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<div class="section" id="module-pwd">
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<span id="pwd-the-password-database"></span><h1>35.2. <a class="reference internal" href="#module-pwd" title="pwd: The password database (getpwnam() and friends). (Unix)"><code class="xref py py-mod docutils literal"><span class="pre">pwd</span></code></a> — The password database<a class="headerlink" href="#module-pwd" title="Permalink to this headline">¶</a></h1>
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<p>This module provides access to the Unix user account and password database. It
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is available on all Unix versions.</p>
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<p>Password database entries are reported as a tuple-like object, whose attributes
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correspond to the members of the <code class="docutils literal"><span class="pre">passwd</span></code> structure (Attribute field below,
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see <code class="docutils literal"><span class="pre"><pwd.h></span></code>):</p>
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<table border="1" class="docutils">
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<thead valign="bottom">
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<tr class="row-odd"><th class="head">Index</th>
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<th class="head">Attribute</th>
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<th class="head">Meaning</th>
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<tr class="row-even"><td>0</td>
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<td><code class="docutils literal"><span class="pre">pw_name</span></code></td>
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<tr class="row-odd"><td>1</td>
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<td><code class="docutils literal"><span class="pre">pw_passwd</span></code></td>
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<td>Optional encrypted password</td>
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<tr class="row-even"><td>2</td>
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<td><code class="docutils literal"><span class="pre">pw_uid</span></code></td>
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<td>Numerical user ID</td>
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<tr class="row-odd"><td>3</td>
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<td><code class="docutils literal"><span class="pre">pw_gid</span></code></td>
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<td>Numerical group ID</td>
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<tr class="row-even"><td>4</td>
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<td><code class="docutils literal"><span class="pre">pw_gecos</span></code></td>
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<td>User name or comment field</td>
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<tr class="row-odd"><td>5</td>
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<td><code class="docutils literal"><span class="pre">pw_dir</span></code></td>
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<td>User home directory</td>
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<tr class="row-even"><td>6</td>
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<td><code class="docutils literal"><span class="pre">pw_shell</span></code></td>
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<td>User command interpreter</td>
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<p>The uid and gid items are integers, all others are strings. <a class="reference internal" href="exceptions.html#KeyError" title="KeyError"><code class="xref py py-exc docutils literal"><span class="pre">KeyError</span></code></a> is
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raised if the entry asked for cannot be found.</p>
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<div class="admonition note">
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<p class="first admonition-title">Note</p>
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<p class="last" id="index-0">In traditional Unix the field <code class="docutils literal"><span class="pre">pw_passwd</span></code> usually contains a password
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encrypted with a DES derived algorithm (see module <a class="reference internal" href="crypt.html#module-crypt" title="crypt: The crypt() function used to check Unix passwords. (Unix)"><code class="xref py py-mod docutils literal"><span class="pre">crypt</span></code></a>). However most
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modern unices use a so-called <em>shadow password</em> system. On those unices the
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<em>pw_passwd</em> field only contains an asterisk (<code class="docutils literal"><span class="pre">'*'</span></code>) or the letter <code class="docutils literal"><span class="pre">'x'</span></code>
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where the encrypted password is stored in a file <code class="file docutils literal"><span class="pre">/etc/shadow</span></code> which is
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not world readable. Whether the <em>pw_passwd</em> field contains anything useful is
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system-dependent. If available, the <a class="reference internal" href="spwd.html#module-spwd" title="spwd: The shadow password database (getspnam() and friends). (Unix)"><code class="xref py py-mod docutils literal"><span class="pre">spwd</span></code></a> module should be used where
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access to the encrypted password is required.</p>
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<p>It defines the following items:</p>
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<dl class="function">
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<dt id="pwd.getpwuid">
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<code class="descclassname">pwd.</code><code class="descname">getpwuid</code><span class="sig-paren">(</span><em>uid</em><span class="sig-paren">)</span><a class="headerlink" href="#pwd.getpwuid" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the password database entry for the given numeric user ID.</p>
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<dl class="function">
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<dt id="pwd.getpwnam">
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<code class="descclassname">pwd.</code><code class="descname">getpwnam</code><span class="sig-paren">(</span><em>name</em><span class="sig-paren">)</span><a class="headerlink" href="#pwd.getpwnam" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return the password database entry for the given user name.</p>
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<dl class="function">
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<dt id="pwd.getpwall">
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<code class="descclassname">pwd.</code><code class="descname">getpwall</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pwd.getpwall" title="Permalink to this definition">¶</a></dt>
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<dd><p>Return a list of all available password database entries, in arbitrary order.</p>
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<div class="admonition seealso">
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<p class="first admonition-title">See also</p>
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<dl class="last docutils">
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<dt>Module <a class="reference internal" href="grp.html#module-grp" title="grp: The group database (getgrnam() and friends). (Unix)"><code class="xref py py-mod docutils literal"><span class="pre">grp</span></code></a></dt>
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<dd>An interface to the group database, similar to this.</dd>
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<dt>Module <a class="reference internal" href="spwd.html#module-spwd" title="spwd: The shadow password database (getspnam() and friends). (Unix)"><code class="xref py py-mod docutils literal"><span class="pre">spwd</span></code></a></dt>
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<dd>An interface to the shadow password database, similar to this.</dd>
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