# html.parser --- Simple HTML and XHTML parser — Examples

> The following class implements a parser that will be used to illustrate more examples from html.parser import HTMLParser from html.entities import name2codepoint class MyHTMLParser(HTMLParser): def handle_starttag(self, tag, attrs): print("Start tag:", tag) for attr in attrs: print(" attr:", attr) >

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## Knowledge

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The following class implements a parser that will be used to illustrate more examples

from html.parser import HTMLParser from html.entities import name2codepoint

class MyHTMLParser(HTMLParser): def handle_starttag(self, tag, attrs): print("Start tag:", tag) for attr in attrs: print(" attr:", attr)

&gt;&gt;&gt; parser.feed('&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" ' ... '" Decl : DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "

Parsing an element with a few attributes and a title

&gt;&gt;&gt; parser.feed('') Start tag: img attr: ('src', 'python-logo.png') attr: ('alt', 'The Python logo') &gt;&gt;&gt; &gt;&gt;&gt; parser.feed('Python') Start tag: h1 Data : Python End tag : h1

The content of elements like script and style is returned as is, without further parsing

&gt;&gt;&gt; parser.feed('#python { color: green }') Start tag: style attr: ('type', 'text/css') Data : #python { color: green } End tag : style

&gt;&gt;&gt; parser.feed('' ... 'alert("hello! &amp;#9786;");') Start tag: script attr: ('type', 'text/javascript') Data : alert("hello! &amp;#9786;"); End tag : script

Attribute names are converted to lowercase, quotes from attribute values removed, and None is returned as value for empty attributes (such as checked)

&gt;&gt;&gt; parser.feed("") Start tag: input attr: ('type', 'checkbox') attr: ('checked', None) attr: ('required', '') attr: ('disabled', 'disabled')

&gt;&gt;&gt; parser.feed('' ... 'IE-specific content') Comment : a comment Comment : [if IE 9]&gt;IE-specific content&lt;![endif]

Parsing named and numeric character references and converting them to the correct char (note: these 3 references are all equivalent to '&gt;')

&gt;&gt;&gt; parser = MyHTMLParser() &gt;&gt;&gt; parser.feed('&amp;gt;&amp;#62;&amp;#x3E;') Data : &gt;&gt;&gt;

&gt;&gt;&gt; parser = MyHTMLParser(convert_charrefs=False) &gt;&gt;&gt; parser.feed('&amp;gt;&amp;#62;&amp;#x3E;') Named ent: &gt; Num ent : &gt; Num ent : &gt;

Feeding incomplete chunks to ~HTMLParser.feed works, but ~HTMLParser.handle_data might be called more than once if convert_charrefs is false

&gt;&gt;&gt; for chunk in ['buff', 'ered', ' text']: ... parser.feed(chunk) ... Start tag: span Data : buff Data : ered Data : text End tag : span

Parsing invalid HTML (e.g. unquoted attributes) also works

&gt;&gt;&gt; parser.feed('tag soup') Start tag: p Start tag: a attr: ('class', 'link') attr: ('href', '#main') Data : tag soup End tag : p End tag : a

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