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  <div class="section" id="module-netrc">
<span id="netrc-netrc-file-processing"></span><h1>14.3. <a class="reference internal" href="#module-netrc" title="netrc: Loading of .netrc files."><code class="xref py py-mod docutils literal notranslate"><span class="pre">netrc</span></code></a> — netrc file processing<a class="headerlink" href="#module-netrc" title="Permalink to this headline">¶</a></h1>
<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.6/Lib/netrc.py">Lib/netrc.py</a></p>
<hr class="docutils" />
<p>The <a class="reference internal" href="#netrc.netrc" title="netrc.netrc"><code class="xref py py-class docutils literal notranslate"><span class="pre">netrc</span></code></a> class parses and encapsulates the netrc file format used by
the Unix <strong class="program">ftp</strong> program and other FTP clients.</p>
<dl class="class">
<dt id="netrc.netrc">
<em class="property">class </em><code class="descclassname">netrc.</code><code class="descname">netrc</code><span class="sig-paren">(</span><span class="optional">[</span><em>file</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#netrc.netrc" title="Permalink to this definition">¶</a></dt>
<dd><p>A <a class="reference internal" href="#netrc.netrc" title="netrc.netrc"><code class="xref py py-class docutils literal notranslate"><span class="pre">netrc</span></code></a> instance or subclass instance encapsulates data from  a netrc
file.  The initialization argument, if present, specifies the file to parse.  If
no argument is given, the file <code class="file docutils literal notranslate"><span class="pre">.netrc</span></code> in the user’s home directory will
be read.  Parse errors will raise <a class="reference internal" href="#netrc.NetrcParseError" title="netrc.NetrcParseError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">NetrcParseError</span></code></a> with diagnostic
information including the file name, line number, and terminating token.
If no argument is specified on a POSIX system, the presence of passwords in
the <code class="file docutils literal notranslate"><span class="pre">.netrc</span></code> file will raise a <a class="reference internal" href="#netrc.NetrcParseError" title="netrc.NetrcParseError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">NetrcParseError</span></code></a> if the file
ownership or permissions are insecure (owned by a user other than the user
running the process, or accessible for read or write by any other user).
This implements security behavior equivalent to that of ftp and other
programs that use <code class="file docutils literal notranslate"><span class="pre">.netrc</span></code>.</p>
<div class="versionchanged">
<p><span class="versionmodified">Changed in version 3.4: </span>Added the POSIX permission check.</p>
</div>
</dd></dl>

<dl class="exception">
<dt id="netrc.NetrcParseError">
<em class="property">exception </em><code class="descclassname">netrc.</code><code class="descname">NetrcParseError</code><a class="headerlink" href="#netrc.NetrcParseError" title="Permalink to this definition">¶</a></dt>
<dd><p>Exception raised by the <a class="reference internal" href="#netrc.netrc" title="netrc.netrc"><code class="xref py py-class docutils literal notranslate"><span class="pre">netrc</span></code></a> class when syntactical errors are
encountered in source text.  Instances of this exception provide three
interesting attributes:  <code class="xref py py-attr docutils literal notranslate"><span class="pre">msg</span></code> is a textual explanation of the error,
<code class="xref py py-attr docutils literal notranslate"><span class="pre">filename</span></code> is the name of the source file, and <code class="xref py py-attr docutils literal notranslate"><span class="pre">lineno</span></code> gives the
line number on which the error was found.</p>
</dd></dl>

<div class="section" id="netrc-objects">
<span id="id1"></span><h2>14.3.1. netrc Objects<a class="headerlink" href="#netrc-objects" title="Permalink to this headline">¶</a></h2>
<p>A <a class="reference internal" href="#netrc.netrc" title="netrc.netrc"><code class="xref py py-class docutils literal notranslate"><span class="pre">netrc</span></code></a> instance has the following methods:</p>
<dl class="method">
<dt id="netrc.netrc.authenticators">
<code class="descclassname">netrc.</code><code class="descname">authenticators</code><span class="sig-paren">(</span><em>host</em><span class="sig-paren">)</span><a class="headerlink" href="#netrc.netrc.authenticators" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a 3-tuple <code class="docutils literal notranslate"><span class="pre">(login,</span> <span class="pre">account,</span> <span class="pre">password)</span></code> of authenticators for <em>host</em>.
If the netrc file did not contain an entry for the given host, return the tuple
associated with the ‘default’ entry.  If neither matching host nor default entry
is available, return <code class="docutils literal notranslate"><span class="pre">None</span></code>.</p>
</dd></dl>

<dl class="method">
<dt id="netrc.netrc.__repr__">
<code class="descclassname">netrc.</code><code class="descname">__repr__</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#netrc.netrc.__repr__" title="Permalink to this definition">¶</a></dt>
<dd><p>Dump the class data as a string in the format of a netrc file. (This discards
comments and may reorder the entries.)</p>
</dd></dl>

<p>Instances of <a class="reference internal" href="#netrc.netrc" title="netrc.netrc"><code class="xref py py-class docutils literal notranslate"><span class="pre">netrc</span></code></a> have public instance variables:</p>
<dl class="attribute">
<dt id="netrc.netrc.hosts">
<code class="descclassname">netrc.</code><code class="descname">hosts</code><a class="headerlink" href="#netrc.netrc.hosts" title="Permalink to this definition">¶</a></dt>
<dd><p>Dictionary mapping host names to <code class="docutils literal notranslate"><span class="pre">(login,</span> <span class="pre">account,</span> <span class="pre">password)</span></code> tuples.  The
‘default’ entry, if any, is represented as a pseudo-host by that name.</p>
</dd></dl>

<dl class="attribute">
<dt id="netrc.netrc.macros">
<code class="descclassname">netrc.</code><code class="descname">macros</code><a class="headerlink" href="#netrc.netrc.macros" title="Permalink to this definition">¶</a></dt>
<dd><p>Dictionary mapping macro names to string lists.</p>
</dd></dl>

<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">Passwords are limited to a subset of the ASCII character set.  All ASCII
punctuation is allowed in passwords, however, note that whitespace and
non-printable characters are not allowed in passwords.  This is a limitation
of the way the .netrc file is parsed and may be removed in the future.</p>
</div>
</div>
</div>


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<li><a class="reference internal" href="#">14.3. <code class="docutils literal notranslate"><span class="pre">netrc</span></code> — netrc file processing</a><ul>
<li><a class="reference internal" href="#netrc-objects">14.3.1. netrc Objects</a></li>
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