mirror of
https://github.com/python/cpython.git
synced 2025-11-03 03:22:27 +00:00
73 lines
2.7 KiB
ReStructuredText
73 lines
2.7 KiB
ReStructuredText
.. highlight:: c
|
|
|
|
.. _apiabiversion:
|
|
|
|
***********************
|
|
API and ABI Versioning
|
|
***********************
|
|
|
|
CPython exposes its version number in the following macros.
|
|
Note that these correspond to the version code is **built** with,
|
|
not necessarily the version used at **run time**.
|
|
|
|
See :ref:`stable` for a discussion of API and ABI stability across versions.
|
|
|
|
.. c:macro:: PY_MAJOR_VERSION
|
|
|
|
The ``3`` in ``3.4.1a2``.
|
|
|
|
.. c:macro:: PY_MINOR_VERSION
|
|
|
|
The ``4`` in ``3.4.1a2``.
|
|
|
|
.. c:macro:: PY_MICRO_VERSION
|
|
|
|
The ``1`` in ``3.4.1a2``.
|
|
|
|
.. c:macro:: PY_RELEASE_LEVEL
|
|
|
|
The ``a`` in ``3.4.1a2``.
|
|
This can be ``0xA`` for alpha, ``0xB`` for beta, ``0xC`` for release
|
|
candidate or ``0xF`` for final.
|
|
|
|
.. c:macro:: PY_RELEASE_SERIAL
|
|
|
|
The ``2`` in ``3.4.1a2``. Zero for final releases.
|
|
|
|
.. c:macro:: PY_VERSION_HEX
|
|
|
|
The Python version number encoded in a single integer.
|
|
|
|
The underlying version information can be found by treating it as a 32 bit
|
|
number in the following manner:
|
|
|
|
+-------+-------------------------+-------------------------+--------------------------+
|
|
| Bytes | Bits (big endian order) | Meaning | Value for ``3.4.1a2`` |
|
|
+=======+=========================+=========================+==========================+
|
|
| 1 | 1-8 | ``PY_MAJOR_VERSION`` | ``0x03`` |
|
|
+-------+-------------------------+-------------------------+--------------------------+
|
|
| 2 | 9-16 | ``PY_MINOR_VERSION`` | ``0x04`` |
|
|
+-------+-------------------------+-------------------------+--------------------------+
|
|
| 3 | 17-24 | ``PY_MICRO_VERSION`` | ``0x01`` |
|
|
+-------+-------------------------+-------------------------+--------------------------+
|
|
| 4 | 25-28 | ``PY_RELEASE_LEVEL`` | ``0xA`` |
|
|
+ +-------------------------+-------------------------+--------------------------+
|
|
| | 29-32 | ``PY_RELEASE_SERIAL`` | ``0x2`` |
|
|
+-------+-------------------------+-------------------------+--------------------------+
|
|
|
|
Thus ``3.4.1a2`` is hexversion ``0x030401a2`` and ``3.10.0`` is
|
|
hexversion ``0x030a00f0``.
|
|
|
|
Use this for numeric comparisons, e.g. ``#if PY_VERSION_HEX >= ...``.
|
|
|
|
This version is also available via the symbol :c:var:`Py_Version`.
|
|
|
|
.. c:var:: const unsigned long Py_Version
|
|
|
|
The Python runtime version number encoded in a single constant integer, with
|
|
the same format as the :c:macro:`PY_VERSION_HEX` macro.
|
|
This contains the Python version used at run time.
|
|
|
|
.. versionadded:: 3.11
|
|
|
|
All the given macros are defined in :source:`Include/patchlevel.h`.
|