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  <div class="section" id="module-dircache">
<span id="dircache-cached-directory-listings"></span><h1>10.11. <a class="reference internal" href="#module-dircache" title="dircache: Return directory listing, with cache mechanism. (deprecated)"><tt class="xref py py-mod docutils literal"><span class="pre">dircache</span></tt></a> &#8212; Cached directory listings<a class="headerlink" href="#module-dircache" title="Permalink to this headline">¶</a></h1>
<p class="deprecated">
<span class="versionmodified">Deprecated since version 2.6: </span>The <a class="reference internal" href="#module-dircache" title="dircache: Return directory listing, with cache mechanism. (deprecated)"><tt class="xref py py-mod docutils literal"><span class="pre">dircache</span></tt></a> module has been removed in Python 3.</p>
<p>The <a class="reference internal" href="#module-dircache" title="dircache: Return directory listing, with cache mechanism. (deprecated)"><tt class="xref py py-mod docutils literal"><span class="pre">dircache</span></tt></a> module defines a function for reading directory listing
using a cache, and cache invalidation using the <em>mtime</em> of the directory.
Additionally, it defines a function to annotate directories by appending a
slash.</p>
<p>The <a class="reference internal" href="#module-dircache" title="dircache: Return directory listing, with cache mechanism. (deprecated)"><tt class="xref py py-mod docutils literal"><span class="pre">dircache</span></tt></a> module defines the following functions:</p>
<dl class="function">
<dt id="dircache.reset">
<tt class="descclassname">dircache.</tt><tt class="descname">reset</tt><big>(</big><big>)</big><a class="headerlink" href="#dircache.reset" title="Permalink to this definition">¶</a></dt>
<dd><p>Resets the directory cache.</p>
</dd></dl>

<dl class="function">
<dt id="dircache.listdir">
<tt class="descclassname">dircache.</tt><tt class="descname">listdir</tt><big>(</big><em>path</em><big>)</big><a class="headerlink" href="#dircache.listdir" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a directory listing of <em>path</em>, as gotten from <a class="reference internal" href="os.html#os.listdir" title="os.listdir"><tt class="xref py py-func docutils literal"><span class="pre">os.listdir()</span></tt></a>. Note
that unless <em>path</em> changes, further call to <a class="reference internal" href="#dircache.listdir" title="dircache.listdir"><tt class="xref py py-func docutils literal"><span class="pre">listdir()</span></tt></a> will not re-read the
directory structure.</p>
<p>Note that the list returned should be regarded as read-only. (Perhaps a future
version should change it to return a tuple?)</p>
</dd></dl>

<dl class="function">
<dt id="dircache.opendir">
<tt class="descclassname">dircache.</tt><tt class="descname">opendir</tt><big>(</big><em>path</em><big>)</big><a class="headerlink" href="#dircache.opendir" title="Permalink to this definition">¶</a></dt>
<dd><p>Same as <a class="reference internal" href="#dircache.listdir" title="dircache.listdir"><tt class="xref py py-func docutils literal"><span class="pre">listdir()</span></tt></a>. Defined for backwards compatibility.</p>
</dd></dl>

<dl class="function">
<dt id="dircache.annotate">
<tt class="descclassname">dircache.</tt><tt class="descname">annotate</tt><big>(</big><em>head</em>, <em>list</em><big>)</big><a class="headerlink" href="#dircache.annotate" title="Permalink to this definition">¶</a></dt>
<dd><p>Assume <em>list</em> is a list of paths relative to <em>head</em>, and append, in place, a
<tt class="docutils literal"><span class="pre">'/'</span></tt> to each path which points to a directory.</p>
</dd></dl>

<div class="highlight-python"><div class="highlight"><pre><span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">dircache</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">a</span> <span class="o">=</span> <span class="n">dircache</span><span class="o">.</span><span class="n">listdir</span><span class="p">(</span><span class="s">&#39;/&#39;</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">a</span> <span class="o">=</span> <span class="n">a</span><span class="p">[:]</span> <span class="c"># Copy the return value so we can change &#39;a&#39;</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">a</span>
<span class="go">[&#39;bin&#39;, &#39;boot&#39;, &#39;cdrom&#39;, &#39;dev&#39;, &#39;etc&#39;, &#39;floppy&#39;, &#39;home&#39;, &#39;initrd&#39;, &#39;lib&#39;, &#39;lost+</span>
<span class="go">found&#39;, &#39;mnt&#39;, &#39;proc&#39;, &#39;root&#39;, &#39;sbin&#39;, &#39;tmp&#39;, &#39;usr&#39;, &#39;var&#39;, &#39;vmlinuz&#39;]</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">dircache</span><span class="o">.</span><span class="n">annotate</span><span class="p">(</span><span class="s">&#39;/&#39;</span><span class="p">,</span> <span class="n">a</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">a</span>
<span class="go">[&#39;bin/&#39;, &#39;boot/&#39;, &#39;cdrom/&#39;, &#39;dev/&#39;, &#39;etc/&#39;, &#39;floppy/&#39;, &#39;home/&#39;, &#39;initrd/&#39;, &#39;lib/</span>
<span class="go">&#39;, &#39;lost+found/&#39;, &#39;mnt/&#39;, &#39;proc/&#39;, &#39;root/&#39;, &#39;sbin/&#39;, &#39;tmp/&#39;, &#39;usr/&#39;, &#39;var/&#39;, &#39;vm</span>
<span class="go">linuz&#39;]</span>
</pre></div>
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