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<div class="section" id="module-quopri">
<span id="quopri-encode-and-decode-mime-quoted-printable-data"></span><h1>18.15. <a class="reference internal" href="#module-quopri" title="quopri: Encode and decode files using the MIME quoted-printable encoding."><code class="xref py py-mod docutils literal notranslate"><span class="pre">quopri</span></code></a> — Encode and decode MIME quoted-printable data<a class="headerlink" href="#module-quopri" title="Permalink to this headline">¶</a></h1>
<p id="index-0"><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/2.7/Lib/quopri.py">Lib/quopri.py</a></p>
<hr class="docutils" />
<p>This module performs quoted-printable transport encoding and decoding, as
defined in <span class="target" id="index-1"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc1521.html"><strong>RFC 1521</strong></a>: “MIME (Multipurpose Internet Mail Extensions) Part One:
Mechanisms for Specifying and Describing the Format of Internet Message Bodies”.
The quoted-printable encoding is designed for data where there are relatively
few nonprintable characters; the base64 encoding scheme available via the
<a class="reference internal" href="base64.html#module-base64" title="base64: RFC 3548: Base16, Base32, Base64 Data Encodings"><code class="xref py py-mod docutils literal notranslate"><span class="pre">base64</span></code></a> module is more compact if there are many such characters, as when
sending a graphics file.</p>
<dl class="function">
<dt id="quopri.decode">
<code class="descclassname">quopri.</code><code class="descname">decode</code><span class="sig-paren">(</span><em>input</em>, <em>output</em><span class="optional">[</span>, <em>header</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#quopri.decode" title="Permalink to this definition">¶</a></dt>
<dd><p>Decode the contents of the <em>input</em> file and write the resulting decoded binary
data to the <em>output</em> file. <em>input</em> and <em>output</em> must either be file objects or
objects that mimic the file object interface. <em>input</em> will be read until
<code class="docutils literal notranslate"><span class="pre">input.readline()</span></code> returns an empty string. If the optional argument <em>header</em>
is present and true, underscore will be decoded as space. This is used to decode
“Q”-encoded headers as described in <span class="target" id="index-2"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc1522.html"><strong>RFC 1522</strong></a>: “MIME (Multipurpose Internet
Mail Extensions) Part Two: Message Header Extensions for Non-ASCII Text”.</p>
</dd></dl>
<dl class="function">
<dt id="quopri.encode">
<code class="descclassname">quopri.</code><code class="descname">encode</code><span class="sig-paren">(</span><em>input</em>, <em>output</em>, <em>quotetabs</em><span class="sig-paren">)</span><a class="headerlink" href="#quopri.encode" title="Permalink to this definition">¶</a></dt>
<dd><p>Encode the contents of the <em>input</em> file and write the resulting quoted-printable
data to the <em>output</em> file. <em>input</em> and <em>output</em> must either be file objects or
objects that mimic the file object interface. <em>input</em> will be read until
<code class="docutils literal notranslate"><span class="pre">input.readline()</span></code> returns an empty string. <em>quotetabs</em> is a flag which
controls whether to encode embedded spaces and tabs; when true it encodes such
embedded whitespace, and when false it leaves them unencoded. Note that spaces
and tabs appearing at the end of lines are always encoded, as per <span class="target" id="index-3"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc1521.html"><strong>RFC 1521</strong></a>.</p>
</dd></dl>
<dl class="function">
<dt id="quopri.decodestring">
<code class="descclassname">quopri.</code><code class="descname">decodestring</code><span class="sig-paren">(</span><em>s</em><span class="optional">[</span>, <em>header</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#quopri.decodestring" title="Permalink to this definition">¶</a></dt>
<dd><p>Like <a class="reference internal" href="#quopri.decode" title="quopri.decode"><code class="xref py py-func docutils literal notranslate"><span class="pre">decode()</span></code></a>, except that it accepts a source string and returns the
corresponding decoded string.</p>
</dd></dl>
<dl class="function">
<dt id="quopri.encodestring">
<code class="descclassname">quopri.</code><code class="descname">encodestring</code><span class="sig-paren">(</span><em>s</em><span class="optional">[</span>, <em>quotetabs</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#quopri.encodestring" title="Permalink to this definition">¶</a></dt>
<dd><p>Like <a class="reference internal" href="#quopri.encode" title="quopri.encode"><code class="xref py py-func docutils literal notranslate"><span class="pre">encode()</span></code></a>, except that it accepts a source string and returns the
corresponding encoded string. <em>quotetabs</em> is optional (defaulting to 0), and is
passed straight through to <a class="reference internal" href="#quopri.encode" title="quopri.encode"><code class="xref py py-func docutils literal notranslate"><span class="pre">encode()</span></code></a>.</p>
</dd></dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt>Module <a class="reference internal" href="mimify.html#module-mimify" title="mimify: Mimification and unmimification of mail messages. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">mimify</span></code></a></dt><dd><p>General utilities for processing of MIME messages.</p>
</dd>
<dt>Module <a class="reference internal" href="base64.html#module-base64" title="base64: RFC 3548: Base16, Base32, Base64 Data Encodings"><code class="xref py py-mod docutils literal notranslate"><span class="pre">base64</span></code></a></dt><dd><p>Encode and decode MIME base64 data</p>
</dd>
</dl>
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