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<title>plistlib — Generate and parse Mac OS X .plist files &#8212; Python 3.7.4 documentation</title>
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<div class="section" id="module-plistlib">
<span id="plistlib-generate-and-parse-mac-os-x-plist-files"></span><h1><a class="reference internal" href="#module-plistlib" title="plistlib: Generate and parse Mac OS X plist files."><code class="xref py py-mod docutils literal notranslate"><span class="pre">plistlib</span></code></a> — Generate and parse Mac OS X <code class="docutils literal notranslate"><span class="pre">.plist</span></code> files<a class="headerlink" href="#module-plistlib" title="Permalink to this headline"></a></h1>
<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.7/Lib/plistlib.py">Lib/plistlib.py</a></p>
<hr class="docutils" id="index-0" />
<p>This module provides an interface for reading and writing the “property list”
files used mainly by Mac OS X and supports both binary and XML plist files.</p>
<p>The property list (<code class="docutils literal notranslate"><span class="pre">.plist</span></code>) file format is a simple serialization supporting
basic object types, like dictionaries, lists, numbers and strings. Usually the
top level object is a dictionary.</p>
<p>To write out and to parse a plist file, use the <a class="reference internal" href="#plistlib.dump" title="plistlib.dump"><code class="xref py py-func docutils literal notranslate"><span class="pre">dump()</span></code></a> and
<a class="reference internal" href="#plistlib.load" title="plistlib.load"><code class="xref py py-func docutils literal notranslate"><span class="pre">load()</span></code></a> functions.</p>
<p>To work with plist data in bytes objects, use <a class="reference internal" href="#plistlib.dumps" title="plistlib.dumps"><code class="xref py py-func docutils literal notranslate"><span class="pre">dumps()</span></code></a>
and <a class="reference internal" href="#plistlib.loads" title="plistlib.loads"><code class="xref py py-func docutils literal notranslate"><span class="pre">loads()</span></code></a>.</p>
<p>Values can be strings, integers, floats, booleans, tuples, lists, dictionaries
(but only with string keys), <a class="reference internal" href="#plistlib.Data" title="plistlib.Data"><code class="xref py py-class docutils literal notranslate"><span class="pre">Data</span></code></a>, <a class="reference internal" href="stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytes</span></code></a>, <code class="xref py py-class docutils literal notranslate"><span class="pre">bytesarray</span></code>
or <a class="reference internal" href="datetime.html#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime.datetime</span></code></a> objects.</p>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.4: </span>New API, old API deprecated. Support for binary format plists added.</p>
</div>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt><a class="reference external" href="https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/PropertyLists/">PList manual page</a></dt><dd><p>Apple’s documentation of the file format.</p>
</dd>
</dl>
</div>
<p>This module defines the following functions:</p>
<dl class="function">
<dt id="plistlib.load">
<code class="descclassname">plistlib.</code><code class="descname">load</code><span class="sig-paren">(</span><em>fp</em>, <em>*</em>, <em>fmt=None</em>, <em>use_builtin_types=True</em>, <em>dict_type=dict</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.load" title="Permalink to this definition"></a></dt>
<dd><p>Read a plist file. <em>fp</em> should be a readable and binary file object.
Return the unpacked root object (which usually is a
dictionary).</p>
<p>The <em>fmt</em> is the format of the file and the following values are valid:</p>
<ul class="simple">
<li><p><a class="reference internal" href="constants.html#None" title="None"><code class="xref py py-data docutils literal notranslate"><span class="pre">None</span></code></a>: Autodetect the file format</p></li>
<li><p><a class="reference internal" href="#plistlib.FMT_XML" title="plistlib.FMT_XML"><code class="xref py py-data docutils literal notranslate"><span class="pre">FMT_XML</span></code></a>: XML file format</p></li>
<li><p><a class="reference internal" href="#plistlib.FMT_BINARY" title="plistlib.FMT_BINARY"><code class="xref py py-data docutils literal notranslate"><span class="pre">FMT_BINARY</span></code></a>: Binary plist format</p></li>
</ul>
<p>If <em>use_builtin_types</em> is true (the default) binary data will be returned
as instances of <a class="reference internal" href="stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytes</span></code></a>, otherwise it is returned as instances of
<a class="reference internal" href="#plistlib.Data" title="plistlib.Data"><code class="xref py py-class docutils literal notranslate"><span class="pre">Data</span></code></a>.</p>
<p>The <em>dict_type</em> is the type used for dictionaries that are read from the
plist file.</p>
<p>XML data for the <a class="reference internal" href="#plistlib.FMT_XML" title="plistlib.FMT_XML"><code class="xref py py-data docutils literal notranslate"><span class="pre">FMT_XML</span></code></a> format is parsed using the Expat parser
from <a class="reference internal" href="pyexpat.html#module-xml.parsers.expat" title="xml.parsers.expat: An interface to the Expat non-validating XML parser."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.parsers.expat</span></code></a> – see its documentation for possible
exceptions on ill-formed XML. Unknown elements will simply be ignored
by the plist parser.</p>
<p>The parser for the binary format raises <code class="xref py py-exc docutils literal notranslate"><span class="pre">InvalidFileException</span></code>
when the file cannot be parsed.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.4.</span></p>
</div>
</dd></dl>
<dl class="function">
<dt id="plistlib.loads">
<code class="descclassname">plistlib.</code><code class="descname">loads</code><span class="sig-paren">(</span><em>data</em>, <em>*</em>, <em>fmt=None</em>, <em>use_builtin_types=True</em>, <em>dict_type=dict</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.loads" title="Permalink to this definition"></a></dt>
<dd><p>Load a plist from a bytes object. See <a class="reference internal" href="#plistlib.load" title="plistlib.load"><code class="xref py py-func docutils literal notranslate"><span class="pre">load()</span></code></a> for an explanation of
the keyword arguments.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.4.</span></p>
</div>
</dd></dl>
<dl class="function">
<dt id="plistlib.dump">
<code class="descclassname">plistlib.</code><code class="descname">dump</code><span class="sig-paren">(</span><em>value</em>, <em>fp</em>, <em>*</em>, <em>fmt=FMT_XML</em>, <em>sort_keys=True</em>, <em>skipkeys=False</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.dump" title="Permalink to this definition"></a></dt>
<dd><p>Write <em>value</em> to a plist file. <em>Fp</em> should be a writable, binary
file object.</p>
<p>The <em>fmt</em> argument specifies the format of the plist file and can be
one of the following values:</p>
<ul class="simple">
<li><p><a class="reference internal" href="#plistlib.FMT_XML" title="plistlib.FMT_XML"><code class="xref py py-data docutils literal notranslate"><span class="pre">FMT_XML</span></code></a>: XML formatted plist file</p></li>
<li><p><a class="reference internal" href="#plistlib.FMT_BINARY" title="plistlib.FMT_BINARY"><code class="xref py py-data docutils literal notranslate"><span class="pre">FMT_BINARY</span></code></a>: Binary formatted plist file</p></li>
</ul>
<p>When <em>sort_keys</em> is true (the default) the keys for dictionaries will be
written to the plist in sorted order, otherwise they will be written in
the iteration order of the dictionary.</p>
<p>When <em>skipkeys</em> is false (the default) the function raises <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>
when a key of a dictionary is not a string, otherwise such keys are skipped.</p>
<p>A <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> will be raised if the object is of an unsupported type or
a container that contains objects of unsupported types.</p>
<p>An <a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> will be raised for integer values that cannot
be represented in (binary) plist files.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.4.</span></p>
</div>
</dd></dl>
<dl class="function">
<dt id="plistlib.dumps">
<code class="descclassname">plistlib.</code><code class="descname">dumps</code><span class="sig-paren">(</span><em>value</em>, <em>*</em>, <em>fmt=FMT_XML</em>, <em>sort_keys=True</em>, <em>skipkeys=False</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.dumps" title="Permalink to this definition"></a></dt>
<dd><p>Return <em>value</em> as a plist-formatted bytes object. See
the documentation for <a class="reference internal" href="#plistlib.dump" title="plistlib.dump"><code class="xref py py-func docutils literal notranslate"><span class="pre">dump()</span></code></a> for an explanation of the keyword
arguments of this function.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.4.</span></p>
</div>
</dd></dl>
<p>The following functions are deprecated:</p>
<dl class="function">
<dt id="plistlib.readPlist">
<code class="descclassname">plistlib.</code><code class="descname">readPlist</code><span class="sig-paren">(</span><em>pathOrFile</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.readPlist" title="Permalink to this definition"></a></dt>
<dd><p>Read a plist file. <em>pathOrFile</em> may be either a file name or a (readable
and binary) file object. Returns the unpacked root object (which usually
is a dictionary).</p>
<p>This function calls <a class="reference internal" href="#plistlib.load" title="plistlib.load"><code class="xref py py-func docutils literal notranslate"><span class="pre">load()</span></code></a> to do the actual work, see the documentation
of <a class="reference internal" href="#plistlib.load" title="plistlib.load"><code class="xref py py-func docutils literal notranslate"><span class="pre">that</span> <span class="pre">function</span></code></a> for an explanation of the keyword arguments.</p>
<div class="deprecated">
<p><span class="versionmodified deprecated">Deprecated since version 3.4: </span>Use <a class="reference internal" href="#plistlib.load" title="plistlib.load"><code class="xref py py-func docutils literal notranslate"><span class="pre">load()</span></code></a> instead.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.7: </span>Dict values in the result are now normal dicts. You no longer can use
attribute access to access items of these dictionaries.</p>
</div>
</dd></dl>
<dl class="function">
<dt id="plistlib.writePlist">
<code class="descclassname">plistlib.</code><code class="descname">writePlist</code><span class="sig-paren">(</span><em>rootObject</em>, <em>pathOrFile</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.writePlist" title="Permalink to this definition"></a></dt>
<dd><p>Write <em>rootObject</em> to an XML plist file. <em>pathOrFile</em> may be either a file name
or a (writable and binary) file object</p>
<div class="deprecated">
<p><span class="versionmodified deprecated">Deprecated since version 3.4: </span>Use <a class="reference internal" href="#plistlib.dump" title="plistlib.dump"><code class="xref py py-func docutils literal notranslate"><span class="pre">dump()</span></code></a> instead.</p>
</div>
</dd></dl>
<dl class="function">
<dt id="plistlib.readPlistFromBytes">
<code class="descclassname">plistlib.</code><code class="descname">readPlistFromBytes</code><span class="sig-paren">(</span><em>data</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.readPlistFromBytes" title="Permalink to this definition"></a></dt>
<dd><p>Read a plist data from a bytes object. Return the root object.</p>
<p>See <a class="reference internal" href="#plistlib.load" title="plistlib.load"><code class="xref py py-func docutils literal notranslate"><span class="pre">load()</span></code></a> for a description of the keyword arguments.</p>
<div class="deprecated">
<p><span class="versionmodified deprecated">Deprecated since version 3.4: </span>Use <a class="reference internal" href="#plistlib.loads" title="plistlib.loads"><code class="xref py py-func docutils literal notranslate"><span class="pre">loads()</span></code></a> instead.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.7: </span>Dict values in the result are now normal dicts. You no longer can use
attribute access to access items of these dictionaries.</p>
</div>
</dd></dl>
<dl class="function">
<dt id="plistlib.writePlistToBytes">
<code class="descclassname">plistlib.</code><code class="descname">writePlistToBytes</code><span class="sig-paren">(</span><em>rootObject</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.writePlistToBytes" title="Permalink to this definition"></a></dt>
<dd><p>Return <em>rootObject</em> as an XML plist-formatted bytes object.</p>
<div class="deprecated">
<p><span class="versionmodified deprecated">Deprecated since version 3.4: </span>Use <a class="reference internal" href="#plistlib.dumps" title="plistlib.dumps"><code class="xref py py-func docutils literal notranslate"><span class="pre">dumps()</span></code></a> instead.</p>
</div>
</dd></dl>
<p>The following classes are available:</p>
<dl class="class">
<dt id="plistlib.Data">
<em class="property">class </em><code class="descclassname">plistlib.</code><code class="descname">Data</code><span class="sig-paren">(</span><em>data</em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.Data" title="Permalink to this definition"></a></dt>
<dd><p>Return a “data” wrapper object around the bytes object <em>data</em>. This is used
in functions converting from/to plists to represent the <code class="docutils literal notranslate"><span class="pre">&lt;data&gt;</span></code> type
available in plists.</p>
<p>It has one attribute, <code class="xref py py-attr docutils literal notranslate"><span class="pre">data</span></code>, that can be used to retrieve the Python
bytes object stored in it.</p>
<div class="deprecated">
<p><span class="versionmodified deprecated">Deprecated since version 3.4: </span>Use a <a class="reference internal" href="stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytes</span></code></a> object instead.</p>
</div>
</dd></dl>
<p>The following constants are available:</p>
<dl class="data">
<dt id="plistlib.FMT_XML">
<code class="descclassname">plistlib.</code><code class="descname">FMT_XML</code><a class="headerlink" href="#plistlib.FMT_XML" title="Permalink to this definition"></a></dt>
<dd><p>The XML format for plist files.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.4.</span></p>
</div>
</dd></dl>
<dl class="data">
<dt id="plistlib.FMT_BINARY">
<code class="descclassname">plistlib.</code><code class="descname">FMT_BINARY</code><a class="headerlink" href="#plistlib.FMT_BINARY" title="Permalink to this definition"></a></dt>
<dd><p>The binary format for plist files</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.4.</span></p>
</div>
</dd></dl>
<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h2>
<p>Generating a plist:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="n">pl</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span>
<span class="n">aString</span> <span class="o">=</span> <span class="s2">&quot;Doodah&quot;</span><span class="p">,</span>
<span class="n">aList</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;A&quot;</span><span class="p">,</span> <span class="s2">&quot;B&quot;</span><span class="p">,</span> <span class="mi">12</span><span class="p">,</span> <span class="mf">32.1</span><span class="p">,</span> <span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">]],</span>
<span class="n">aFloat</span> <span class="o">=</span> <span class="mf">0.1</span><span class="p">,</span>
<span class="n">anInt</span> <span class="o">=</span> <span class="mi">728</span><span class="p">,</span>
<span class="n">aDict</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span>
<span class="n">anotherString</span> <span class="o">=</span> <span class="s2">&quot;&lt;hello &amp; hi there!&gt;&quot;</span><span class="p">,</span>
<span class="n">aThirdString</span> <span class="o">=</span> <span class="s2">&quot;M</span><span class="se">\xe4</span><span class="s2">ssig, Ma</span><span class="se">\xdf</span><span class="s2">&quot;</span><span class="p">,</span>
<span class="n">aTrueValue</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span>
<span class="n">aFalseValue</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span>
<span class="p">),</span>
<span class="n">someData</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">&quot;&lt;binary gunk&gt;&quot;</span><span class="p">,</span>
<span class="n">someMoreData</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">&quot;&lt;lots of binary gunk&gt;&quot;</span> <span class="o">*</span> <span class="mi">10</span><span class="p">,</span>
<span class="n">aDate</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span><span class="o">.</span><span class="n">fromtimestamp</span><span class="p">(</span><span class="n">time</span><span class="o">.</span><span class="n">mktime</span><span class="p">(</span><span class="n">time</span><span class="o">.</span><span class="n">gmtime</span><span class="p">())),</span>
<span class="p">)</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">fileName</span><span class="p">,</span> <span class="s1">&#39;wb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">dump</span><span class="p">(</span><span class="n">pl</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span>
</pre></div>
</div>
<p>Parsing a plist:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">fileName</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">pl</span> <span class="o">=</span> <span class="n">load</span><span class="p">(</span><span class="n">fp</span><span class="p">)</span>
<span class="nb">print</span><span class="p">(</span><span class="n">pl</span><span class="p">[</span><span class="s2">&quot;aKey&quot;</span><span class="p">])</span>
</pre></div>
</div>
</div>
</div>
</div>
</div>
</div>
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<h3><a href="../contents.html">Table of Contents</a></h3>
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