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<section id="module-plistlib">
<span id="plistlib-generate-and-parse-apple-plist-files"></span><h1><code class="xref py py-mod docutils literal notranslate"><span class="pre">plistlib</span></code> — Generate and parse Apple <code class="docutils literal notranslate"><span class="pre">.plist</span></code> files<a class="headerlink" href="#module-plistlib" title="Link to this heading">¶</a></h1>
<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.12/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 by Apple, primarily on macOS and iOS. This module 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="stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytes</span></code></a>, <a class="reference internal" href="stdtypes.html#bytearray" title="bytearray"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytearray</span></code></a>
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="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.8: </span>Support added for reading and writing <a class="reference internal" href="#plistlib.UID" title="plistlib.UID"><code class="xref py py-class docutils literal notranslate"><span class="pre">UID</span></code></a> tokens in binary plists as used
by NSKeyedArchiver and NSKeyedUnarchiver.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.9: </span>Old API removed.</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/archive/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="py function">
<dt class="sig sig-object py" id="plistlib.load">
<span class="sig-prename descclassname"><span class="pre">plistlib.</span></span><span class="sig-name descname"><span class="pre">load</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">fp</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fmt</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">dict_type</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">dict</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.load" title="Link 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>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">Added in version 3.4.</span></p>
</div>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="plistlib.loads">
<span class="sig-prename descclassname"><span class="pre">plistlib.</span></span><span class="sig-name descname"><span class="pre">loads</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">data</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fmt</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">dict_type</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">dict</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.loads" title="Link 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">Added in version 3.4.</span></p>
</div>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="plistlib.dump">
<span class="sig-prename descclassname"><span class="pre">plistlib.</span></span><span class="sig-name descname"><span class="pre">dump</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">value</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fp</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fmt</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">FMT_XML</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">sort_keys</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">skipkeys</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">False</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.dump" title="Link 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">Added in version 3.4.</span></p>
</div>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="plistlib.dumps">
<span class="sig-prename descclassname"><span class="pre">plistlib.</span></span><span class="sig-name descname"><span class="pre">dumps</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">value</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fmt</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">FMT_XML</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">sort_keys</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">skipkeys</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">False</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.dumps" title="Link 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">Added in version 3.4.</span></p>
</div>
</dd></dl>
<p>The following classes are available:</p>
<dl class="py class">
<dt class="sig sig-object py" id="plistlib.UID">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">plistlib.</span></span><span class="sig-name descname"><span class="pre">UID</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">data</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#plistlib.UID" title="Link to this definition">¶</a></dt>
<dd><p>Wraps an <a class="reference internal" href="functions.html#int" title="int"><code class="xref py py-class docutils literal notranslate"><span class="pre">int</span></code></a>. This is used when reading or writing NSKeyedArchiver
encoded data, which contains UID (see PList manual).</p>
<p>It has one attribute, <code class="xref py py-attr docutils literal notranslate"><span class="pre">data</span></code>, which can be used to retrieve the int value
of the UID. <code class="xref py py-attr docutils literal notranslate"><span class="pre">data</span></code> must be in the range <code class="docutils literal notranslate"><span class="pre">0</span> <span class="pre"><=</span> <span class="pre">data</span> <span class="pre"><</span> <span class="pre">2**64</span></code>.</p>
<div class="versionadded">
<p><span class="versionmodified added">Added in version 3.8.</span></p>
</div>
</dd></dl>
<p>The following constants are available:</p>
<dl class="py data">
<dt class="sig sig-object py" id="plistlib.FMT_XML">
<span class="sig-prename descclassname"><span class="pre">plistlib.</span></span><span class="sig-name descname"><span class="pre">FMT_XML</span></span><a class="headerlink" href="#plistlib.FMT_XML" title="Link to this definition">¶</a></dt>
<dd><p>The XML format for plist files.</p>
<div class="versionadded">
<p><span class="versionmodified added">Added in version 3.4.</span></p>
</div>
</dd></dl>
<dl class="py data">
<dt class="sig sig-object py" id="plistlib.FMT_BINARY">
<span class="sig-prename descclassname"><span class="pre">plistlib.</span></span><span class="sig-name descname"><span class="pre">FMT_BINARY</span></span><a class="headerlink" href="#plistlib.FMT_BINARY" title="Link to this definition">¶</a></dt>
<dd><p>The binary format for plist files</p>
<div class="versionadded">
<p><span class="versionmodified added">Added in version 3.4.</span></p>
</div>
</dd></dl>
<section id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Link to this heading">¶</a></h2>
<p>Generating a plist:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">datetime</span>
<span class="kn">import</span> <span class="nn">plistlib</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">"Doodah"</span><span class="p">,</span>
<span class="n">aList</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"A"</span><span class="p">,</span> <span class="s2">"B"</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">"<hello & hi there!>"</span><span class="p">,</span>
<span class="n">aThirdString</span> <span class="o">=</span> <span class="s2">"M</span><span class="se">\xe4</span><span class="s2">ssig, Ma</span><span class="se">\xdf</span><span class="s2">"</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">"<binary gunk>"</span><span class="p">,</span>
<span class="n">someMoreData</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">"<lots of binary gunk>"</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">now</span><span class="p">()</span>
<span class="p">)</span>
<span class="nb">print</span><span class="p">(</span><span class="n">plistlib</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">pl</span><span class="p">)</span><span class="o">.</span><span class="n">decode</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="kn">import</span> <span class="nn">plistlib</span>
<span class="n">plist</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">"""<plist version="1.0"></span>
<span class="s2"><dict></span>
<span class="s2"> <key>foo</key></span>
<span class="s2"> <string>bar</string></span>
<span class="s2"></dict></span>
<span class="s2"></plist>"""</span>
<span class="n">pl</span> <span class="o">=</span> <span class="n">plistlib</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">plist</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">"foo"</span><span class="p">])</span>
</pre></div>
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