Doc/c-api/apiabiversion.rst · source-code-analysis/python3.7.4

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c-api

apiabiversion.rst

apiabiversion.rst 2.19 KB

.. highlightlang:: c

.. _apiabiversion:

***********************
API and ABI Versioning
***********************

``PY_VERSION_HEX`` is the Python version number encoded in a single integer.

For example if the ``PY_VERSION_HEX`` is set to ``0x030401a2``, 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 |
 +=======+=========================+================================================+
 | ``1`` | ``1-8`` | ``PY_MAJOR_VERSION`` (the ``3`` in |
 | | | ``3.4.1a2``) |
 +-------+-------------------------+------------------------------------------------+
 | ``2`` | ``9-16`` | ``PY_MINOR_VERSION`` (the ``4`` in |
 | | | ``3.4.1a2``) |
 +-------+-------------------------+------------------------------------------------+
 | ``3`` | ``17-24`` | ``PY_MICRO_VERSION`` (the ``1`` in |
 | | | ``3.4.1a2``) |
 +-------+-------------------------+------------------------------------------------+
 | ``4`` | ``25-28`` | ``PY_RELEASE_LEVEL`` (``0xA`` for alpha, |
 | | | ``0xB`` for beta, ``0xC`` for release |
 | | | candidate and ``0xF`` for final), in this |
 | | | case it is alpha. |
 +-------+-------------------------+------------------------------------------------+
 | | ``29-32`` | ``PY_RELEASE_SERIAL`` (the ``2`` in |
 | | | ``3.4.1a2``, zero for final releases) |
 +-------+-------------------------+------------------------------------------------+

Thus ``3.4.1a2`` is hexversion ``0x030401a2``.

All the given macros are defined in :source:`Include/patchlevel.h`.

一键复制编辑原始数据按行查看历史

zhangweibo 提交于 2021年11月17日 13:49 +08:00 . git init

.. highlightlang:: c

API and ABI Versioning

PY_VERSION_HEX is the Python version number encoded in a single integer.

For example if the PY_VERSION_HEX is set to 0x030401a2, 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

1 1-8 PY_MAJOR_VERSION (the 3 in 3.4.1a2)

2 9-16 PY_MINOR_VERSION (the 4 in 3.4.1a2)

3 17-24 PY_MICRO_VERSION (the 1 in 3.4.1a2)

4 25-28 PY_RELEASE_LEVEL (0xA for alpha, 0xB for beta, 0xC for release candidate and 0xF for final), in this case it is alpha.

29-32 PY_RELEASE_SERIAL (the 2 in 3.4.1a2, zero for final releases)

Bytes	Bits (big endian order)	Meaning
`1`	`1-8`	`PY_MAJOR_VERSION` (the `3` in `3.4.1a2`)
`2`	`9-16`	`PY_MINOR_VERSION` (the `4` in `3.4.1a2`)
`3`	`17-24`	`PY_MICRO_VERSION` (the `1` in `3.4.1a2`)
`4`	`25-28`	`PY_RELEASE_LEVEL` (`0xA` for alpha, `0xB` for beta, `0xC` for release candidate and `0xF` for final), in this case it is alpha.
`29-32`	`PY_RELEASE_SERIAL` (the `2` in `3.4.1a2`, zero for final releases)