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<section id="module-grp">
<span id="grp-the-group-database"></span><h1><code class="xref py py-mod docutils literal notranslate"><span class="pre">grp</span></code> — The group database<a class="headerlink" href="#module-grp" title="Link to this heading">¶</a></h1>
<hr class="docutils" />
<p>This module provides access to the Unix group database. It is available on all
Unix versions.</p>
<div class="availability docutils container">
<p><a class="reference internal" href="intro.html#availability"><span class="std std-ref">Availability</span></a>: Unix, not Emscripten, not WASI.</p>
</div>
<p>Group database entries are reported as a tuple-like object, whose attributes
correspond to the members of the <code class="docutils literal notranslate"><span class="pre">group</span></code> structure (Attribute field below, see
<code class="docutils literal notranslate"><span class="pre"><grp.h></span></code>):</p>
<table class="docutils align-default">
<thead>
<tr class="row-odd"><th class="head"><p>Index</p></th>
<th class="head"><p>Attribute</p></th>
<th class="head"><p>Meaning</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>0</p></td>
<td><p>gr_name</p></td>
<td><p>the name of the group</p></td>
</tr>
<tr class="row-odd"><td><p>1</p></td>
<td><p>gr_passwd</p></td>
<td><p>the (encrypted) group password;
often empty</p></td>
</tr>
<tr class="row-even"><td><p>2</p></td>
<td><p>gr_gid</p></td>
<td><p>the numerical group ID</p></td>
</tr>
<tr class="row-odd"><td><p>3</p></td>
<td><p>gr_mem</p></td>
<td><p>all the group member’s user
names</p></td>
</tr>
</tbody>
</table>
<p>The gid is an integer, name and password are strings, and the member list is a
list of strings. (Note that most users are not explicitly listed as members of
the group they are in according to the password database. Check both databases
to get complete membership information. Also note that a <code class="docutils literal notranslate"><span class="pre">gr_name</span></code> that
starts with a <code class="docutils literal notranslate"><span class="pre">+</span></code> or <code class="docutils literal notranslate"><span class="pre">-</span></code> is likely to be a YP/NIS reference and may not be
accessible via <a class="reference internal" href="#grp.getgrnam" title="grp.getgrnam"><code class="xref py py-func docutils literal notranslate"><span class="pre">getgrnam()</span></code></a> or <a class="reference internal" href="#grp.getgrgid" title="grp.getgrgid"><code class="xref py py-func docutils literal notranslate"><span class="pre">getgrgid()</span></code></a>.)</p>
<p>It defines the following items:</p>
<dl class="py function">
<dt class="sig sig-object py" id="grp.getgrgid">
<span class="sig-prename descclassname"><span class="pre">grp.</span></span><span class="sig-name descname"><span class="pre">getgrgid</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">id</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#grp.getgrgid" title="Link to this definition">¶</a></dt>
<dd><p>Return the group database entry for the given numeric group ID. <a class="reference internal" href="exceptions.html#KeyError" title="KeyError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">KeyError</span></code></a>
is raised if the entry asked for cannot be found.</p>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.10: </span><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> is raised for non-integer arguments like floats or strings.</p>
</div>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="grp.getgrnam">
<span class="sig-prename descclassname"><span class="pre">grp.</span></span><span class="sig-name descname"><span class="pre">getgrnam</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">name</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#grp.getgrnam" title="Link to this definition">¶</a></dt>
<dd><p>Return the group database entry for the given group name. <a class="reference internal" href="exceptions.html#KeyError" title="KeyError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">KeyError</span></code></a> is
raised if the entry asked for cannot be found.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="grp.getgrall">
<span class="sig-prename descclassname"><span class="pre">grp.</span></span><span class="sig-name descname"><span class="pre">getgrall</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#grp.getgrall" title="Link to this definition">¶</a></dt>
<dd><p>Return a list of all available group entries, in arbitrary order.</p>
</dd></dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt>Module <a class="reference internal" href="pwd.html#module-pwd" title="pwd: The password database (getpwnam() and friends). (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pwd</span></code></a></dt><dd><p>An interface to the user database, similar to this.</p>
</dd>
<dt>Module <a class="reference internal" href="spwd.html#module-spwd" title="spwd: The shadow password database (getspnam() and friends). (deprecated) (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">spwd</span></code></a></dt><dd><p>An interface to the shadow password database, similar to this.</p>
</dd>
</dl>
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