representing a whole number of minutes") return cls._create(offset, name)
def test_pickling_base(self): # There's no point to pickling tzinfo objects on their own (they # carry no data), but they need to be picklable anyway else # concrete subclasses can't be pickled. orig = tzinfo.__new__(tzinfo) self.assertTrue(type(orig) is tzinfo) for pickler, unpickler, proto in pickle_choices: green = pickler.dumps(orig, proto) derived = unpickler.loads(green) self.assertTrue(type(derived) is tzinfo)
def test_subclass_datetime(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.year + self.month + self.second args = 2003, 4, 14, 12, 13, 41 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.toordinal(), dt2.toordinal()) self.assertEqual(dt2.newmeth(-7), dt1.year + dt1.month + dt1.second - 7)
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.
def test_pickling_base(self): # There's no point to pickling tzinfo objects on their own (they # carry no data), but they need to be picklable anyway else # concrete subclasses can't be pickled. orig = tzinfo.__new__(tzinfo) self.assertIs(type(orig), tzinfo) for pickler, unpickler, proto in pickle_choices: green = pickler.dumps(orig, proto) derived = unpickler.loads(green) self.assertIs(type(derived), tzinfo)
def _create(cls, offset, name=None): self = tzinfo.__new__(cls) self._offset = offset self._name = name return self
