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<section id="module-uuid">
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<span id="uuid-uuid-objects-according-to-rfc-4122"></span><h1><a class="reference internal" href="#module-uuid" title="uuid: UUID objects (universally unique identifiers) according to RFC 4122"><code class="xref py py-mod docutils literal notranslate"><span class="pre">uuid</span></code></a> --- <span class="target" id="index-12"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc4122.html"><strong>RFC 4122</strong></a> 定义的UUID对象<a class="headerlink" href="#module-uuid" title="永久链接至标题">¶</a></h1>
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<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.8/Lib/uuid.py">Lib/uuid.py</a></p>
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<p>这个模块提供了不可变的 <a class="reference internal" href="#uuid.UUID" title="uuid.UUID"><code class="xref py py-class docutils literal notranslate"><span class="pre">UUID</span></code></a> 对象 (<a class="reference internal" href="#uuid.UUID" title="uuid.UUID"><code class="xref py py-class docutils literal notranslate"><span class="pre">UUID</span></code></a> 类) 和 <a class="reference internal" href="#uuid.uuid1" title="uuid.uuid1"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid1()</span></code></a>, <a class="reference internal" href="#uuid.uuid3" title="uuid.uuid3"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid3()</span></code></a>, <a class="reference internal" href="#uuid.uuid4" title="uuid.uuid4"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid4()</span></code></a>, <a class="reference internal" href="#uuid.uuid5" title="uuid.uuid5"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid5()</span></code></a> 等函数用于生成 <span class="target" id="index-19"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc4122.html"><strong>RFC 4122</strong></a> 所定义的第 1, 3, 4 和 5 版 UUID。</p>
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<p>如果你想要的只是一个唯一的ID，你可能应该调用 <a class="reference internal" href="#uuid.uuid1" title="uuid.uuid1"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid1()</span></code></a> 或 <a class="reference internal" href="#uuid.uuid4" title="uuid.uuid4"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid4()</span></code></a>。 注意 <a class="reference internal" href="#uuid.uuid1" title="uuid.uuid1"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid1()</span></code></a> 可能会损害隐私，因为它创建了一个包含计算机网络地址的UUID。 <a class="reference internal" href="#uuid.uuid4" title="uuid.uuid4"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid4()</span></code></a> 可以创建一个随机UUID。</p>
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<p>根据底层平台的支持，<a class="reference internal" href="#uuid.uuid1" title="uuid.uuid1"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid1()</span></code></a> 可能会也可能不会返回一个 "安全的" UUID。 安全的 UUID 是使用同步方法生成的，确保没有两个进程可以获得相同的 UUID。 所有 <a class="reference internal" href="#uuid.UUID" title="uuid.UUID"><code class="xref py py-class docutils literal notranslate"><span class="pre">UUID</span></code></a> 的实例都有一个 <code class="xref py py-attr docutils literal notranslate"><span class="pre">is_safe</span></code> 属性，使用这个枚举来传递关于 UUID 安全的任何信息:</p>
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<dl class="class">
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<dt id="uuid.SafeUUID">
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<em class="property">class </em><code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">SafeUUID</code><a class="headerlink" href="#uuid.SafeUUID" title="永久链接至目标">¶</a></dt>
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<dd><div class="versionadded">
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<p><span class="versionmodified added">3.7 新版功能.</span></p>
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</div>
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<dl class="attribute">
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<dt id="uuid.SafeUUID.safe">
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<code class="sig-name descname">safe</code><a class="headerlink" href="#uuid.SafeUUID.safe" title="永久链接至目标">¶</a></dt>
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<dd><p>该UUID是由平台以多进程安全的方式生成的。</p>
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</dd></dl>
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<dl class="attribute">
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<dt id="uuid.SafeUUID.unsafe">
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<code class="sig-name descname">unsafe</code><a class="headerlink" href="#uuid.SafeUUID.unsafe" title="永久链接至目标">¶</a></dt>
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<dd><p>UUID不是以多进程安全的方式生成的。</p>
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</dd></dl>
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<dl class="attribute">
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<dt id="uuid.SafeUUID.unknown">
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<code class="sig-name descname">unknown</code><a class="headerlink" href="#uuid.SafeUUID.unknown" title="永久链接至目标">¶</a></dt>
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<dd><p>该平台不提供UUID是否安全生成的信息。</p>
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</dd></dl>
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</dd></dl>
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<dl class="class">
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<dt id="uuid.UUID">
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<em class="property">class </em><code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">UUID</code><span class="sig-paren">(</span><em class="sig-param">hex=None</em>, <em class="sig-param">bytes=None</em>, <em class="sig-param">bytes_le=None</em>, <em class="sig-param">fields=None</em>, <em class="sig-param">int=None</em>, <em class="sig-param">version=None</em>, <em class="sig-param">*</em>, <em class="sig-param">is_safe=SafeUUID.unknown</em><span class="sig-paren">)</span><a class="headerlink" href="#uuid.UUID" title="永久链接至目标">¶</a></dt>
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<dd><p>用一串32位十六进制数字、一串大端序16个字节作为*bytes*参数、一串16个小端序字节作为*bytes_le*参数、一个由六个整数组成的元组（32位*time_low*，16位*time_mid*，16位*time_hi_version*，8位*clock_seq_hi_variant*，8位*clock_seq_low*，48位*node*）作为*fields*参数，或者一个128位整数作为*int*参数创建一个UUID。当给出一串十六进制数字时，大括号、连字符和URN前缀都是可选的。 例如，这些表达式都产生相同的UUID:</p>
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<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="n">UUID</span><span class="p">(</span><span class="s1">'{12345678-1234-5678-1234-567812345678}'</span><span class="p">)</span>
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<span class="n">UUID</span><span class="p">(</span><span class="s1">'12345678123456781234567812345678'</span><span class="p">)</span>
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<span class="n">UUID</span><span class="p">(</span><span class="s1">'urn:uuid:12345678-1234-5678-1234-567812345678'</span><span class="p">)</span>
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<span class="n">UUID</span><span class="p">(</span><span class="nb">bytes</span><span class="o">=</span><span class="sa">b</span><span class="s1">'</span><span class="se">\x12\x34\x56\x78</span><span class="s1">'</span><span class="o">*</span><span class="mi">4</span><span class="p">)</span>
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<span class="n">UUID</span><span class="p">(</span><span class="n">bytes_le</span><span class="o">=</span><span class="sa">b</span><span class="s1">'</span><span class="se">\x78\x56\x34\x12\x34\x12\x78\x56</span><span class="s1">'</span> <span class="o">+</span>
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<span class="sa">b</span><span class="s1">'</span><span class="se">\x12\x34\x56\x78\x12\x34\x56\x78</span><span class="s1">'</span><span class="p">)</span>
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<span class="n">UUID</span><span class="p">(</span><span class="n">fields</span><span class="o">=</span><span class="p">(</span><span class="mh">0x12345678</span><span class="p">,</span> <span class="mh">0x1234</span><span class="p">,</span> <span class="mh">0x5678</span><span class="p">,</span> <span class="mh">0x12</span><span class="p">,</span> <span class="mh">0x34</span><span class="p">,</span> <span class="mh">0x567812345678</span><span class="p">))</span>
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<span class="n">UUID</span><span class="p">(</span><span class="nb">int</span><span class="o">=</span><span class="mh">0x12345678123456781234567812345678</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>必须给出 <em>hex</em>、<em>bytes</em>、<em>bytes_le</em>、<em>fields</em> 或 <em>int</em> 中的唯一一个。 <em>version</em> 参数是可选的；如果给定，产生的UUID将根据 <span class="target" id="index-20"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc4122.html"><strong>RFC 4122</strong></a> 设置其变体和版本号，覆盖给定的 <em>hex</em>、<em>bytes</em>、<em>bytes_le</em>、<em>fields</em> 或 <em>int</em> 中的位。</p>
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<p>UUID 对象的比较是通过比较它们的 <a class="reference internal" href="#uuid.UUID.int" title="uuid.UUID.int"><code class="xref py py-attr docutils literal notranslate"><span class="pre">UUID.int</span></code></a> 属性进行的。 与非 UUID 对象的比较会引发 <a class="reference internal" href="exceptions.html#TypeError" title="TypeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TypeError</span></code></a>。</p>
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<p><code class="docutils literal notranslate"><span class="pre">str(uuid)</span></code> 返回一个 <code class="docutils literal notranslate"><span class="pre">12345678-1234-5678-1234-567812345678</span></code> 形式的字符串，其中 32 位十六进制数字代表 UUID。</p>
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</dd></dl>
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<p><a class="reference internal" href="#uuid.UUID" title="uuid.UUID"><code class="xref py py-class docutils literal notranslate"><span class="pre">UUID</span></code></a> 实例有这些只读的属性:</p>
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<dl class="attribute">
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<dt id="uuid.UUID.bytes">
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<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">bytes</code><a class="headerlink" href="#uuid.UUID.bytes" title="永久链接至目标">¶</a></dt>
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<dd><p>UUID 是一个 16 字节的字符串（包含 6 个整数字段，大端字节顺序）。</p>
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</dd></dl>
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<dl class="attribute">
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<dt id="uuid.UUID.bytes_le">
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<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">bytes_le</code><a class="headerlink" href="#uuid.UUID.bytes_le" title="永久链接至目标">¶</a></dt>
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<dd><p>UUID 是一个 16 字节的字符串（其中 <em>time_low</em>、<em>time_mid</em> 和 <em>time_hi_version</em> 为小端字节顺序）。</p>
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</dd></dl>
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<dl class="attribute">
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<dt id="uuid.UUID.fields">
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<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">fields</code><a class="headerlink" href="#uuid.UUID.fields" title="永久链接至目标">¶</a></dt>
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<dd><p>以元组形式存放的UUID的6个整数域，有六个单独的属性和两个派生属性：</p>
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<table class="docutils align-default">
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<colgroup>
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<col style="width: 49%" />
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<col style="width: 51%" />
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</colgroup>
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<thead>
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<tr class="row-odd"><th class="head"><p>域</p></th>
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<th class="head"><p>含义</p></th>
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</tr>
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</thead>
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<tbody>
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<tr class="row-even"><td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">time_low</span></code></p></td>
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<td><p>UUID的前32位</p></td>
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</tr>
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<tr class="row-odd"><td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">time_mid</span></code></p></td>
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<td><p>接前一域的16位</p></td>
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</tr>
|
||
<tr class="row-even"><td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">time_hi_version</span></code></p></td>
|
||
<td><p>接前一域的16位</p></td>
|
||
</tr>
|
||
<tr class="row-odd"><td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">clock_seq_hi_variant</span></code></p></td>
|
||
<td><p>接前一域的8位</p></td>
|
||
</tr>
|
||
<tr class="row-even"><td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">clock_seq_low</span></code></p></td>
|
||
<td><p>接前一域的8位</p></td>
|
||
</tr>
|
||
<tr class="row-odd"><td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">node</span></code></p></td>
|
||
<td><p>UUID的最后48位</p></td>
|
||
</tr>
|
||
<tr class="row-even"><td><p><a class="reference internal" href="time.html#module-time" title="time: Time access and conversions."><code class="xref py py-attr docutils literal notranslate"><span class="pre">time</span></code></a></p></td>
|
||
<td><p>UUID的总长60位的时间戳</p></td>
|
||
</tr>
|
||
<tr class="row-odd"><td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">clock_seq</span></code></p></td>
|
||
<td><p>14位的序列号</p></td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</dd></dl>
|
||
|
||
<dl class="attribute">
|
||
<dt id="uuid.UUID.hex">
|
||
<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">hex</code><a class="headerlink" href="#uuid.UUID.hex" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>UUID是一个32个字符的十六进制字符串。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="attribute">
|
||
<dt id="uuid.UUID.int">
|
||
<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">int</code><a class="headerlink" href="#uuid.UUID.int" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>UUID是一个128位的整数。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="attribute">
|
||
<dt id="uuid.UUID.urn">
|
||
<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">urn</code><a class="headerlink" href="#uuid.UUID.urn" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>在 <span class="target" id="index-21"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc4122.html"><strong>RFC 4122</strong></a> 中定义的 URN 形式的 UUID。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="attribute">
|
||
<dt id="uuid.UUID.variant">
|
||
<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">variant</code><a class="headerlink" href="#uuid.UUID.variant" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>UUID 的变体，它决定了 UUID 的内部布局。 这将是 <a class="reference internal" href="#uuid.RESERVED_NCS" title="uuid.RESERVED_NCS"><code class="xref py py-const docutils literal notranslate"><span class="pre">RESERVED_NCS</span></code></a>, <a class="reference internal" href="#uuid.RFC_4122" title="uuid.RFC_4122"><code class="xref py py-const docutils literal notranslate"><span class="pre">RFC_4122</span></code></a>, <a class="reference internal" href="#uuid.RESERVED_MICROSOFT" title="uuid.RESERVED_MICROSOFT"><code class="xref py py-const docutils literal notranslate"><span class="pre">RESERVED_MICROSOFT</span></code></a> 或 <a class="reference internal" href="#uuid.RESERVED_FUTURE" title="uuid.RESERVED_FUTURE"><code class="xref py py-const docutils literal notranslate"><span class="pre">RESERVED_FUTURE</span></code></a> 中的一个。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="attribute">
|
||
<dt id="uuid.UUID.version">
|
||
<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">version</code><a class="headerlink" href="#uuid.UUID.version" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>UUID 版本号（1 到 5，只有当变体为 <a class="reference internal" href="#uuid.RFC_4122" title="uuid.RFC_4122"><code class="xref py py-const docutils literal notranslate"><span class="pre">RFC_4122</span></code></a> 时才有意义）。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="attribute">
|
||
<dt id="uuid.UUID.is_safe">
|
||
<code class="sig-prename descclassname">UUID.</code><code class="sig-name descname">is_safe</code><a class="headerlink" href="#uuid.UUID.is_safe" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>一个 <a class="reference internal" href="#uuid.SafeUUID" title="uuid.SafeUUID"><code class="xref py py-class docutils literal notranslate"><span class="pre">SafeUUID</span></code></a> 的枚举，表示平台是否以多进程安全的方式生成 UUID。</p>
|
||
<div class="versionadded">
|
||
<p><span class="versionmodified added">3.7 新版功能.</span></p>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
<p><a class="reference internal" href="#module-uuid" title="uuid: UUID objects (universally unique identifiers) according to RFC 4122"><code class="xref py py-mod docutils literal notranslate"><span class="pre">uuid</span></code></a> 模块定义了以下函数：</p>
|
||
<dl class="function">
|
||
<dt id="uuid.getnode">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">getnode</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#uuid.getnode" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>获取 48 位正整数形式的硬件地址。 第一次运行时，它可能会启动一个单独的程序，这可能会相当慢。 如果所有获取硬件地址的尝试都失败了，我们会按照 <span class="target" id="index-22"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc4122.html"><strong>RFC 4122</strong></a> 中的建议，选择一个随机的 48 位数字，其多播位 (第一个八进制数的最小有效位) 设置为 1。 “硬件地址”是指一个网络接口的 MAC 地址。 在一台有多个网络接口的机器上，普遍管理的 MAC 地址 (即第一个八位数的第二个最小有效位是 <em>未设置的</em>) 将比本地管理的 MAC 地址优先，但没有其他排序保证。</p>
|
||
<div class="versionchanged">
|
||
<p><span class="versionmodified changed">在 3.7 版更改: </span>普遍管理的MAC地址优于本地管理的MAC地址，因为前者保证是全球唯一的，而后者则不是。</p>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
<span class="target" id="index-5"></span><dl class="function">
|
||
<dt id="uuid.uuid1">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">uuid1</code><span class="sig-paren">(</span><em class="sig-param">node=None</em>, <em class="sig-param">clock_seq=None</em><span class="sig-paren">)</span><a class="headerlink" href="#uuid.uuid1" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>根据主机 ID、序列号和当前时间生成一个 UUID。 如果没有给出 <em>node</em>，则使用 <a class="reference internal" href="#uuid.getnode" title="uuid.getnode"><code class="xref py py-func docutils literal notranslate"><span class="pre">getnode()</span></code></a> 来获取硬件地址。 如果给出了 <em>clock_seq</em>，它将被用作序列号；否则将选择一个随机的 14 比特位序列号。</p>
|
||
</dd></dl>
|
||
|
||
<span class="target" id="index-6"></span><dl class="function">
|
||
<dt id="uuid.uuid3">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">uuid3</code><span class="sig-paren">(</span><em class="sig-param">namespace</em>, <em class="sig-param">name</em><span class="sig-paren">)</span><a class="headerlink" href="#uuid.uuid3" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>根据命名空间标识符（这是一个UUID）和名称（这是一个字符串）的MD5哈希值，生成一个UUID。</p>
|
||
</dd></dl>
|
||
|
||
<span class="target" id="index-7"></span><dl class="function">
|
||
<dt id="uuid.uuid4">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">uuid4</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#uuid.uuid4" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>生成一个随机的UUID。</p>
|
||
</dd></dl>
|
||
|
||
<span class="target" id="index-8"></span><dl class="function">
|
||
<dt id="uuid.uuid5">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">uuid5</code><span class="sig-paren">(</span><em class="sig-param">namespace</em>, <em class="sig-param">name</em><span class="sig-paren">)</span><a class="headerlink" href="#uuid.uuid5" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>根据命名空间标识符（这是一个UUID）和名称（这是一个字符串）的SHA-1哈希值生成一个UUID。</p>
|
||
</dd></dl>
|
||
|
||
<p id="index-9"><a class="reference internal" href="#module-uuid" title="uuid: UUID objects (universally unique identifiers) according to RFC 4122"><code class="xref py py-mod docutils literal notranslate"><span class="pre">uuid</span></code></a> 模块定义了以下命名空间标识符，供 <a class="reference internal" href="#uuid.uuid3" title="uuid.uuid3"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid3()</span></code></a> 或 <a class="reference internal" href="#uuid.uuid5" title="uuid.uuid5"><code class="xref py py-func docutils literal notranslate"><span class="pre">uuid5()</span></code></a> 使用。</p>
|
||
<dl class="data">
|
||
<dt id="uuid.NAMESPACE_DNS">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">NAMESPACE_DNS</code><a class="headerlink" href="#uuid.NAMESPACE_DNS" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>当指定这个命名空间时，<em>name</em> 字符串是一个完全限定的域名。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="data">
|
||
<dt id="uuid.NAMESPACE_URL">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">NAMESPACE_URL</code><a class="headerlink" href="#uuid.NAMESPACE_URL" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>当指定这个命名空间时，<em>name</em> 字符串是一个URL。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="data">
|
||
<dt id="uuid.NAMESPACE_OID">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">NAMESPACE_OID</code><a class="headerlink" href="#uuid.NAMESPACE_OID" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>当指定这个命名空间时，<em>name</em> 字符串是一个 ISO OID。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="data">
|
||
<dt id="uuid.NAMESPACE_X500">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">NAMESPACE_X500</code><a class="headerlink" href="#uuid.NAMESPACE_X500" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>当指定这个命名空间时，<em>name</em> 字符串是 DER 或文本输出格式的 X.500 DN。</p>
|
||
</dd></dl>
|
||
|
||
<p><a class="reference internal" href="#module-uuid" title="uuid: UUID objects (universally unique identifiers) according to RFC 4122"><code class="xref py py-mod docutils literal notranslate"><span class="pre">uuid</span></code></a> 模块为 <code class="xref py py-attr docutils literal notranslate"><span class="pre">variant</span></code> 属性的可能值定义了以下常量:</p>
|
||
<dl class="data">
|
||
<dt id="uuid.RESERVED_NCS">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">RESERVED_NCS</code><a class="headerlink" href="#uuid.RESERVED_NCS" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>为NCS兼容性保留。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="data">
|
||
<dt id="uuid.RFC_4122">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">RFC_4122</code><a class="headerlink" href="#uuid.RFC_4122" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>指定 <span class="target" id="index-23"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc4122.html"><strong>RFC 4122</strong></a> 中给出的 UUID 布局。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="data">
|
||
<dt id="uuid.RESERVED_MICROSOFT">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">RESERVED_MICROSOFT</code><a class="headerlink" href="#uuid.RESERVED_MICROSOFT" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>为微软的兼容性保留。</p>
|
||
</dd></dl>
|
||
|
||
<dl class="data">
|
||
<dt id="uuid.RESERVED_FUTURE">
|
||
<code class="sig-prename descclassname">uuid.</code><code class="sig-name descname">RESERVED_FUTURE</code><a class="headerlink" href="#uuid.RESERVED_FUTURE" title="永久链接至目标">¶</a></dt>
|
||
<dd><p>保留给未来的定义。</p>
|
||
</dd></dl>
|
||
|
||
<div class="admonition seealso">
|
||
<p class="admonition-title">参见</p>
|
||
<dl class="simple">
|
||
<dt><span class="target" id="index-24"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc4122.html"><strong>RFC 4122</strong></a> - 通用唯一标识符（UUID）URN命名空间</dt><dd><p>本规范定义了UUID的统一资源名称空间，UUID的内部格式，以及生成UUID的方法。</p>
|
||
</dd>
|
||
</dl>
|
||
</div>
|
||
<section id="example">
|
||
<span id="uuid-example"></span><h2>示例<a class="headerlink" href="#example" title="永久链接至标题">¶</a></h2>
|
||
<p>下面是一些 <a class="reference internal" href="#module-uuid" title="uuid: UUID objects (universally unique identifiers) according to RFC 4122"><code class="xref py py-mod docutils literal notranslate"><span class="pre">uuid</span></code></a> 模块的典型使用例子:</p>
|
||
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">uuid</span>
|
||
|
||
<span class="gp">>>> </span><span class="c1"># make a UUID based on the host ID and current time</span>
|
||
<span class="gp">>>> </span><span class="n">uuid</span><span class="o">.</span><span class="n">uuid1</span><span class="p">()</span>
|
||
<span class="go">UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')</span>
|
||
|
||
<span class="gp">>>> </span><span class="c1"># make a UUID using an MD5 hash of a namespace UUID and a name</span>
|
||
<span class="gp">>>> </span><span class="n">uuid</span><span class="o">.</span><span class="n">uuid3</span><span class="p">(</span><span class="n">uuid</span><span class="o">.</span><span class="n">NAMESPACE_DNS</span><span class="p">,</span> <span class="s1">'python.org'</span><span class="p">)</span>
|
||
<span class="go">UUID('6fa459ea-ee8a-3ca4-894e-db77e160355e')</span>
|
||
|
||
<span class="gp">>>> </span><span class="c1"># make a random UUID</span>
|
||
<span class="gp">>>> </span><span class="n">uuid</span><span class="o">.</span><span class="n">uuid4</span><span class="p">()</span>
|
||
<span class="go">UUID('16fd2706-8baf-433b-82eb-8c7fada847da')</span>
|
||
|
||
<span class="gp">>>> </span><span class="c1"># make a UUID using a SHA-1 hash of a namespace UUID and a name</span>
|
||
<span class="gp">>>> </span><span class="n">uuid</span><span class="o">.</span><span class="n">uuid5</span><span class="p">(</span><span class="n">uuid</span><span class="o">.</span><span class="n">NAMESPACE_DNS</span><span class="p">,</span> <span class="s1">'python.org'</span><span class="p">)</span>
|
||
<span class="go">UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')</span>
|
||
|
||
<span class="gp">>>> </span><span class="c1"># make a UUID from a string of hex digits (braces and hyphens ignored)</span>
|
||
<span class="gp">>>> </span><span class="n">x</span> <span class="o">=</span> <span class="n">uuid</span><span class="o">.</span><span class="n">UUID</span><span class="p">(</span><span class="s1">'{00010203-0405-0607-0809-0a0b0c0d0e0f}'</span><span class="p">)</span>
|
||
|
||
<span class="gp">>>> </span><span class="c1"># convert a UUID to a string of hex digits in standard form</span>
|
||
<span class="gp">>>> </span><span class="nb">str</span><span class="p">(</span><span class="n">x</span><span class="p">)</span>
|
||
<span class="go">'00010203-0405-0607-0809-0a0b0c0d0e0f'</span>
|
||
|
||
<span class="gp">>>> </span><span class="c1"># get the raw 16 bytes of the UUID</span>
|
||
<span class="gp">>>> </span><span class="n">x</span><span class="o">.</span><span class="n">bytes</span>
|
||
<span class="go">b'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'</span>
|
||
|
||
<span class="gp">>>> </span><span class="c1"># make a UUID from a 16-byte string</span>
|
||
<span class="gp">>>> </span><span class="n">uuid</span><span class="o">.</span><span class="n">UUID</span><span class="p">(</span><span class="nb">bytes</span><span class="o">=</span><span class="n">x</span><span class="o">.</span><span class="n">bytes</span><span class="p">)</span>
|
||
<span class="go">UUID('00010203-0405-0607-0809-0a0b0c0d0e0f')</span>
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
</section>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
|
||
<div class="sphinxsidebarwrapper">
|
||
<h3><a href="../contents.html">目录</a></h3>
|
||
<ul>
|
||
<li><a class="reference internal" href="#"><code class="xref py py-mod docutils literal notranslate"><span class="pre">uuid</span></code> --- <strong>RFC 4122</strong> 定义的UUID对象</a><ul>
|
||
<li><a class="reference internal" href="#example">示例</a></li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
|
||
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|
||
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||
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||
<h4>下一个主题</h4>
|
||
<p class="topless"><a href="socketserver.html"
|
||
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|
||
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|
||
<h3>本页</h3>
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||
<li><a href="../bugs.html">报告 Bug</a></li>
|
||
<li>
|
||
<a href="https://github.com/python/cpython/blob/3.8/Doc/library/uuid.rst"
|
||
rel="nofollow">显示源代码
|
||
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|
||
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|
||
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|
||
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|
||
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