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<li><a class="reference internal" href="#"><code class="xref py py-mod docutils literal notranslate"><span class="pre">rlcompleter</span></code> --- GNU readline 的补全函数</a><ul>
<li><a class="reference internal" href="#completer-objects">Completer 对象</a></li>
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<section id="module-rlcompleter">
<span id="rlcompleter-completion-function-for-gnu-readline"></span><h1><a class="reference internal" href="#module-rlcompleter" title="rlcompleter: Python identifier completion, suitable for the GNU readline library."><code class="xref py py-mod docutils literal notranslate"><span class="pre">rlcompleter</span></code></a> --- GNU readline 的补全函数<a class="headerlink" href="#module-rlcompleter" title="永久链接至标题"></a></h1>
<p><strong>源代码:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.8/Lib/rlcompleter.py">Lib/rlcompleter.py</a></p>
<hr class="docutils" />
<p><code class="xref py py-mod docutils literal notranslate"><span class="pre">rlcompeleter</span></code> 通过补全有效的 Python 标识符和关键字定义了一个适用于 <a class="reference internal" href="readline.html#module-readline" title="readline: GNU readline support for Python. (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">readline</span></code></a> 模块的补全函数。</p>
<p>当此模块在具有可用的 <a class="reference internal" href="readline.html#module-readline" title="readline: GNU readline support for Python. (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">readline</span></code></a> 模块的 Unix 平台被导入, 一个 <code class="xref py py-class docutils literal notranslate"><span class="pre">Completer</span></code> 实例将被自动创建并且它的 <code class="xref py py-meth docutils literal notranslate"><span class="pre">complete()</span></code> 方法将设置为 <a class="reference internal" href="readline.html#module-readline" title="readline: GNU readline support for Python. (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">readline</span></code></a> 的补全器.</p>
<p>示例:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">rlcompleter</span>
<span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">readline</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">readline</span><span class="o">.</span><span class="n">parse_and_bind</span><span class="p">(</span><span class="s2">&quot;tab: complete&quot;</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">readline</span><span class="o">.</span> <span class="o">&lt;</span><span class="n">TAB</span> <span class="n">PRESSED</span><span class="o">&gt;</span>
<span class="go">readline.__doc__ readline.get_line_buffer( readline.read_init_file(</span>
<span class="go">readline.__file__ readline.insert_text( readline.set_completer(</span>
<span class="go">readline.__name__ readline.parse_and_bind(</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">readline</span><span class="o">.</span>
</pre></div>
</div>
<p><a class="reference internal" href="#module-rlcompleter" title="rlcompleter: Python identifier completion, suitable for the GNU readline library."><code class="xref py py-mod docutils literal notranslate"><span class="pre">rlcompleter</span></code></a> 模块是为了使用 Python 的 <a class="reference internal" href="../tutorial/interpreter.html#tut-interactive"><span class="std std-ref">交互模式</span></a> 而设计的。 除非 Python 是通过 <a class="reference internal" href="../using/cmdline.html#id3"><code class="xref std std-option docutils literal notranslate"><span class="pre">-S</span></code></a> 选项运行, 这个模块总是自动地被导入且配置 (参见 <a class="reference internal" href="site.html#rlcompleter-config"><span class="std std-ref">Readline 配置</span></a>)。</p>
<p>在没有 <a class="reference internal" href="readline.html#module-readline" title="readline: GNU readline support for Python. (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">readline</span></code></a> 的平台, 此模块定义的 <code class="xref py py-class docutils literal notranslate"><span class="pre">Completer</span></code> 类仍然可以用于自定义行为.</p>
<section id="completer-objects">
<span id="id1"></span><h2>Completer 对象<a class="headerlink" href="#completer-objects" title="永久链接至标题"></a></h2>
<p>Completer 对象具有以下方法：</p>
<dl class="method">
<dt id="rlcompleter.Completer.complete">
<code class="sig-prename descclassname">Completer.</code><code class="sig-name descname">complete</code><span class="sig-paren">(</span><em class="sig-param">text</em>, <em class="sig-param">state</em><span class="sig-paren">)</span><a class="headerlink" href="#rlcompleter.Completer.complete" title="永久链接至目标"></a></dt>
<dd><p>为 <em>text</em> 返回第 <em>state</em> 项补全。</p>
<p>如果指定的 <em>text</em> 不包含句点字符 (<code class="docutils literal notranslate"><span class="pre">'.'</span></code>)，它将根据当前 <a class="reference internal" href="__main__.html#module-__main__" title="__main__: The environment where the top-level script is run."><code class="xref py py-mod docutils literal notranslate"><span class="pre">__main__</span></code></a>, <a class="reference internal" href="builtins.html#module-builtins" title="builtins: The module that provides the built-in namespace."><code class="xref py py-mod docutils literal notranslate"><span class="pre">builtins</span></code></a> 和保留关键字（定义于 <a class="reference internal" href="keyword.html#module-keyword" title="keyword: Test whether a string is a keyword in Python."><code class="xref py py-mod docutils literal notranslate"><span class="pre">keyword</span></code></a> 模块）所定义的名称进行补全。</p>
<p>如果为带有句点的名称执行调用，它将尝试尽量求值直到最后一部分为止而不产生附带影响（函数不会被求值，但它可以生成对 <a class="reference internal" href="../reference/datamodel.html#object.__getattr__" title="object.__getattr__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__getattr__()</span></code></a> 的调用），并通过 <a class="reference internal" href="functions.html#dir" title="dir"><code class="xref py py-func docutils literal notranslate"><span class="pre">dir()</span></code></a> 函数来匹配剩余部分。 在对表达式求值期间引发的任何异常都会被捕获、静默处理并返回 <a class="reference internal" href="constants.html#None" title="None"><code class="xref py py-const docutils literal notranslate"><span class="pre">None</span></code></a>。</p>
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