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bpo-30155: Add macros to get tzinfo from datetime instances (GH-21633) 

Add PyDateTime_DATE_GET_TZINFO() and PyDateTime_TIME_GET_TZINFO()
macros.
This commit is contained in:
Zackery Spytz 2020-09-23 12:43:45 -06:00 committed by GitHub
parent 9c4eac7f02
commit 2e4dd336e5
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 46 additions and 17 deletions
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11
Doc/c-api/datetime.rst
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@ -185,6 +185,11 @@ must not be ``NULL``, and the type is not checked:
Return the microsecond, as an int from 0 through 999999.
.. c:function:: PyObject* PyDateTime_DATE_GET_TZINFO(PyDateTime_DateTime *o)
Return the tzinfo (which may be ``None``).
.. versionadded:: 3.10
Macros to extract fields from time objects. The argument must be an instance of
:c:data:`PyDateTime_Time`, including subclasses. The argument must not be ``NULL``,
@ -209,6 +214,12 @@ and the type is not checked:
Return the microsecond, as an int from 0 through 999999.
.. c:function:: PyObject* PyDateTime_TIME_GET_TZINFO(PyDateTime_Time *o)
Return the tzinfo (which may be ``None``).
.. versionadded:: 3.10
Macros to extract fields from time delta objects. The argument must be an
instance of :c:data:`PyDateTime_Delta`, including subclasses. The argument must

6
Doc/whatsnew/3.10.rst
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@ -231,6 +231,12 @@ New Features
Python executable.
(Contributed by Victor Stinner in :issue:`23427`.)
* The :c:func:`PyDateTime_DATE_GET_TZINFO` and
:c:func:`PyDateTime_TIME_GET_TZINFO` macros have been added for accessing
the ``tzinfo`` attributes of :class:`datetime.datetime` and
:class:`datetime.time` objects.
(Contributed by Zackery Spytz in :issue:`30155`.)
Porting to Python 3.10
----------------------

8
Include/datetime.h
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@ -115,6 +115,10 @@ typedef struct
/* Apply for date and datetime instances. */
// o is a pointer to a time or a datetime object.
#define _PyDateTime_HAS_TZINFO(o) (((_PyDateTime_BaseTZInfo *)(o))->hastzinfo)
#define PyDateTime_GET_YEAR(o) ((((PyDateTime_Date*)o)->data[0] << 8) | \
((PyDateTime_Date*)o)->data[1])
#define PyDateTime_GET_MONTH(o) (((PyDateTime_Date*)o)->data[2])
@ -128,6 +132,8 @@ typedef struct
(((PyDateTime_DateTime*)o)->data[8] << 8) | \
((PyDateTime_DateTime*)o)->data[9])
#define PyDateTime_DATE_GET_FOLD(o) (((PyDateTime_DateTime*)o)->fold)
#define PyDateTime_DATE_GET_TZINFO(o) (_PyDateTime_HAS_TZINFO(o) ? \
((PyDateTime_DateTime *)(o))->tzinfo : Py_None)
/* Apply for time instances. */
#define PyDateTime_TIME_GET_HOUR(o) (((PyDateTime_Time*)o)->data[0])
@ -138,6 +144,8 @@ typedef struct
(((PyDateTime_Time*)o)->data[4] << 8) | \
((PyDateTime_Time*)o)->data[5])
#define PyDateTime_TIME_GET_FOLD(o) (((PyDateTime_Time*)o)->fold)
#define PyDateTime_TIME_GET_TZINFO(o) (_PyDateTime_HAS_TZINFO(o) ? \
((PyDateTime_Time *)(o))->tzinfo : Py_None)
/* Apply for time delta instances */
#define PyDateTime_DELTA_GET_DAYS(o) (((PyDateTime_Delta*)o)->days)

14
Lib/test/datetimetester.py
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@ -5991,30 +5991,36 @@ class CapiTest(unittest.TestCase):
for klass in [datetime, DateTimeSubclass]:
for args in [(1993, 8, 26, 22, 12, 55, 99999),
(1993, 8, 26, 22, 12, 55, 99999)]:
(1993, 8, 26, 22, 12, 55, 99999,
timezone.utc)]:
d = klass(*args)
with self.subTest(cls=klass, date=args):
hour, minute, second, microsecond = _testcapi.PyDateTime_DATE_GET(d)
hour, minute, second, microsecond, tzinfo = \
_testcapi.PyDateTime_DATE_GET(d)
self.assertEqual(hour, d.hour)
self.assertEqual(minute, d.minute)
self.assertEqual(second, d.second)
self.assertEqual(microsecond, d.microsecond)
self.assertIs(tzinfo, d.tzinfo)
def test_PyDateTime_TIME_GET(self):
class TimeSubclass(time):
pass
for klass in [time, TimeSubclass]:
for args in [(12, 30, 20, 10), (12, 30, 20, 10)]:
for args in [(12, 30, 20, 10),
(12, 30, 20, 10, timezone.utc)]:
d = klass(*args)
with self.subTest(cls=klass, date=args):
hour, minute, second, microsecond = _testcapi.PyDateTime_TIME_GET(d)
hour, minute, second, microsecond, tzinfo = \
_testcapi.PyDateTime_TIME_GET(d)
self.assertEqual(hour, d.hour)
self.assertEqual(minute, d.minute)
self.assertEqual(second, d.second)
self.assertEqual(microsecond, d.microsecond)
self.assertIs(tzinfo, d.tzinfo)
def test_timezones_offset_zero(self):
utc0, utc1, non_utc = _testcapi.get_timezones_offset_zero()

3
Misc/NEWS.d/next/C API/2020-07-26-19-39-45.bpo-30155.rHZRJ_.rst Normal file
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@ -0,0 +1,3 @@
Add :c:func:`PyDateTime_DATE_GET_TZINFO` and
:c:func:`PyDateTime_TIME_GET_TZINFO` macros for accessing the ``tzinfo``
attributes of :class:`datetime.datetime` and :class:`datetime.time` objects.

11
Modules/_datetimemodule.c
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@ -115,14 +115,9 @@ class datetime.IsoCalendarDate "PyDateTime_IsoCalendarDate *" "&PyDateTime_IsoCa
#define SET_TD_SECONDS(o, v) ((o)->seconds = (v))
#define SET_TD_MICROSECONDS(o, v) ((o)->microseconds = (v))
/* p is a pointer to a time or a datetime object; HASTZINFO(p) returns
* p->hastzinfo.
*/
#define HASTZINFO(p) (((_PyDateTime_BaseTZInfo *)(p))->hastzinfo)
#define GET_TIME_TZINFO(p) (HASTZINFO(p) ? \
((PyDateTime_Time *)(p))->tzinfo : Py_None)
#define GET_DT_TZINFO(p) (HASTZINFO(p) ? \
((PyDateTime_DateTime *)(p))->tzinfo : Py_None)
#define HASTZINFO _PyDateTime_HAS_TZINFO
#define GET_TIME_TZINFO PyDateTime_TIME_GET_TZINFO
#define GET_DT_TZINFO PyDateTime_DATE_GET_TZINFO
/* M is a char or int claiming to be a valid month. The macro is equivalent
* to the two-sided Python test
* 1 <= M <= 12

6
Modules/_testcapimodule.c
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@ -2677,8 +2677,9 @@ test_PyDateTime_DATE_GET(PyObject *self, PyObject *obj)
minute = PyDateTime_DATE_GET_MINUTE(obj);
second = PyDateTime_DATE_GET_SECOND(obj);
microsecond = PyDateTime_DATE_GET_MICROSECOND(obj);
PyObject *tzinfo = PyDateTime_DATE_GET_TZINFO(obj);
return Py_BuildValue("(llll)", hour, minute, second, microsecond);
return Py_BuildValue("(llllO)", hour, minute, second, microsecond, tzinfo);
}
static PyObject *
@ -2690,8 +2691,9 @@ test_PyDateTime_TIME_GET(PyObject *self, PyObject *obj)
minute = PyDateTime_TIME_GET_MINUTE(obj);
second = PyDateTime_TIME_GET_SECOND(obj);
microsecond = PyDateTime_TIME_GET_MICROSECOND(obj);
PyObject *tzinfo = PyDateTime_TIME_GET_TZINFO(obj);
return Py_BuildValue("(llll)", hour, minute, second, microsecond);
return Py_BuildValue("(llllO)", hour, minute, second, microsecond, tzinfo);
}
static PyObject *

4
Modules/_zoneinfo.c
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@ -484,9 +484,7 @@ zoneinfo_tzname(PyObject *self, PyObject *dt)
return tti->tzname;
}
#define HASTZINFO(p) (((_PyDateTime_BaseTZInfo *)(p))->hastzinfo)
#define GET_DT_TZINFO(p) \
(HASTZINFO(p) ? ((PyDateTime_DateTime *)(p))->tzinfo : Py_None)
#define GET_DT_TZINFO PyDateTime_DATE_GET_TZINFO
static PyObject *
zoneinfo_fromutc(PyObject *obj_self, PyObject *dt)