datetime.datetime and datetime.time can now be subclassed in Python. Brr.
This commit is contained in:
Tim Peters
parent
63af08aa93
commit
a98924a063
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@ -479,37 +479,6 @@ class TestDateOnly(unittest.TestCase):
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dt2 = dt - delta
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self.assertEqual(dt2, dt - days)
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def test_subclass_date(self):
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# XXX When datetime becomes usably subclassable, uncomment the
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# XXX "self.theclass" lines and move this into TestDate.
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# class C(self.theclass):
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class C(date):
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theAnswer = 42
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def __new__(cls, *args, **kws):
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temp = kws.copy()
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extra = temp.pop('extra')
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# result = self.theclass.__new__(cls, *args, **temp)
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result = date.__new__(cls, *args, **temp)
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result.extra = extra
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return result
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def newmeth(self, start):
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return start + self.year + self.month
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args = 2003, 4, 14
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# dt1 = self.theclass(*args)
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dt1 = date(*args)
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dt2 = C(*args, **{'extra': 7})
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self.assertEqual(dt2.__class__, C)
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self.assertEqual(dt2.theAnswer, 42)
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self.assertEqual(dt2.extra, 7)
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self.assertEqual(dt1.toordinal(), dt2.toordinal())
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self.assertEqual(dt2.newmeth(-7), dt1.year + dt1.month - 7)
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class TestDate(HarmlessMixedComparison):
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# Tests here should pass for both dates and datetimes, except for a
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# few tests that TestDateTime overrides.
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@ -1002,6 +971,32 @@ class TestDate(HarmlessMixedComparison):
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base = cls(2000, 2, 29)
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self.assertRaises(ValueError, base.replace, year=2001)
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def test_subclass_date(self):
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class C(self.theclass):
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theAnswer = 42
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def __new__(cls, *args, **kws):
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temp = kws.copy()
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extra = temp.pop('extra')
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result = self.theclass.__new__(cls, *args, **temp)
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result.extra = extra
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return result
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def newmeth(self, start):
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return start + self.year + self.month
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args = 2003, 4, 14
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dt1 = self.theclass(*args)
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dt2 = C(*args, **{'extra': 7})
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self.assertEqual(dt2.__class__, C)
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self.assertEqual(dt2.theAnswer, 42)
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self.assertEqual(dt2.extra, 7)
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self.assertEqual(dt1.toordinal(), dt2.toordinal())
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self.assertEqual(dt2.newmeth(-7), dt1.year + dt1.month - 7)
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#############################################################################
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# datetime tests
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@ -1426,6 +1421,33 @@ class TestDateTime(TestDate):
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alsobog = AlsoBogus()
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self.assertRaises(ValueError, dt.astimezone, alsobog) # also naive
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def test_subclass_datetime(self):
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class C(self.theclass):
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theAnswer = 42
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def __new__(cls, *args, **kws):
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temp = kws.copy()
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extra = temp.pop('extra')
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result = self.theclass.__new__(cls, *args, **temp)
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result.extra = extra
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return result
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def newmeth(self, start):
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return start + self.year + self.month + self.second
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args = 2003, 4, 14, 12, 13, 41
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dt1 = self.theclass(*args)
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dt2 = C(*args, **{'extra': 7})
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self.assertEqual(dt2.__class__, C)
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self.assertEqual(dt2.theAnswer, 42)
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self.assertEqual(dt2.extra, 7)
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self.assertEqual(dt1.toordinal(), dt2.toordinal())
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self.assertEqual(dt2.newmeth(-7), dt1.year + dt1.month +
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dt1.second - 7)
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class TestTime(HarmlessMixedComparison):
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theclass = time
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@ -1660,6 +1682,32 @@ class TestTime(HarmlessMixedComparison):
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self.assertRaises(ValueError, base.replace, second=100)
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self.assertRaises(ValueError, base.replace, microsecond=1000000)
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def test_subclass_time(self):
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class C(self.theclass):
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theAnswer = 42
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def __new__(cls, *args, **kws):
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temp = kws.copy()
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extra = temp.pop('extra')
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result = self.theclass.__new__(cls, *args, **temp)
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result.extra = extra
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return result
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def newmeth(self, start):
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return start + self.hour + self.second
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args = 4, 5, 6
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dt1 = self.theclass(*args)
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dt2 = C(*args, **{'extra': 7})
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self.assertEqual(dt2.__class__, C)
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self.assertEqual(dt2.theAnswer, 42)
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self.assertEqual(dt2.extra, 7)
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self.assertEqual(dt1.isoformat(), dt2.isoformat())
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self.assertEqual(dt2.newmeth(-7), dt1.hour + dt1.second - 7)
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# A mixin for classes with a tzinfo= argument. Subclasses must define
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# theclass as a class atribute, and theclass(1, 1, 1, tzinfo=whatever)
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# must be legit (which is true for time and datetime).
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@ -2042,6 +2090,32 @@ class TestTimeTZ(TestTime, TZInfoBase):
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t2 = t2.replace(tzinfo=Varies())
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self.failUnless(t1 < t2) # t1's offset counter still going up
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def test_subclass_timetz(self):
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class C(self.theclass):
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theAnswer = 42
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def __new__(cls, *args, **kws):
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temp = kws.copy()
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extra = temp.pop('extra')
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result = self.theclass.__new__(cls, *args, **temp)
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result.extra = extra
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return result
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def newmeth(self, start):
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return start + self.hour + self.second
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args = 4, 5, 6, 500, FixedOffset(-300, "EST", 1)
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dt1 = self.theclass(*args)
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dt2 = C(*args, **{'extra': 7})
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self.assertEqual(dt2.__class__, C)
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self.assertEqual(dt2.theAnswer, 42)
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self.assertEqual(dt2.extra, 7)
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self.assertEqual(dt1.utcoffset(), dt2.utcoffset())
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self.assertEqual(dt2.newmeth(-7), dt1.hour + dt1.second - 7)
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# Testing datetime objects with a non-None tzinfo.
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@ -2625,6 +2699,32 @@ class TestDateTimeTZ(TestDateTime, TZInfoBase):
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t2 = t2.replace(tzinfo=Varies())
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self.failUnless(t1 < t2) # t1's offset counter still going up
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def test_subclass_datetimetz(self):
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class C(self.theclass):
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theAnswer = 42
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def __new__(cls, *args, **kws):
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temp = kws.copy()
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extra = temp.pop('extra')
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result = self.theclass.__new__(cls, *args, **temp)
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result.extra = extra
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return result
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def newmeth(self, start):
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return start + self.hour + self.year
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args = 2002, 12, 31, 4, 5, 6, 500, FixedOffset(-300, "EST", 1)
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dt1 = self.theclass(*args)
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dt2 = C(*args, **{'extra': 7})
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self.assertEqual(dt2.__class__, C)
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self.assertEqual(dt2.theAnswer, 42)
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self.assertEqual(dt2.extra, 7)
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self.assertEqual(dt1.utcoffset(), dt2.utcoffset())
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self.assertEqual(dt2.newmeth(-7), dt1.hour + dt1.year - 7)
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# Pain to set up DST-aware tzinfo classes.
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def first_sunday_on_or_after(dt):
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@ -26,6 +26,9 @@ Core and builtins
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Extension modules
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-----------------
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- The datetime.datetime and datetime.time classes are now properly
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subclassable.
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- _tkinter.{get|set}busywaitinterval was added.
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- itertools.islice() now accepts stop=None as documented.
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@ -1235,38 +1235,42 @@ cmperror(PyObject *a, PyObject *b)
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}
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/* ---------------------------------------------------------------------------
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* Basic object allocation. These allocate Python objects of the right
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* size and type, and do the Python object-initialization bit. If there's
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* not enough memory, they return NULL after setting MemoryError. All
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* data members remain uninitialized trash.
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* Basic object allocation: tp_alloc implementatiosn. These allocate
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* Python objects of the right size and type, and do the Python object-
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* initialization bit. If there's not enough memory, they return NULL after
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* setting MemoryError. All data members remain uninitialized trash.
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*
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* We abuse the tp_alloc "nitems" argument to communicate whether a tzinfo
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* member is needed. This is ugly.
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*/
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static PyDateTime_Time *
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alloc_time(int aware)
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{
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PyDateTime_Time *self;
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self = (PyDateTime_Time *)
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static PyObject *
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time_alloc(PyTypeObject *type, int aware)
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{
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PyObject *self;
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self = (PyObject *)
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PyObject_MALLOC(aware ?
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sizeof(PyDateTime_Time) :
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sizeof(_PyDateTime_BaseTime));
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if (self == NULL)
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return (PyDateTime_Time *)PyErr_NoMemory();
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PyObject_INIT(self, &PyDateTime_TimeType);
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return (PyObject *)PyErr_NoMemory();
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PyObject_INIT(self, type);
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return self;
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}
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static PyDateTime_DateTime *
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alloc_datetime(int aware)
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static PyObject *
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datetime_alloc(PyTypeObject *type, int aware)
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{
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PyDateTime_DateTime *self;
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PyObject *self;
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self = (PyDateTime_DateTime *)
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self = (PyObject *)
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PyObject_MALLOC(aware ?
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sizeof(PyDateTime_DateTime) :
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sizeof(_PyDateTime_BaseDateTime));
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if (self == NULL)
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return (PyDateTime_DateTime *)PyErr_NoMemory();
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PyObject_INIT(self, &PyDateTime_DateTimeType);
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return (PyObject *)PyErr_NoMemory();
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PyObject_INIT(self, type);
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return self;
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}
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@ -1302,17 +1306,17 @@ new_date_ex(int year, int month, int day, PyTypeObject *type)
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}
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#define new_date(year, month, day) \
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(new_date_ex(year, month, day, &PyDateTime_DateType))
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new_date_ex(year, month, day, &PyDateTime_DateType)
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/* Create a datetime instance with no range checking. */
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static PyObject *
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new_datetime(int year, int month, int day, int hour, int minute,
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int second, int usecond, PyObject *tzinfo)
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new_datetime_ex(int year, int month, int day, int hour, int minute,
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int second, int usecond, PyObject *tzinfo, PyTypeObject *type)
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{
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PyDateTime_DateTime *self;
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char aware = tzinfo != Py_None;
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self = alloc_datetime(aware);
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self = (PyDateTime_DateTime *) (type->tp_alloc(type, aware));
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if (self != NULL) {
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self->hastzinfo = aware;
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set_date_fields((PyDateTime_Date *)self, year, month, day);
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@ -1328,14 +1332,19 @@ new_datetime(int year, int month, int day, int hour, int minute,
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return (PyObject *)self;
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}
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#define new_datetime(y, m, d, hh, mm, ss, us, tzinfo) \
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new_datetime_ex(y, m, d, hh, mm, ss, us, tzinfo, \
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&PyDateTime_DateTimeType)
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/* Create a time instance with no range checking. */
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static PyObject *
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new_time(int hour, int minute, int second, int usecond, PyObject *tzinfo)
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new_time_ex(int hour, int minute, int second, int usecond,
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PyObject *tzinfo, PyTypeObject *type)
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{
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PyDateTime_Time *self;
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char aware = tzinfo != Py_None;
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self = alloc_time(aware);
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self = (PyDateTime_Time *) (type->tp_alloc(type, aware));
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if (self != NULL) {
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self->hastzinfo = aware;
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self->hashcode = -1;
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@ -1351,6 +1360,9 @@ new_time(int hour, int minute, int second, int usecond, PyObject *tzinfo)
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return (PyObject *)self;
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}
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#define new_time(hh, mm, ss, us, tzinfo) \
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new_time_ex(hh, mm, ss, us, tzinfo, &PyDateTime_TimeType)
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/* Create a timedelta instance. Normalize the members iff normalize is
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* true. Passing false is a speed optimization, if you know for sure
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* that seconds and microseconds are already in their proper ranges. In any
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@ -3014,7 +3026,8 @@ time_new(PyTypeObject *type, PyObject *args, PyObject *kw)
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}
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}
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aware = (char)(tzinfo != Py_None);
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me = alloc_time(aware);
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me = (PyDateTime_Time *) time_alloc(&PyDateTime_TimeType,
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aware);
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if (me != NULL) {
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char *pdata = PyString_AS_STRING(state);
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@ -3036,7 +3049,8 @@ time_new(PyTypeObject *type, PyObject *args, PyObject *kw)
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return NULL;
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if (check_tzinfo_subclass(tzinfo) < 0)
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return NULL;
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self = new_time(hour, minute, second, usecond, tzinfo);
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self = new_time_ex(hour, minute, second, usecond, tzinfo,
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type);
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}
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return self;
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}
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@ -3439,7 +3453,7 @@ statichere PyTypeObject PyDateTime_TimeType = {
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0, /* tp_descr_set */
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0, /* tp_dictoffset */
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0, /* tp_init */
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0, /* tp_alloc */
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time_alloc, /* tp_alloc */
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time_new, /* tp_new */
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0, /* tp_free */
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};
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@ -3534,7 +3548,9 @@ datetime_new(PyTypeObject *type, PyObject *args, PyObject *kw)
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}
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}
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aware = (char)(tzinfo != Py_None);
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me = alloc_datetime(aware);
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me = (PyDateTime_DateTime *) datetime_alloc(
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&PyDateTime_DateTimeType,
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aware);
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if (me != NULL) {
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char *pdata = PyString_AS_STRING(state);
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@ -3558,9 +3574,9 @@ datetime_new(PyTypeObject *type, PyObject *args, PyObject *kw)
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return NULL;
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if (check_tzinfo_subclass(tzinfo) < 0)
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return NULL;
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self = new_datetime(year, month, day,
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hour, minute, second, usecond,
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tzinfo);
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self = new_datetime_ex(year, month, day,
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hour, minute, second, usecond,
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tzinfo, type);
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}
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return self;
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}
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@ -4460,7 +4476,7 @@ statichere PyTypeObject PyDateTime_DateTimeType = {
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0, /* tp_descr_set */
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0, /* tp_dictoffset */
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0, /* tp_init */
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0, /* tp_alloc */
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datetime_alloc, /* tp_alloc */
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datetime_new, /* tp_new */
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0, /* tp_free */
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};
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