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<section id="module-uu">
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<span id="uu-encode-and-decode-uuencode-files"></span><h1><a class="reference internal" href="#module-uu" title="uu: Encode and decode files in uuencode format."><code class="xref py py-mod docutils literal notranslate"><span class="pre">uu</span></code></a> --- 对 uuencode 文件进行编码与解码<a class="headerlink" href="#module-uu" title="永久链接至标题">¶</a></h1>
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<p><strong>源代码:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.8/Lib/uu.py">Lib/uu.py</a></p>
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<hr class="docutils" />
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<p>此模块使用 uuencode 格式来编码和解码文件，以便任意二进制数据可通过仅限 ASCII 码的连接进行传输。 在任何要求文件参数的地方，这些方法都接受文件型对象。 为了保持向下兼容，也接受包含路径名称的字符串，并且将打开相应的文件进行读写；路径名称 <code class="docutils literal notranslate"><span class="pre">'-'</span></code> 被解读为标准输入或输出。 但是，此接口已被弃用；在 Windows 中调用者最好是自行打开文件，并在需要时确保模式为 <code class="docutils literal notranslate"><span class="pre">'rb'</span></code> or <code class="docutils literal notranslate"><span class="pre">'wb'</span></code>。</p>
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<p id="index-0">此代码由 Lance Ellinghouse 贡献，并由 Jack Jansen 修改。</p>
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<p><a class="reference internal" href="#module-uu" title="uu: Encode and decode files in uuencode format."><code class="xref py py-mod docutils literal notranslate"><span class="pre">uu</span></code></a> 模块定义了以下函数：</p>
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<dl class="function">
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<dt id="uu.encode">
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<code class="sig-prename descclassname">uu.</code><code class="sig-name descname">encode</code><span class="sig-paren">(</span><em class="sig-param">in_file</em>, <em class="sig-param">out_file</em>, <em class="sig-param">name=None</em>, <em class="sig-param">mode=None</em>, <em class="sig-param">*</em>, <em class="sig-param">backtick=False</em><span class="sig-paren">)</span><a class="headerlink" href="#uu.encode" title="永久链接至目标">¶</a></dt>
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<dd><p>使用 uuencode 将 <em>in_file</em> 文件编码为 <em>out_file</em> 文件。 经过 uuencoded 编码的文件将具有指定 <em>name</em> 和 <em>mode</em> 作为解码该文件默认结果的标头。 默认值会相应地从 <em>in_file</em> 或 <code class="docutils literal notranslate"><span class="pre">'-'</span></code> 以及 <code class="docutils literal notranslate"><span class="pre">0o666</span></code> 中提取。 如果 <em>backtick</em> 为真值，零会用 <code class="docutils literal notranslate"><span class="pre">'`'</span></code> 而不是空格来表示。</p>
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<div class="versionchanged">
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<p><span class="versionmodified changed">在 3.7 版更改: </span>增加 <em>backtick</em> 形参。</p>
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</dd></dl>
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<dl class="function">
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<dt id="uu.decode">
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<code class="sig-prename descclassname">uu.</code><code class="sig-name descname">decode</code><span class="sig-paren">(</span><em class="sig-param">in_file</em>, <em class="sig-param">out_file=None</em>, <em class="sig-param">mode=None</em>, <em class="sig-param">quiet=False</em><span class="sig-paren">)</span><a class="headerlink" href="#uu.decode" title="永久链接至目标">¶</a></dt>
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<dd><p>调用此函数会解码 uuencod 编码的 <em>in_file</em> 文件并将结果放入 <em>out_file</em> 文件。 如果 <em>out_file</em> 是一个路径名称，<em>mode</em> 会在必须创建文件时用于设置权限位。 <em>out_file</em> 和 <em>mode</em> 的默认值会从 uuencode 标头中提取。 但是，如果标头中指定的文件已存在，则会引发 <a class="reference internal" href="#uu.Error" title="uu.Error"><code class="xref py py-exc docutils literal notranslate"><span class="pre">uu.Error</span></code></a>。</p>
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<p>如果输入由不正确的 uuencode 编码器生成，<a class="reference internal" href="#uu.decode" title="uu.decode"><code class="xref py py-func docutils literal notranslate"><span class="pre">decode()</span></code></a> 可能会打印一条警告到标准错误 ，这样 Python 可以从该错误中恢复。 将 <em>quiet</em> 设为真值可以屏蔽此警告。</p>
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<dt id="uu.Error">
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<em class="property">exception </em><code class="sig-prename descclassname">uu.</code><code class="sig-name descname">Error</code><a class="headerlink" href="#uu.Error" title="永久链接至目标">¶</a></dt>
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<dd><p><a class="reference internal" href="exceptions.html#Exception" title="Exception"><code class="xref py py-exc docutils literal notranslate"><span class="pre">Exception</span></code></a> 的子类，此异常可由 <a class="reference internal" href="#uu.decode" title="uu.decode"><code class="xref py py-func docutils literal notranslate"><span class="pre">uu.decode()</span></code></a> 在多种情况下引发，如上文所述，此外还包括格式错误的标头或被截断的输入文件等。</p>
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<div class="admonition seealso">
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<p class="admonition-title">参见</p>
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<dl class="simple">
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<dt>模块 <a class="reference internal" href="binascii.html#module-binascii" title="binascii: Tools for converting between binary and various ASCII-encoded binary representations."><code class="xref py py-mod docutils literal notranslate"><span class="pre">binascii</span></code></a></dt><dd><p>支持模块，包含ASCII到二进制和二进制到ASCII转换。</p>
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