DateTime Objects
****************

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.

PyDateTime_IMPORT()

   Import the datetime C API.

   On success, populate the "PyDateTimeAPI" pointer. On failure, set
   "PyDateTimeAPI" to "NULL" and set an exception. The caller must
   check if an error occurred via "PyErr_Occurred()":

      PyDateTime_IMPORT;
      if (PyErr_Occurred()) { /* cleanup */ }

   Warning:

     This is not compatible with subinterpreters.

   Changed in version 3.15: This macro is now thread safe.

type PyDateTime_CAPI

   Structure containing the fields for the datetime C API.

   The fields of this structure are private and subject to change.

   Do not use this directly; prefer "PyDateTime_*" APIs instead.

PyDateTime_CAPI *PyDateTimeAPI

   Dynamically allocated object containing the datetime C API.

   This variable is only available once "PyDateTime_IMPORT" succeeds.

   Changed in version 3.15: This variable should not be accessed
   directly as direct access is not thread-safe. Use
   "PyDateTime_IMPORT()" instead.

type PyDateTime_Date

   This subtype of "PyObject" represents a Python date object.

type PyDateTime_DateTime

   This subtype of "PyObject" represents a Python datetime object.

type PyDateTime_Time

   This subtype of "PyObject" represents a Python time object.

type PyDateTime_Delta

   This subtype of "PyObject" represents the difference between two
   datetime values.

PyTypeObject PyDateTime_DateType

   This instance of "PyTypeObject" represents the Python date type; it
   is the same object as "datetime.date" in the Python layer.

PyTypeObject PyDateTime_DateTimeType

   This instance of "PyTypeObject" represents the Python datetime
   type; it is the same object as "datetime.datetime" in the Python
   layer.

PyTypeObject PyDateTime_TimeType

   This instance of "PyTypeObject" represents the Python time type; it
   is the same object as "datetime.time" in the Python layer.

PyTypeObject PyDateTime_DeltaType

   This instance of "PyTypeObject" represents the Python type for the
   difference between two datetime values; it is the same object as
   "datetime.timedelta" in the Python layer.

PyTypeObject PyDateTime_TZInfoType

   This instance of "PyTypeObject" represents the Python time zone
   info type; it is the same object as "datetime.tzinfo" in the Python
   layer.

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".

   Added in version 3.7.

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".  This function
   always succeeds.

int PyDate_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DateType". *ob* must not
   be "NULL".  This function always succeeds.

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".
   This function always succeeds.

int PyDateTime_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DateTimeType". *ob* must
   not be "NULL".  This function always succeeds.

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".  This function
   always succeeds.

int PyTime_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_TimeType". *ob* must not
   be "NULL".  This function always succeeds.

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".  This function
   always succeeds.

int PyDelta_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_DeltaType". *ob* must
   not be "NULL".  This function always succeeds.

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".  This
   function always succeeds.

int PyTZInfo_CheckExact(PyObject *ob)

   Return true if *ob* is of type "PyDateTime_TZInfoType". *ob* must
   not be "NULL".  This function always succeeds.

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.

   Added in version 3.6.

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.

   Added in version 3.6.

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

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

   Added in version 3.7.

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

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

   Added in version 3.7.

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)

   Return the year, as a positive int.

int PyDateTime_GET_MONTH(PyDateTime_Date *o)

   Return the month, as an int from 1 through 12.

int PyDateTime_GET_DAY(PyDateTime_Date *o)

   Return the day, as an int from 1 through 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)

   Return the hour, as an int from 0 through 23.

int PyDateTime_DATE_GET_MINUTE(PyDateTime_DateTime *o)

   Return the minute, as an int from 0 through 59.

int PyDateTime_DATE_GET_SECOND(PyDateTime_DateTime *o)

   Return the second, as an int from 0 through 59.

int PyDateTime_DATE_GET_MICROSECOND(PyDateTime_DateTime *o)

   Return the microsecond, as an int from 0 through 999999.

int PyDateTime_DATE_GET_FOLD(PyDateTime_DateTime *o)

   Return the fold, as an int from 0 through 1.

   Added in version 3.6.

PyObject *PyDateTime_DATE_GET_TZINFO(PyDateTime_DateTime *o)

   Return the tzinfo (which may be "None").

   Added in version 3.10.

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)

   Return the hour, as an int from 0 through 23.

int PyDateTime_TIME_GET_MINUTE(PyDateTime_Time *o)

   Return the minute, as an int from 0 through 59.

int PyDateTime_TIME_GET_SECOND(PyDateTime_Time *o)

   Return the second, as an int from 0 through 59.

int PyDateTime_TIME_GET_MICROSECOND(PyDateTime_Time *o)

   Return the microsecond, as an int from 0 through 999999.

int PyDateTime_TIME_GET_FOLD(PyDateTime_Time *o)

   Return the fold, as an int from 0 through 1.

   Added in version 3.6.

PyObject *PyDateTime_TIME_GET_TZINFO(PyDateTime_Time *o)

   Return the tzinfo (which may be "None").

   Added in version 3.10.

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.

   Added in version 3.3.

int PyDateTime_DELTA_GET_SECONDS(PyDateTime_Delta *o)

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

   Added in version 3.3.

int PyDateTime_DELTA_GET_MICROSECONDS(PyDateTime_Delta *o)

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

   Added in version 3.3.

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()".


Internal data
*************

The following symbols are exposed by the C API but should be
considered internal-only.

PyDateTime_CAPSULE_NAME

   Name of the datetime capsule to pass to "PyCapsule_Import()".

   Internal usage only. Use "PyDateTime_IMPORT" instead.
