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  <section id="module-uu">
<span id="uu-encode-and-decode-uuencode-files"></span><h1><span class="section-number">18.16. </span><a class="reference internal" href="#module-uu" title="uu: Encode and decode files in uuencode format."><code class="xref py py-mod docutils literal notranslate"><span class="pre">uu</span></code></a> — Encode and decode uuencode files<a class="headerlink" href="#module-uu" title="Permalink to this headline">¶</a></h1>
<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/2.7/Lib/uu.py">Lib/uu.py</a></p>
<hr class="docutils" />
<p>This module encodes and decodes files in uuencode format, allowing arbitrary
binary data to be transferred over ASCII-only connections. Wherever a file
argument is expected, the methods accept a file-like object.  For backwards
compatibility, a string containing a pathname is also accepted, and the
corresponding file will be opened for reading and writing; the pathname <code class="docutils literal notranslate"><span class="pre">'-'</span></code>
is understood to mean the standard input or output.  However, this interface is
deprecated; it’s better for the caller to open the file itself, and be sure
that, when required, the mode is <code class="docutils literal notranslate"><span class="pre">'rb'</span></code> or <code class="docutils literal notranslate"><span class="pre">'wb'</span></code> on Windows.</p>
<p id="index-0">This code was contributed by Lance Ellinghouse, and modified by Jack Jansen.</p>
<p>The <a class="reference internal" href="#module-uu" title="uu: Encode and decode files in uuencode format."><code class="xref py py-mod docutils literal notranslate"><span class="pre">uu</span></code></a> module defines the following functions:</p>
<dl class="py function">
<dt class="sig sig-object py" id="uu.encode">
<span class="sig-prename descclassname"><span class="pre">uu.</span></span><span class="sig-name descname"><span class="pre">encode</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">in_file</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">out_file</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">name</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">mode</span></span></em><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#uu.encode" title="Permalink to this definition">¶</a></dt>
<dd><p>Uuencode file <em>in_file</em> into file <em>out_file</em>.  The uuencoded file will have the
header specifying <em>name</em> and <em>mode</em> as the defaults for the results of decoding
the file. The default defaults are taken from <em>in_file</em>, or <code class="docutils literal notranslate"><span class="pre">'-'</span></code> and <code class="docutils literal notranslate"><span class="pre">0666</span></code>
respectively.</p>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="uu.decode">
<span class="sig-prename descclassname"><span class="pre">uu.</span></span><span class="sig-name descname"><span class="pre">decode</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">in_file</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">out_file</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">mode</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">quiet</span></span></em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#uu.decode" title="Permalink to this definition">¶</a></dt>
<dd><p>This call decodes uuencoded file <em>in_file</em> placing the result on file
<em>out_file</em>. If <em>out_file</em> is a pathname, <em>mode</em> is used to set the permission
bits if the file must be created. Defaults for <em>out_file</em> and <em>mode</em> are taken
from the uuencode header.  However, if the file specified in the header already
exists, a <a class="reference internal" href="#uu.Error" title="uu.Error"><code class="xref py py-exc docutils literal notranslate"><span class="pre">uu.Error</span></code></a> is raised.</p>
<p><a class="reference internal" href="#uu.decode" title="uu.decode"><code class="xref py py-func docutils literal notranslate"><span class="pre">decode()</span></code></a> may print a warning to standard error if the input was produced
by an incorrect uuencoder and Python could recover from that error.  Setting
<em>quiet</em> to a true value silences this warning.</p>
</dd></dl>

<dl class="py exception">
<dt class="sig sig-object py" id="uu.Error">
<em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">uu.</span></span><span class="sig-name descname"><span class="pre">Error</span></span><a class="headerlink" href="#uu.Error" title="Permalink to this definition">¶</a></dt>
<dd><p>Subclass of <code class="xref py py-exc docutils literal notranslate"><span class="pre">Exception</span></code>, this can be raised by <a class="reference internal" href="#uu.decode" title="uu.decode"><code class="xref py py-func docutils literal notranslate"><span class="pre">uu.decode()</span></code></a> under
various situations, such as described above, but also including a badly
formatted header, or truncated input file.</p>
</dd></dl>

<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt>Module <a class="reference internal" href="binascii.html#module-binascii" title="binascii: Tools for converting between binary and various ASCII-encoded binary representations."><code class="xref py py-mod docutils literal notranslate"><span class="pre">binascii</span></code></a></dt><dd><p>Support module containing ASCII-to-binary and binary-to-ASCII conversions.</p>
</dd>
</dl>
</div>
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