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  <section id="module-xml.sax">
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<span id="xml-sax-support-for-sax2-parsers"></span><h1><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax</span></code> — Support for SAX2 parsers<a class="headerlink" href="#module-xml.sax" title="Link to this heading">¶</a></h1>
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<p><strong>Source code:</strong> <a class="extlink-source reference external" href="https://github.com/python/cpython/tree/3.13/Lib/xml/sax/__init__.py">Lib/xml/sax/__init__.py</a></p>
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<hr class="docutils" />
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<p>The <a class="reference internal" href="#module-xml.sax" title="xml.sax: Package containing SAX2 base classes and convenience functions."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax</span></code></a> package provides a number of modules which implement the
 | 
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Simple API for XML (SAX) interface for Python.  The package itself provides the
 | 
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SAX exceptions and the convenience functions which will be most used by users of
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the SAX API.</p>
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<div class="admonition warning">
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<p class="admonition-title">Warning</p>
 | 
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<p>The <a class="reference internal" href="#module-xml.sax" title="xml.sax: Package containing SAX2 base classes and convenience functions."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax</span></code></a> module is not secure against maliciously
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constructed data.  If you need to parse untrusted or unauthenticated data see
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<a class="reference internal" href="xml.html#xml-vulnerabilities"><span class="std std-ref">XML vulnerabilities</span></a>.</p>
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</div>
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<div class="versionchanged">
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<p><span class="versionmodified changed">Changed in version 3.7.1: </span>The SAX parser no longer processes general external entities by default
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to increase security. Before, the parser created network connections
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to fetch remote files or loaded local files from the file
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system for DTD and entities. The feature can be enabled again with method
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<a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.XMLReader.setFeature" title="xml.sax.xmlreader.XMLReader.setFeature"><code class="xref py py-meth docutils literal notranslate"><span class="pre">setFeature()</span></code></a> on the parser object
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and argument <a class="reference internal" href="xml.sax.handler.html#xml.sax.handler.feature_external_ges" title="xml.sax.handler.feature_external_ges"><code class="xref py py-data docutils literal notranslate"><span class="pre">feature_external_ges</span></code></a>.</p>
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</div>
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<p>The convenience functions are:</p>
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<dl class="py function">
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<dt class="sig sig-object py" id="xml.sax.make_parser">
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<span class="sig-prename descclassname"><span class="pre">xml.sax.</span></span><span class="sig-name descname"><span class="pre">make_parser</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">parser_list</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">[]</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.make_parser" title="Link to this definition">¶</a></dt>
 | 
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<dd><p>Create and return a SAX <a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.XMLReader" title="xml.sax.xmlreader.XMLReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">XMLReader</span></code></a> object.  The
 | 
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first parser found will
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be used.  If <em>parser_list</em> is provided, it must be an iterable of strings which
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name modules that have a function named <code class="xref py py-func docutils literal notranslate"><span class="pre">create_parser()</span></code>.  Modules listed
 | 
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in <em>parser_list</em> will be used before modules in the default list of parsers.</p>
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<div class="versionchanged">
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<p><span class="versionmodified changed">Changed in version 3.8: </span>The <em>parser_list</em> argument can be any iterable, not just a list.</p>
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</div>
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</dd></dl>
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<dl class="py function">
 | 
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<dt class="sig sig-object py" id="xml.sax.parse">
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<span class="sig-prename descclassname"><span class="pre">xml.sax.</span></span><span class="sig-name descname"><span class="pre">parse</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">filename_or_stream</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">handler</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">error_handler</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">handler.ErrorHandler()</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.parse" title="Link to this definition">¶</a></dt>
 | 
						|
<dd><p>Create a SAX parser and use it to parse a document.  The document, passed in as
 | 
						|
<em>filename_or_stream</em>, can be a filename or a file object.  The <em>handler</em>
 | 
						|
parameter needs to be a SAX <a class="reference internal" href="xml.sax.handler.html#xml.sax.handler.ContentHandler" title="xml.sax.handler.ContentHandler"><code class="xref py py-class docutils literal notranslate"><span class="pre">ContentHandler</span></code></a> instance.  If
 | 
						|
<em>error_handler</em> is given, it must be a SAX <a class="reference internal" href="xml.sax.handler.html#xml.sax.handler.ErrorHandler" title="xml.sax.handler.ErrorHandler"><code class="xref py py-class docutils literal notranslate"><span class="pre">ErrorHandler</span></code></a>
 | 
						|
instance; if
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omitted,  <a class="reference internal" href="#xml.sax.SAXParseException" title="xml.sax.SAXParseException"><code class="xref py py-exc docutils literal notranslate"><span class="pre">SAXParseException</span></code></a> will be raised on all errors.  There is no
 | 
						|
return value; all work must be done by the <em>handler</em> passed in.</p>
 | 
						|
</dd></dl>
 | 
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 | 
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<dl class="py function">
 | 
						|
<dt class="sig sig-object py" id="xml.sax.parseString">
 | 
						|
<span class="sig-prename descclassname"><span class="pre">xml.sax.</span></span><span class="sig-name descname"><span class="pre">parseString</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">string</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">handler</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">error_handler</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">handler.ErrorHandler()</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.parseString" title="Link to this definition">¶</a></dt>
 | 
						|
<dd><p>Similar to <a class="reference internal" href="#xml.sax.parse" title="xml.sax.parse"><code class="xref py py-func docutils literal notranslate"><span class="pre">parse()</span></code></a>, but parses from a buffer <em>string</em> received as a
 | 
						|
parameter.  <em>string</em> must be a <a class="reference internal" href="stdtypes.html#str" title="str"><code class="xref py py-class docutils literal notranslate"><span class="pre">str</span></code></a> instance or a
 | 
						|
<a class="reference internal" href="../glossary.html#term-bytes-like-object"><span class="xref std std-term">bytes-like object</span></a>.</p>
 | 
						|
<div class="versionchanged">
 | 
						|
<p><span class="versionmodified changed">Changed in version 3.5: </span>Added support of <a class="reference internal" href="stdtypes.html#str" title="str"><code class="xref py py-class docutils literal notranslate"><span class="pre">str</span></code></a> instances.</p>
 | 
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</div>
 | 
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</dd></dl>
 | 
						|
 | 
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<p>A typical SAX application uses three kinds of objects: readers, handlers and
 | 
						|
input sources.  “Reader” in this context is another term for parser, i.e. some
 | 
						|
piece of code that reads the bytes or characters from the input source, and
 | 
						|
produces a sequence of events. The events then get distributed to the handler
 | 
						|
objects, i.e. the reader invokes a method on the handler.  A SAX application
 | 
						|
must therefore obtain a reader object, create or open the input sources, create
 | 
						|
the handlers, and connect these objects all together.  As the final step of
 | 
						|
preparation, the reader is called to parse the input. During parsing, methods on
 | 
						|
the handler objects are called based on structural and syntactic events from the
 | 
						|
input data.</p>
 | 
						|
<p>For these objects, only the interfaces are relevant; they are normally not
 | 
						|
instantiated by the application itself.  Since Python does not have an explicit
 | 
						|
notion of interface, they are formally introduced as classes, but applications
 | 
						|
may use implementations which do not inherit from the provided classes.  The
 | 
						|
<a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.InputSource" title="xml.sax.xmlreader.InputSource"><code class="xref py py-class docutils literal notranslate"><span class="pre">InputSource</span></code></a>, <a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.Locator" title="xml.sax.xmlreader.Locator"><code class="xref py py-class docutils literal notranslate"><span class="pre">Locator</span></code></a>,
 | 
						|
<code class="xref py py-class docutils literal notranslate"><span class="pre">Attributes</span></code>, <code class="xref py py-class docutils literal notranslate"><span class="pre">AttributesNS</span></code>,
 | 
						|
and <a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.XMLReader" title="xml.sax.xmlreader.XMLReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">XMLReader</span></code></a> interfaces are defined in the
 | 
						|
module <a class="reference internal" href="xml.sax.reader.html#module-xml.sax.xmlreader" title="xml.sax.xmlreader: Interface which SAX-compliant XML parsers must implement."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax.xmlreader</span></code></a>.  The handler interfaces are defined in
 | 
						|
<a class="reference internal" href="xml.sax.handler.html#module-xml.sax.handler" title="xml.sax.handler: Base classes for SAX event handlers."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax.handler</span></code></a>.  For convenience,
 | 
						|
<a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.InputSource" title="xml.sax.xmlreader.InputSource"><code class="xref py py-class docutils literal notranslate"><span class="pre">InputSource</span></code></a> (which is often
 | 
						|
instantiated directly) and the handler classes are also available from
 | 
						|
<a class="reference internal" href="#module-xml.sax" title="xml.sax: Package containing SAX2 base classes and convenience functions."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax</span></code></a>.  These interfaces are described below.</p>
 | 
						|
<p>In addition to these classes, <a class="reference internal" href="#module-xml.sax" title="xml.sax: Package containing SAX2 base classes and convenience functions."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax</span></code></a> provides the following exception
 | 
						|
classes.</p>
 | 
						|
<dl class="py exception">
 | 
						|
<dt class="sig sig-object py" id="xml.sax.SAXException">
 | 
						|
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">xml.sax.</span></span><span class="sig-name descname"><span class="pre">SAXException</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">msg</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">exception</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.SAXException" title="Link to this definition">¶</a></dt>
 | 
						|
<dd><p>Encapsulate an XML error or warning.  This class can contain basic error or
 | 
						|
warning information from either the XML parser or the application: it can be
 | 
						|
subclassed to provide additional functionality or to add localization.  Note
 | 
						|
that although the handlers defined in the
 | 
						|
<a class="reference internal" href="xml.sax.handler.html#xml.sax.handler.ErrorHandler" title="xml.sax.handler.ErrorHandler"><code class="xref py py-class docutils literal notranslate"><span class="pre">ErrorHandler</span></code></a> interface
 | 
						|
receive instances of this exception, it is not required to actually raise the
 | 
						|
exception — it is also useful as a container for information.</p>
 | 
						|
<p>When instantiated, <em>msg</em> should be a human-readable description of the error.
 | 
						|
The optional <em>exception</em> parameter, if given, should be <code class="docutils literal notranslate"><span class="pre">None</span></code> or an exception
 | 
						|
that was caught by the parsing code and is being passed along as information.</p>
 | 
						|
<p>This is the base class for the other SAX exception classes.</p>
 | 
						|
</dd></dl>
 | 
						|
 | 
						|
<dl class="py exception">
 | 
						|
<dt class="sig sig-object py" id="xml.sax.SAXParseException">
 | 
						|
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">xml.sax.</span></span><span class="sig-name descname"><span class="pre">SAXParseException</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">msg</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">exception</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">locator</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.SAXParseException" title="Link to this definition">¶</a></dt>
 | 
						|
<dd><p>Subclass of <a class="reference internal" href="#xml.sax.SAXException" title="xml.sax.SAXException"><code class="xref py py-exc docutils literal notranslate"><span class="pre">SAXException</span></code></a> raised on parse errors. Instances of this
 | 
						|
class are passed to the methods of the SAX
 | 
						|
<a class="reference internal" href="xml.sax.handler.html#xml.sax.handler.ErrorHandler" title="xml.sax.handler.ErrorHandler"><code class="xref py py-class docutils literal notranslate"><span class="pre">ErrorHandler</span></code></a> interface to provide information
 | 
						|
about the parse error.  This class supports the SAX
 | 
						|
<a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.Locator" title="xml.sax.xmlreader.Locator"><code class="xref py py-class docutils literal notranslate"><span class="pre">Locator</span></code></a> interface as well as the
 | 
						|
<a class="reference internal" href="#xml.sax.SAXException" title="xml.sax.SAXException"><code class="xref py py-class docutils literal notranslate"><span class="pre">SAXException</span></code></a> interface.</p>
 | 
						|
</dd></dl>
 | 
						|
 | 
						|
<dl class="py exception">
 | 
						|
<dt class="sig sig-object py" id="xml.sax.SAXNotRecognizedException">
 | 
						|
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">xml.sax.</span></span><span class="sig-name descname"><span class="pre">SAXNotRecognizedException</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">msg</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">exception</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.SAXNotRecognizedException" title="Link to this definition">¶</a></dt>
 | 
						|
<dd><p>Subclass of <a class="reference internal" href="#xml.sax.SAXException" title="xml.sax.SAXException"><code class="xref py py-exc docutils literal notranslate"><span class="pre">SAXException</span></code></a> raised when a SAX
 | 
						|
<a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.XMLReader" title="xml.sax.xmlreader.XMLReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">XMLReader</span></code></a> is
 | 
						|
confronted with an unrecognized feature or property.  SAX applications and
 | 
						|
extensions may use this class for similar purposes.</p>
 | 
						|
</dd></dl>
 | 
						|
 | 
						|
<dl class="py exception">
 | 
						|
<dt class="sig sig-object py" id="xml.sax.SAXNotSupportedException">
 | 
						|
<em class="property"><span class="k"><span class="pre">exception</span></span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">xml.sax.</span></span><span class="sig-name descname"><span class="pre">SAXNotSupportedException</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">msg</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">exception</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.SAXNotSupportedException" title="Link to this definition">¶</a></dt>
 | 
						|
<dd><p>Subclass of <a class="reference internal" href="#xml.sax.SAXException" title="xml.sax.SAXException"><code class="xref py py-exc docutils literal notranslate"><span class="pre">SAXException</span></code></a> raised when a SAX
 | 
						|
<a class="reference internal" href="xml.sax.reader.html#xml.sax.xmlreader.XMLReader" title="xml.sax.xmlreader.XMLReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">XMLReader</span></code></a> is asked to
 | 
						|
enable a feature that is not supported, or to set a property to a value that the
 | 
						|
implementation does not support.  SAX applications and extensions may use this
 | 
						|
class for similar purposes.</p>
 | 
						|
</dd></dl>
 | 
						|
 | 
						|
<div class="admonition seealso">
 | 
						|
<p class="admonition-title">See also</p>
 | 
						|
<dl class="simple">
 | 
						|
<dt><a class="reference external" href="http://www.saxproject.org/">SAX: The Simple API for XML</a></dt><dd><p>This site is the focal point for the definition of the SAX API.  It provides a
 | 
						|
Java implementation and online documentation.  Links to implementations and
 | 
						|
historical information are also available.</p>
 | 
						|
</dd>
 | 
						|
<dt>Module <a class="reference internal" href="xml.sax.handler.html#module-xml.sax.handler" title="xml.sax.handler: Base classes for SAX event handlers."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax.handler</span></code></a></dt><dd><p>Definitions of the interfaces for application-provided objects.</p>
 | 
						|
</dd>
 | 
						|
<dt>Module <a class="reference internal" href="xml.sax.utils.html#module-xml.sax.saxutils" title="xml.sax.saxutils: Convenience functions and classes for use with SAX."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax.saxutils</span></code></a></dt><dd><p>Convenience functions for use in SAX applications.</p>
 | 
						|
</dd>
 | 
						|
<dt>Module <a class="reference internal" href="xml.sax.reader.html#module-xml.sax.xmlreader" title="xml.sax.xmlreader: Interface which SAX-compliant XML parsers must implement."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax.xmlreader</span></code></a></dt><dd><p>Definitions of the interfaces for parser-provided objects.</p>
 | 
						|
</dd>
 | 
						|
</dl>
 | 
						|
</div>
 | 
						|
<section id="saxexception-objects">
 | 
						|
<span id="sax-exception-objects"></span><h2>SAXException Objects<a class="headerlink" href="#saxexception-objects" title="Link to this heading">¶</a></h2>
 | 
						|
<p>The <a class="reference internal" href="#xml.sax.SAXException" title="xml.sax.SAXException"><code class="xref py py-class docutils literal notranslate"><span class="pre">SAXException</span></code></a> exception class supports the following methods:</p>
 | 
						|
<dl class="py method">
 | 
						|
<dt class="sig sig-object py" id="xml.sax.SAXException.getMessage">
 | 
						|
<span class="sig-prename descclassname"><span class="pre">SAXException.</span></span><span class="sig-name descname"><span class="pre">getMessage</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.SAXException.getMessage" title="Link to this definition">¶</a></dt>
 | 
						|
<dd><p>Return a human-readable message describing the error condition.</p>
 | 
						|
</dd></dl>
 | 
						|
 | 
						|
<dl class="py method">
 | 
						|
<dt class="sig sig-object py" id="xml.sax.SAXException.getException">
 | 
						|
<span class="sig-prename descclassname"><span class="pre">SAXException.</span></span><span class="sig-name descname"><span class="pre">getException</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#xml.sax.SAXException.getException" title="Link to this definition">¶</a></dt>
 | 
						|
<dd><p>Return an encapsulated exception object, or <code class="docutils literal notranslate"><span class="pre">None</span></code>.</p>
 | 
						|
</dd></dl>
 | 
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 | 
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<li><a class="reference internal" href="#"><code class="xref py py-mod docutils literal notranslate"><span class="pre">xml.sax</span></code> — Support for SAX2 parsers</a><ul>
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