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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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<section id="introduction">
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<span id="library-intro"></span><h1>概述<a class="headerlink" href="#introduction" title="永久链接至标题">¶</a></h1>
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<p>"Python 库"中包含了几种不同的组件。</p>
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<p>它包含通常被视为语言“核心”中的一部分的数据类型，例如数字和列表。对于这些类型，Python语言核心定义了文字的形式，并对它们的语义设置了一些约束，但没有完全定义语义。（另一方面，语言核心确实定义了语法属性，如操作符的拼写和优先级。）</p>
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<p>这个库也包含了内置函数和异常 --- 不需要 <a class="reference internal" href="../reference/simple_stmts.html#import"><code class="xref std std-keyword docutils literal notranslate"><span class="pre">import</span></code></a> 语句就可以在所有Python代码中使用的对象。有一些是由语言核心定义的，但是许多对于核心语义不是必需的，并且仅在这里描述。</p>
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<p>不过这个库主要是由一系列的模块组成。这些模块集可以不同方式分类。有些模块是用 C 编写并内置于 Python 解释器中；另一些模块则是用 Python 编写并以源码形式导入。有些模块提供专用于 Python 的接口，例如打印栈追踪信息；有些模块提供专用于特定操作系统的接口，例如操作特定的硬件；另一些模块则提供针对特定应用领域的接口，例如万维网。有些模块在所有更新和移植版本的 Python 中可用；另一些模块仅在底层系统支持或要求时可用；还有些模块则仅当编译和安装 Python 时选择了特定配置选项时才可用。</p>
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<p>本手册以 "从内到外" 的顺序组织：首先描述内置函数、数据类型和异常，最后是根据相关性进行分组的各种模块。</p>
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<p>这意味着如果你从头开始阅读本手册，并在感到厌烦时跳到下一章，你仍能对 Python 库的可用模块和所支持的应用领域有个大致了解。当然，你并非 <em>必须</em> 如同读小说一样从头读到尾 --- 你也可以先浏览内容目录 (在手册开头)，或在索引 (在手册末尾) 中查找某个特定函数、模块或条目。最后，如果你喜欢随意学习某个主题，你可以选择一个随机页码 (参见 <a class="reference internal" href="random.html#module-random" title="random: Generate pseudo-random numbers with various common distributions."><code class="xref py py-mod docutils literal notranslate"><span class="pre">random</span></code></a> 模块) 并读上一两小节。无论你想以怎样的顺序阅读本手册，还是建议先从 <a class="reference internal" href="functions.html#built-in-funcs"><span class="std std-ref">内置函数</span></a> 这一章开始，因为本手册的其余内容都需要你熟悉其中的基本概念。</p>
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<p>让我们开始吧！</p>
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<section id="notes-on-availability">
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<span id="availability"></span><h2>可用性注释<a class="headerlink" href="#notes-on-availability" title="永久链接至标题">¶</a></h2>
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<ul class="simple">
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<li><p>如果出现“适用：Unix”注释，意味着相应函数通常存在于 Unix 系统中。 但这并不保证其存在于某个特定的操作系统中。</p></li>
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<li><p>如果没有单独说明，所有注明 “适用：Unix” 的函数都支持基于 Unix 核心构建的 Mac OS X 系统。</p></li>
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</ul>
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</section>
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© <a href="../copyright.html">版权所有</a> 2001-2024, Python Software Foundation.
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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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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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