DateTime 物件
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Various date and time objects are supplied by the "datetime" module.
Before using any of these functions, the header file "datetime.h" must
be included in your source (note that this is not included by
"Python.h"), and the macro "PyDateTime_IMPORT" must be invoked,
usually as part of the module initialisation function.  The macro puts
a pointer to a C structure into a static variable, "PyDateTimeAPI",
that is used by the following macros.

Macro for access to the UTC singleton:

PyObject* PyDateTime_TimeZone_UTC

   Returns the time zone singleton representing UTC, the same object
   as "datetime.timezone.utc".

   3.7 版新加入.

Type-check macros:

int PyDate_Check(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DateType" or a subtype
   of "PyDateTime_DateType".  *ob* must not be *NULL*.

int PyDate_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DateType". *ob* must not
   be *NULL*.

int PyDateTime_Check(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DateTimeType" or a
   subtype of "PyDateTime_DateTimeType".  *ob* must not be *NULL*.

int PyDateTime_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DateTimeType". *ob* must
   not be *NULL*.

int PyTime_Check(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_TimeType" or a subtype
   of "PyDateTime_TimeType".  *ob* must not be *NULL*.

int PyTime_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_TimeType". *ob* must not
   be *NULL*.

int PyDelta_Check(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DeltaType" or a subtype
   of "PyDateTime_DeltaType".  *ob* must not be *NULL*.

int PyDelta_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DeltaType". *ob* must
   not be *NULL*.

int PyTZInfo_Check(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_TZInfoType" or a subtype
   of "PyDateTime_TZInfoType".  *ob* must not be *NULL*.

int PyTZInfo_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_TZInfoType". *ob* must
   not be *NULL*.

Macros to create objects:

PyObject* PyDate_FromDate(int year, int month, int day)
    *Return value: New reference.*

   Return a "datetime.date" object with the specified year, month and
   day.

PyObject* PyDateTime_FromDateAndTime(int year, int month, int day, int hour, int minute, int second, int usecond)
    *Return value: New reference.*

   Return a "datetime.datetime" object with the specified year, month,
   day, hour, minute, second and microsecond.

PyObject* PyDateTime_FromDateAndTimeAndFold(int year, int month, int day, int hour, int minute, int second, int usecond, int fold)
    *Return value: New reference.*

   Return a "datetime.datetime" object with the specified year, month,
   day, hour, minute, second, microsecond and fold.

   3.6 版新加入.

PyObject* PyTime_FromTime(int hour, int minute, int second, int usecond)
    *Return value: New reference.*

   Return a "datetime.time" object with the specified hour, minute,
   second and microsecond.

PyObject* PyTime_FromTimeAndFold(int hour, int minute, int second, int usecond, int fold)
    *Return value: New reference.*

   Return a "datetime.time" object with the specified hour, minute,
   second, microsecond and fold.

   3.6 版新加入.

PyObject* PyDelta_FromDSU(int days, int seconds, int useconds)
    *Return value: New reference.*

   Return a "datetime.timedelta" object representing the given number
   of days, seconds and microseconds.  Normalization is performed so
   that the resulting number of microseconds and seconds lie in the
   ranges documented for "datetime.timedelta" objects.

PyObject* PyTimeZone_FromOffset(PyDateTime_DeltaType* offset)
    *Return value: New reference.*

   Return a "datetime.timezone" object with an unnamed fixed offset
   represented by the *offset* argument.

   3.7 版新加入.

PyObject* PyTimeZone_FromOffsetAndName(PyDateTime_DeltaType* offset, PyUnicode* name)
    *Return value: New reference.*

   Return a "datetime.timezone" object with a fixed offset represented
   by the *offset* argument and with tzname *name*.

   3.7 版新加入.

Macros to extract fields from date objects.  The argument must be an
instance of "PyDateTime_Date", including subclasses (such as
"PyDateTime_DateTime").  The argument must not be *NULL*, and the type
is not checked:

int PyDateTime_GET_YEAR(PyDateTime_Date *o)

   回傳年份，為正整數。

int PyDateTime_GET_MONTH(PyDateTime_Date *o)

   回傳月份，為正整數，從 1 到 12。

int PyDateTime_GET_DAY(PyDateTime_Date *o)

   回傳日期，為正整數，從 1 到 31。

Macros to extract fields from datetime objects.  The argument must be
an instance of "PyDateTime_DateTime", including subclasses. The
argument must not be *NULL*, and the type is not checked:

int PyDateTime_DATE_GET_HOUR(PyDateTime_DateTime *o)

   回傳小時，為正整數，從 0 到 23。

int PyDateTime_DATE_GET_MINUTE(PyDateTime_DateTime *o)

   回傳分鐘，為正整數，從 0 到 59。

int PyDateTime_DATE_GET_SECOND(PyDateTime_DateTime *o)

   回傳秒，為正整數，從0 到59。

int PyDateTime_DATE_GET_MICROSECOND(PyDateTime_DateTime *o)

   回傳微秒，為正整數，從 0 到 999999。

Macros to extract fields from time objects.  The argument must be an
instance of "PyDateTime_Time", including subclasses. The argument must
not be *NULL*, and the type is not checked:

int PyDateTime_TIME_GET_HOUR(PyDateTime_Time *o)

   回傳小時，為正整數，從 0 到 23。

int PyDateTime_TIME_GET_MINUTE(PyDateTime_Time *o)

   回傳分鐘，為正整數，從 0 到 59。

int PyDateTime_TIME_GET_SECOND(PyDateTime_Time *o)

   回傳秒，為正整數，從0 到59。

int PyDateTime_TIME_GET_MICROSECOND(PyDateTime_Time *o)

   回傳微秒，為正整數，從 0 到 999999。

Macros to extract fields from time delta objects.  The argument must
be an instance of "PyDateTime_Delta", including subclasses. The
argument must not be *NULL*, and the type is not checked:

int PyDateTime_DELTA_GET_DAYS(PyDateTime_Delta *o)

   Return the number of days, as an int from -999999999 to 999999999.

   3.3 版新加入.

int PyDateTime_DELTA_GET_SECONDS(PyDateTime_Delta *o)

   Return the number of seconds, as an int from 0 through 86399.

   3.3 版新加入.

int PyDateTime_DELTA_GET_MICROSECONDS(PyDateTime_Delta *o)

   Return the number of microseconds, as an int from 0 through 999999.

   3.3 版新加入.

Macros for the convenience of modules implementing the DB API:

PyObject* PyDateTime_FromTimestamp(PyObject *args)
    *Return value: New reference.*

   Create and return a new "datetime.datetime" object given an
   argument tuple suitable for passing to
   "datetime.datetime.fromtimestamp()".

PyObject* PyDate_FromTimestamp(PyObject *args)
    *Return value: New reference.*

   Create and return a new "datetime.date" object given an argument
   tuple suitable for passing to "datetime.date.fromtimestamp()".
