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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>19.1. HTMLParser — Simple HTML and XHTML parser — Python 2.7.5 documentation</title> <link rel="stylesheet" href="../_static/default.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '2.7.5', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 2.7.5 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="top" title="Python 2.7.5 documentation" href="../index.html" /> <link rel="up" title="19. Structured Markup Processing Tools" href="markup.html" /> <link rel="next" title="19.2. sgmllib — Simple SGML parser" href="sgmllib.html" /> <link rel="prev" title="19. Structured Markup Processing Tools" href="markup.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head> <body> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="sgmllib.html" title="19.2. sgmllib — Simple SGML parser" accesskey="N">next</a> |</li> <li class="right" > <a href="markup.html" title="19. 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Structured Markup Processing Tools</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <div class="section" id="module-HTMLParser"> <span id="htmlparser-simple-html-and-xhtml-parser"></span><h1>19.1. <a class="reference internal" href="#module-HTMLParser" title="HTMLParser: A simple parser that can handle HTML and XHTML."><tt class="xref py py-mod docutils literal"><span class="pre">HTMLParser</span></tt></a> — Simple HTML and XHTML parser<a class="headerlink" href="#module-HTMLParser" title="Permalink to this headline">¶</a></h1> <div class="admonition note"> <p class="first admonition-title">Note</p> <p class="last">The <a class="reference internal" href="#module-HTMLParser" title="HTMLParser: A simple parser that can handle HTML and XHTML."><tt class="xref py py-mod docutils literal"><span class="pre">HTMLParser</span></tt></a> module has been renamed to <tt class="xref py py-mod docutils literal"><span class="pre">html.parser</span></tt> in Python 3. The <a class="reference internal" href="../glossary.html#term-to3"><em class="xref std std-term">2to3</em></a> tool will automatically adapt imports when converting your sources to Python 3.</p> </div> <p class="versionadded"> <span class="versionmodified">New in version 2.2.</span></p> <p id="index-0"><strong>Source code:</strong> <a class="reference external" href="http://hg.python.org/cpython/file/2.7/Lib/HTMLParser.py">Lib/HTMLParser.py</a></p> <hr class="docutils" /> <p>This module defines a class <a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> which serves as the basis for parsing text files formatted in HTML (HyperText Mark-up Language) and XHTML. Unlike the parser in <a class="reference internal" href="htmllib.html#module-htmllib" title="htmllib: A parser for HTML documents. (deprecated)"><tt class="xref py py-mod docutils literal"><span class="pre">htmllib</span></tt></a>, this parser is not based on the SGML parser in <a class="reference internal" href="sgmllib.html#module-sgmllib" title="sgmllib: Only as much of an SGML parser as needed to parse HTML. (deprecated)"><tt class="xref py py-mod docutils literal"><span class="pre">sgmllib</span></tt></a>.</p> <dl class="class"> <dt id="HTMLParser.HTMLParser"> <em class="property">class </em><tt class="descclassname">HTMLParser.</tt><tt class="descname">HTMLParser</tt><a class="headerlink" href="#HTMLParser.HTMLParser" title="Permalink to this definition">¶</a></dt> <dd><p>An <a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> instance is fed HTML data and calls handler methods when start tags, end tags, text, comments, and other markup elements are encountered. The user should subclass <a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> and override its methods to implement the desired behavior.</p> <p>The <a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> class is instantiated without arguments.</p> <p>Unlike the parser in <a class="reference internal" href="htmllib.html#module-htmllib" title="htmllib: A parser for HTML documents. (deprecated)"><tt class="xref py py-mod docutils literal"><span class="pre">htmllib</span></tt></a>, this parser does not check that end tags match start tags or call the end-tag handler for elements which are closed implicitly by closing an outer element.</p> </dd></dl> <p>An exception is defined as well:</p> <dl class="exception"> <dt id="HTMLParser.HTMLParseError"> <em class="property">exception </em><tt class="descclassname">HTMLParser.</tt><tt class="descname">HTMLParseError</tt><a class="headerlink" href="#HTMLParser.HTMLParseError" title="Permalink to this definition">¶</a></dt> <dd><p><a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> is able to handle broken markup, but in some cases it might raise this exception when it encounters an error while parsing. This exception provides three attributes: <tt class="xref py py-attr docutils literal"><span class="pre">msg</span></tt> is a brief message explaining the error, <tt class="xref py py-attr docutils literal"><span class="pre">lineno</span></tt> is the number of the line on which the broken construct was detected, and <tt class="xref py py-attr docutils literal"><span class="pre">offset</span></tt> is the number of characters into the line at which the construct starts.</p> </dd></dl> <div class="section" id="example-html-parser-application"> <h2>19.1.1. Example HTML Parser Application<a class="headerlink" href="#example-html-parser-application" title="Permalink to this headline">¶</a></h2> <p>As a basic example, below is a simple HTML parser that uses the <a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> class to print out start tags, end tags and data as they are encountered:</p> <div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">HTMLParser</span> <span class="kn">import</span> <span class="n">HTMLParser</span> <span class="c"># create a subclass and override the handler methods</span> <span class="k">class</span> <span class="nc">MyHTMLParser</span><span class="p">(</span><span class="n">HTMLParser</span><span class="p">):</span> <span class="k">def</span> <span class="nf">handle_starttag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">tag</span><span class="p">,</span> <span class="n">attrs</span><span class="p">):</span> <span class="k">print</span> <span class="s">"Encountered a start tag:"</span><span class="p">,</span> <span class="n">tag</span> <span class="k">def</span> <span class="nf">handle_endtag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">tag</span><span class="p">):</span> <span class="k">print</span> <span class="s">"Encountered an end tag :"</span><span class="p">,</span> <span class="n">tag</span> <span class="k">def</span> <span class="nf">handle_data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span> <span class="k">print</span> <span class="s">"Encountered some data :"</span><span class="p">,</span> <span class="n">data</span> <span class="c"># instantiate the parser and fed it some HTML</span> <span class="n">parser</span> <span class="o">=</span> <span class="n">MyHTMLParser</span><span class="p">()</span> <span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'<html><head><title>Test</title></head>'</span> <span class="s">'<body><h1>Parse me!</h1></body></html>'</span><span class="p">)</span> </pre></div> </div> <p>The output will then be:</p> <div class="highlight-python"><pre>Encountered a start tag: html Encountered a start tag: head Encountered a start tag: title Encountered some data : Test Encountered an end tag : title Encountered an end tag : head Encountered a start tag: body Encountered a start tag: h1 Encountered some data : Parse me! Encountered an end tag : h1 Encountered an end tag : body Encountered an end tag : html</pre> </div> </div> <div class="section" id="htmlparser-methods"> <h2>19.1.2. <a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> Methods<a class="headerlink" href="#htmlparser-methods" title="Permalink to this headline">¶</a></h2> <p><a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> instances have the following methods:</p> <dl class="method"> <dt id="HTMLParser.HTMLParser.feed"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">feed</tt><big>(</big><em>data</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.feed" title="Permalink to this definition">¶</a></dt> <dd><p>Feed some text to the parser. It is processed insofar as it consists of complete elements; incomplete data is buffered until more data is fed or <a class="reference internal" href="#HTMLParser.HTMLParser.close" title="HTMLParser.HTMLParser.close"><tt class="xref py py-meth docutils literal"><span class="pre">close()</span></tt></a> is called. <em>data</em> can be either <a class="reference internal" href="functions.html#unicode" title="unicode"><tt class="xref py py-class docutils literal"><span class="pre">unicode</span></tt></a> or <a class="reference internal" href="functions.html#str" title="str"><tt class="xref py py-class docutils literal"><span class="pre">str</span></tt></a>, but passing <a class="reference internal" href="functions.html#unicode" title="unicode"><tt class="xref py py-class docutils literal"><span class="pre">unicode</span></tt></a> is advised.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.close"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">close</tt><big>(</big><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.close" title="Permalink to this definition">¶</a></dt> <dd><p>Force processing of all buffered data as if it were followed by an end-of-file mark. This method may be redefined by a derived class to define additional processing at the end of the input, but the redefined version should always call the <a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> base class method <a class="reference internal" href="#HTMLParser.HTMLParser.close" title="HTMLParser.HTMLParser.close"><tt class="xref py py-meth docutils literal"><span class="pre">close()</span></tt></a>.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.reset"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">reset</tt><big>(</big><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.reset" title="Permalink to this definition">¶</a></dt> <dd><p>Reset the instance. Loses all unprocessed data. This is called implicitly at instantiation time.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.getpos"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">getpos</tt><big>(</big><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.getpos" title="Permalink to this definition">¶</a></dt> <dd><p>Return current line number and offset.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.get_starttag_text"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">get_starttag_text</tt><big>(</big><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.get_starttag_text" title="Permalink to this definition">¶</a></dt> <dd><p>Return the text of the most recently opened start tag. This should not normally be needed for structured processing, but may be useful in dealing with HTML “as deployed” or for re-generating input with minimal changes (whitespace between attributes can be preserved, etc.).</p> </dd></dl> <p>The following methods are called when data or markup elements are encountered and they are meant to be overridden in a subclass. The base class implementations do nothing (except for <a class="reference internal" href="#HTMLParser.HTMLParser.handle_startendtag" title="HTMLParser.HTMLParser.handle_startendtag"><tt class="xref py py-meth docutils literal"><span class="pre">handle_startendtag()</span></tt></a>):</p> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_starttag"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_starttag</tt><big>(</big><em>tag</em>, <em>attrs</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_starttag" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called to handle the start of a tag (e.g. <tt class="docutils literal"><span class="pre"><div</span> <span class="pre">id="main"></span></tt>).</p> <p>The <em>tag</em> argument is the name of the tag converted to lower case. The <em>attrs</em> argument is a list of <tt class="docutils literal"><span class="pre">(name,</span> <span class="pre">value)</span></tt> pairs containing the attributes found inside the tag’s <tt class="docutils literal"><span class="pre"><></span></tt> brackets. The <em>name</em> will be translated to lower case, and quotes in the <em>value</em> have been removed, and character and entity references have been replaced.</p> <p>For instance, for the tag <tt class="docutils literal"><span class="pre"><A</span> <span class="pre">HREF="http://www.cwi.nl/"></span></tt>, this method would be called as <tt class="docutils literal"><span class="pre">handle_starttag('a',</span> <span class="pre">[('href',</span> <span class="pre">'http://www.cwi.nl/')])</span></tt>.</p> <p class="versionchanged"> <span class="versionmodified">Changed in version 2.6: </span>All entity references from <a class="reference internal" href="htmllib.html#module-htmlentitydefs" title="htmlentitydefs: Definitions of HTML general entities."><tt class="xref py py-mod docutils literal"><span class="pre">htmlentitydefs</span></tt></a> are now replaced in the attribute values.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_endtag"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_endtag</tt><big>(</big><em>tag</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_endtag" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called to handle the end tag of an element (e.g. <tt class="docutils literal"><span class="pre"></div></span></tt>).</p> <p>The <em>tag</em> argument is the name of the tag converted to lower case.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_startendtag"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_startendtag</tt><big>(</big><em>tag</em>, <em>attrs</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_startendtag" title="Permalink to this definition">¶</a></dt> <dd><p>Similar to <a class="reference internal" href="#HTMLParser.HTMLParser.handle_starttag" title="HTMLParser.HTMLParser.handle_starttag"><tt class="xref py py-meth docutils literal"><span class="pre">handle_starttag()</span></tt></a>, but called when the parser encounters an XHTML-style empty tag (<tt class="docutils literal"><span class="pre"><img</span> <span class="pre">...</span> <span class="pre">/></span></tt>). This method may be overridden by subclasses which require this particular lexical information; the default implementation simply calls <a class="reference internal" href="#HTMLParser.HTMLParser.handle_starttag" title="HTMLParser.HTMLParser.handle_starttag"><tt class="xref py py-meth docutils literal"><span class="pre">handle_starttag()</span></tt></a> and <a class="reference internal" href="#HTMLParser.HTMLParser.handle_endtag" title="HTMLParser.HTMLParser.handle_endtag"><tt class="xref py py-meth docutils literal"><span class="pre">handle_endtag()</span></tt></a>.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_data"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_data</tt><big>(</big><em>data</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_data" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called to process arbitrary data (e.g. text nodes and the content of <tt class="docutils literal"><span class="pre"><script>...</script></span></tt> and <tt class="docutils literal"><span class="pre"><style>...</style></span></tt>).</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_entityref"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_entityref</tt><big>(</big><em>name</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_entityref" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called to process a named character reference of the form <tt class="docutils literal"><span class="pre">&name;</span></tt> (e.g. <tt class="docutils literal"><span class="pre">&gt;</span></tt>), where <em>name</em> is a general entity reference (e.g. <tt class="docutils literal"><span class="pre">'gt'</span></tt>).</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_charref"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_charref</tt><big>(</big><em>name</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_charref" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called to process decimal and hexadecimal numeric character references of the form <tt class="docutils literal"><span class="pre">&#NNN;</span></tt> and <tt class="docutils literal"><span class="pre">&#xNNN;</span></tt>. For example, the decimal equivalent for <tt class="docutils literal"><span class="pre">&gt;</span></tt> is <tt class="docutils literal"><span class="pre">&#62;</span></tt>, whereas the hexadecimal is <tt class="docutils literal"><span class="pre">&#x3E;</span></tt>; in this case the method will receive <tt class="docutils literal"><span class="pre">'62'</span></tt> or <tt class="docutils literal"><span class="pre">'x3E'</span></tt>.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_comment"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_comment</tt><big>(</big><em>data</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_comment" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called when a comment is encountered (e.g. <tt class="docutils literal"><span class="pre"><!--comment--></span></tt>).</p> <p>For example, the comment <tt class="docutils literal"><span class="pre"><!--</span> <span class="pre">comment</span> <span class="pre">--></span></tt> will cause this method to be called with the argument <tt class="docutils literal"><span class="pre">'</span> <span class="pre">comment</span> <span class="pre">'</span></tt>.</p> <p>The content of Internet Explorer conditional comments (condcoms) will also be sent to this method, so, for <tt class="docutils literal"><span class="pre"><!--[if</span> <span class="pre">IE</span> <span class="pre">9]>IE9-specific</span> <span class="pre">content<![endif]--></span></tt>, this method will receive <tt class="docutils literal"><span class="pre">'[if</span> <span class="pre">IE</span> <span class="pre">9]>IE-specific</span> <span class="pre">content<![endif]'</span></tt>.</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_decl"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_decl</tt><big>(</big><em>decl</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_decl" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called to handle an HTML doctype declaration (e.g. <tt class="docutils literal"><span class="pre"><!DOCTYPE</span> <span class="pre">html></span></tt>).</p> <p>The <em>decl</em> parameter will be the entire contents of the declaration inside the <tt class="docutils literal"><span class="pre"><!...></span></tt> markup (e.g. <tt class="docutils literal"><span class="pre">'DOCTYPE</span> <span class="pre">html'</span></tt>).</p> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.handle_pi"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">handle_pi</tt><big>(</big><em>data</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.handle_pi" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called when a processing instruction is encountered. The <em>data</em> parameter will contain the entire processing instruction. For example, for the processing instruction <tt class="docutils literal"><span class="pre"><?proc</span> <span class="pre">color='red'></span></tt>, this method would be called as <tt class="docutils literal"><span class="pre">handle_pi("proc</span> <span class="pre">color='red'")</span></tt>.</p> <div class="admonition note"> <p class="first admonition-title">Note</p> <p class="last">The <a class="reference internal" href="#HTMLParser.HTMLParser" title="HTMLParser.HTMLParser"><tt class="xref py py-class docutils literal"><span class="pre">HTMLParser</span></tt></a> class uses the SGML syntactic rules for processing instructions. An XHTML processing instruction using the trailing <tt class="docutils literal"><span class="pre">'?'</span></tt> will cause the <tt class="docutils literal"><span class="pre">'?'</span></tt> to be included in <em>data</em>.</p> </div> </dd></dl> <dl class="method"> <dt id="HTMLParser.HTMLParser.unknown_decl"> <tt class="descclassname">HTMLParser.</tt><tt class="descname">unknown_decl</tt><big>(</big><em>data</em><big>)</big><a class="headerlink" href="#HTMLParser.HTMLParser.unknown_decl" title="Permalink to this definition">¶</a></dt> <dd><p>This method is called when an unrecognized declaration is read by the parser.</p> <p>The <em>data</em> parameter will be the entire contents of the declaration inside the <tt class="docutils literal"><span class="pre"><![...]></span></tt> markup. It is sometimes useful to be overridden by a derived class.</p> </dd></dl> </div> <div class="section" id="examples"> <span id="htmlparser-examples"></span><h2>19.1.3. Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h2> <p>The following class implements a parser that will be used to illustrate more examples:</p> <div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">HTMLParser</span> <span class="kn">import</span> <span class="n">HTMLParser</span> <span class="kn">from</span> <span class="nn">htmlentitydefs</span> <span class="kn">import</span> <span class="n">name2codepoint</span> <span class="k">class</span> <span class="nc">MyHTMLParser</span><span class="p">(</span><span class="n">HTMLParser</span><span class="p">):</span> <span class="k">def</span> <span class="nf">handle_starttag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">tag</span><span class="p">,</span> <span class="n">attrs</span><span class="p">):</span> <span class="k">print</span> <span class="s">"Start tag:"</span><span class="p">,</span> <span class="n">tag</span> <span class="k">for</span> <span class="n">attr</span> <span class="ow">in</span> <span class="n">attrs</span><span class="p">:</span> <span class="k">print</span> <span class="s">" attr:"</span><span class="p">,</span> <span class="n">attr</span> <span class="k">def</span> <span class="nf">handle_endtag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">tag</span><span class="p">):</span> <span class="k">print</span> <span class="s">"End tag :"</span><span class="p">,</span> <span class="n">tag</span> <span class="k">def</span> <span class="nf">handle_data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span> <span class="k">print</span> <span class="s">"Data :"</span><span class="p">,</span> <span class="n">data</span> <span class="k">def</span> <span class="nf">handle_comment</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span> <span class="k">print</span> <span class="s">"Comment :"</span><span class="p">,</span> <span class="n">data</span> <span class="k">def</span> <span class="nf">handle_entityref</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> <span class="n">c</span> <span class="o">=</span> <span class="nb">unichr</span><span class="p">(</span><span class="n">name2codepoint</span><span class="p">[</span><span class="n">name</span><span class="p">])</span> <span class="k">print</span> <span class="s">"Named ent:"</span><span class="p">,</span> <span class="n">c</span> <span class="k">def</span> <span class="nf">handle_charref</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> <span class="k">if</span> <span class="n">name</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s">'x'</span><span class="p">):</span> <span class="n">c</span> <span class="o">=</span> <span class="nb">unichr</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">name</span><span class="p">[</span><span class="mi">1</span><span class="p">:],</span> <span class="mi">16</span><span class="p">))</span> <span class="k">else</span><span class="p">:</span> <span class="n">c</span> <span class="o">=</span> <span class="nb">unichr</span><span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">name</span><span class="p">))</span> <span class="k">print</span> <span class="s">"Num ent :"</span><span class="p">,</span> <span class="n">c</span> <span class="k">def</span> <span class="nf">handle_decl</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span> <span class="k">print</span> <span class="s">"Decl :"</span><span class="p">,</span> <span class="n">data</span> <span class="n">parser</span> <span class="o">=</span> <span class="n">MyHTMLParser</span><span class="p">()</span> </pre></div> </div> <p>Parsing a doctype:</p> <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" '</span> <span class="gp">... </span> <span class="s">'"http://www.w3.org/TR/html4/strict.dtd">'</span><span class="p">)</span> <span class="go">Decl : DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"</span> </pre></div> </div> <p>Parsing an element with a few attributes and a title:</p> <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'<img src="python-logo.png" alt="The Python logo">'</span><span class="p">)</span> <span class="go">Start tag: img</span> <span class="go"> attr: ('src', 'python-logo.png')</span> <span class="go"> attr: ('alt', 'The Python logo')</span> <span class="go">>>></span> <span class="gp">>>> </span><span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'<h1>Python</h1>'</span><span class="p">)</span> <span class="go">Start tag: h1</span> <span class="go">Data : Python</span> <span class="go">End tag : h1</span> </pre></div> </div> <p>The content of <tt class="docutils literal"><span class="pre">script</span></tt> and <tt class="docutils literal"><span class="pre">style</span></tt> elements is returned as is, without further parsing:</p> <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'<style type="text/css">#python { color: green }</style>'</span><span class="p">)</span> <span class="go">Start tag: style</span> <span class="go"> attr: ('type', 'text/css')</span> <span class="go">Data : #python { color: green }</span> <span class="go">End tag : style</span> <span class="go">>>></span> <span class="gp">>>> </span><span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'<script type="text/javascript">'</span> <span class="gp">... </span> <span class="s">'alert("<strong>hello!</strong>");</script>'</span><span class="p">)</span> <span class="go">Start tag: script</span> <span class="go"> attr: ('type', 'text/javascript')</span> <span class="go">Data : alert("<strong>hello!</strong>");</span> <span class="go">End tag : script</span> </pre></div> </div> <p>Parsing comments:</p> <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'<!-- a comment -->'</span> <span class="gp">... </span> <span class="s">'<!--[if IE 9]>IE-specific content<![endif]-->'</span><span class="p">)</span> <span class="go">Comment : a comment</span> <span class="go">Comment : [if IE 9]>IE-specific content<![endif]</span> </pre></div> </div> <p>Parsing named and numeric character references and converting them to the correct char (note: these 3 references are all equivalent to <tt class="docutils literal"><span class="pre">'>'</span></tt>):</p> <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'&gt;&#62;&#x3E;'</span><span class="p">)</span> <span class="go">Named ent: ></span> <span class="go">Num ent : ></span> <span class="go">Num ent : ></span> </pre></div> </div> <p>Feeding incomplete chunks to <a class="reference internal" href="#HTMLParser.HTMLParser.feed" title="HTMLParser.HTMLParser.feed"><tt class="xref py py-meth docutils literal"><span class="pre">feed()</span></tt></a> works, but <a class="reference internal" href="#HTMLParser.HTMLParser.handle_data" title="HTMLParser.HTMLParser.handle_data"><tt class="xref py py-meth docutils literal"><span class="pre">handle_data()</span></tt></a> might be called more than once:</p> <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="k">for</span> <span class="n">chunk</span> <span class="ow">in</span> <span class="p">[</span><span class="s">'<sp'</span><span class="p">,</span> <span class="s">'an>buff'</span><span class="p">,</span> <span class="s">'ered '</span><span class="p">,</span> <span class="s">'text</s'</span><span class="p">,</span> <span class="s">'pan>'</span><span class="p">]:</span> <span class="gp">... </span> <span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="n">chunk</span><span class="p">)</span> <span class="gp">...</span> <span class="go">Start tag: span</span> <span class="go">Data : buff</span> <span class="go">Data : ered</span> <span class="go">Data : text</span> <span class="go">End tag : span</span> </pre></div> </div> <p>Parsing invalid HTML (e.g. unquoted attributes) also works:</p> <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">parser</span><span class="o">.</span><span class="n">feed</span><span class="p">(</span><span class="s">'<p><a class=link href=#main>tag soup</p ></a>'</span><span class="p">)</span> <span class="go">Start tag: p</span> <span class="go">Start tag: a</span> <span class="go"> attr: ('class', 'link')</span> <span class="go"> attr: ('href', '#main')</span> <span class="go">Data : tag soup</span> <span class="go">End tag : p</span> <span class="go">End tag : a</span> </pre></div> </div> </div> </div> </div> </div> </div> <div class="sphinxsidebar"> <div class="sphinxsidebarwrapper"> <h3><a href="../contents.html">Table Of Contents</a></h3> <ul> <li><a class="reference internal" href="#">19.1. <tt class="docutils literal"><span class="pre">HTMLParser</span></tt> — Simple HTML and XHTML parser</a><ul> <li><a class="reference internal" href="#example-html-parser-application">19.1.1. Example HTML Parser Application</a></li> <li><a class="reference internal" href="#htmlparser-methods">19.1.2. <tt class="docutils literal"><span class="pre">HTMLParser</span></tt> Methods</a></li> <li><a class="reference internal" href="#examples">19.1.3. Examples</a></li> </ul> </li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="markup.html" title="previous chapter">19. Structured Markup Processing Tools</a></p> <h4>Next topic</h4> <p class="topless"><a href="sgmllib.html" title="next chapter">19.2. <tt class="docutils literal"><span class="pre">sgmllib</span></tt> — Simple SGML parser</a></p> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../bugs.html">Report a Bug</a></li> <li><a href="../_sources/library/htmlparser.txt" rel="nofollow">Show Source</a></li> </ul> <div id="searchbox" style="display: none"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <input type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> <p class="searchtip" style="font-size: 90%"> Enter search terms or a module, class or function name. </p> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="sgmllib.html" title="19.2. sgmllib — Simple SGML parser" >next</a> |</li> <li class="right" > <a href="markup.html" title="19. 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