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<!DOCTYPE html>
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<meta charset="utf-8" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
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<title>稳定的应用程序二进制接口 — Python 3.8.20 文档</title><meta name="viewport" content="width=device-width, initial-scale=1.0">
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这个文档所针对的是一个已不再受支持的 Python 旧版本。
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你应当升级版本，并阅读
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<a href="/3/c-api/stable.html"> Python 当前稳定版本的文档</a>.
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<section id="stable-application-binary-interface">
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<span id="stable"></span><h1>稳定的应用程序二进制接口<a class="headerlink" href="#stable-application-binary-interface" title="永久链接至标题">¶</a></h1>
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<p>传统上，Python的C API将随每个版本而变化。大多数更改都与源代码兼容，通常只添加API，而不是更改现有API或删除API（尽管某些接口会首先弃用然后再删除）。</p>
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<p>不幸的是，API兼容性没有扩展到二进制兼容性（ABI）。原因主要是结构定义的演变，在这里添加新字段或更改字段类型可能不会破坏API，但可能会破坏ABI。因此，每个Python版本都需要重新编译扩展模块（即使在未使用任何受影响的接口的情况下，Unix上也可能会出现异常）。此外，在Windows上，扩展模块与特定的pythonXY.dll链接，需要重新编译才能与新的pythonXY.dll链接。</p>
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<p>从Python3.2起，已经声明了一个API的子集，以确保稳定的ABI。如果使用此API（也被称为“受限API”）的扩展模块需要定义``Py_LIMITED_API``。许多解释器细节将从扩展模块中隐藏; 反过来，在任何3.x版本（x>=2）上构建的模块都不需要重新编译</p>
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<p>在某些情况下，需要添加新函数来扩展稳定版 ABI。希望使用这些新 API 的扩展模块需要将 <code class="docutils literal notranslate"><span class="pre">Py_LIMITED_API</span></code> 设置为他们想要支持的最低 Python 版本的 <code class="docutils literal notranslate"><span class="pre">PY_VERSION_HEX</span></code> 值（例如： Python 3.3 为 <code class="docutils literal notranslate"><span class="pre">0x03030000</span></code>）（参见 <a class="reference internal" href="apiabiversion.html#apiabiversion"><span class="std std-ref">API 和 ABI 版本管理</span></a>）。此类模块将适用于所有后续 Python版本，但无法在旧版本上加载（因为缺少符号）。</p>
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<p>从Python 3.2开始，受限API可用的函数集记录在 <span class="target" id="index-2"></span><a class="pep reference external" href="https://www.python.org/dev/peps/pep-0384"><strong>PEP 384</strong></a> 。在C API文档中，不属于受限API的API元素标记为 “不属于受限API” 。</p>
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</section>
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</div>
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<div class="sphinxsidebarwrapper">
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<p class="topless"><a href="intro.html"
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title="上一章">概述</a></p>
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<h4>下一个主题</h4>
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title="下一章">极高层级 API</a></p>
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<h3>本页</h3>
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rel="nofollow">显示源代码
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</a>
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<h3>导航</h3>
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<ul>
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<li class="right" style="margin-right: 10px">
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<a href="../genindex.html" title="总目录"
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>索引</a></li>
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<li class="right" >
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<a href="../py-modindex.html" title="Python 模块索引"
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>模块</a> |</li>
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<li class="right" >
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<a href="veryhigh.html" title="极高层级 API"
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>下一页</a> |</li>
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<li><a href="https://www.python.org/">Python</a> »</li>
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<a href="../index.html">3.8.20 Documentation</a> »
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<li class="nav-item nav-item-1"><a href="index.html" >Python/C API 参考手册</a> »</li>
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<div class="footer">
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© <a href="../copyright.html">版权所有</a> 2001-2024, Python Software Foundation.
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<br />
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This page is licensed under the Python Software Foundation License Version 2.
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Examples, recipes, and other code in the documentation are additionally licensed under the Zero Clause BSD License.
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The Python Software Foundation is a non-profit corporation.
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<a href="https://www.python.org/psf/donations/">Please donate.</a>
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<br />
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最后更新于 12月 09, 2024.
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<a href="https://docs.python.org/3/bugs.html">Found a bug</a>?
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<br />
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Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 2.4.4.
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