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<a href="lxml-module.html">Package lxml</a> ::
<a href="lxml.builder-module.html">Module builder</a> ::
Class ElementMaker
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class ElementMaker</h1><p class="nomargin-top"><span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker">source code</a></span></p>
<pre class="base-tree">
object --+
|
<strong class="uidshort">ElementMaker</strong>
</pre>
<hr />
<p>Element generator factory.</p>
<p>Unlike the ordinary Element factory, the E factory allows you to pass in
more than just a tag and some optional attributes; you can also pass in
text and other elements. The text is added as either text or tail
attributes, and elements are inserted at the right spot. Some small
examples:</p>
<pre class="rst-literal-block">
>>> from lxml import etree as ET
>>> from lxml.builder import E
>>> ET.tostring(E("tag"))
'<tag/>'
>>> ET.tostring(E("tag", "text"))
'<tag>text</tag>'
>>> ET.tostring(E("tag", "text", key="value"))
'<tag key="value">text</tag>'
>>> ET.tostring(E("tag", E("subtag", "text"), "tail"))
'<tag><subtag>text</subtag>tail</tag>'
</pre>
<p>For simple tags, the factory also allows you to write <tt class="rst-docutils literal"><span class="pre">E.tag(...)</span></tt> instead
of <tt class="rst-docutils literal"><span class="pre">E('tag',</span> <span class="pre">...)</span></tt>:</p>
<pre class="rst-literal-block">
>>> ET.tostring(E.tag())
'<tag/>'
>>> ET.tostring(E.tag("text"))
'<tag>text</tag>'
>>> ET.tostring(E.tag(E.subtag("text"), "tail"))
'<tag><subtag>text</subtag>tail</tag>'
</pre>
<p>Here's a somewhat larger example; this shows how to generate HTML
documents, using a mix of prepared factory functions for inline elements,
nested <tt class="rst-docutils literal">E.tag</tt> calls, and embedded XHTML fragments:</p>
<pre class="rst-literal-block">
# some common inline elements
A = E.a
I = E.i
B = E.b
def CLASS(v):
# helper function, 'class' is a reserved word
return {'class': v}
page = (
E.html(
E.head(
E.title("This is a sample document")
),
E.body(
E.h1("Hello!", CLASS("title")),
E.p("This is a paragraph with ", B("bold"), " text in it!"),
E.p("This is another paragraph, with a ",
A("link", href="http://www.python.org"), "."),
E.p("Here are some reserved characters: <spam&egg>."),
ET.XML("<p>And finally, here is an embedded XHTML fragment.</p>"),
)
)
)
print ET.tostring(page)
</pre>
<p>Here's a prettyprinted version of the output from the above script:</p>
<pre class="rst-literal-block">
<html>
<head>
<title>This is a sample document</title>
</head>
<body>
<h1 class="title">Hello!</h1>
<p>This is a paragraph with <b>bold</b> text in it!</p>
<p>This is another paragraph, with <a href="http://www.python.org">link</a>.</p>
<p>Here are some reserved characters: &lt;spam&amp;egg&gt;.</p>
<p>And finally, here is an embedded XHTML fragment.</p>
</body>
</html>
</pre>
<p>For namespace support, you can pass a namespace map (<tt class="rst-docutils literal">nsmap</tt>)
and/or a specific target <tt class="rst-docutils literal">namespace</tt> to the ElementMaker class:</p>
<pre class="rst-literal-block">
>>> E = ElementMaker(namespace="http://my.ns/")
>>> print(ET.tostring( E.test ))
<test xmlns="http://my.ns/"/>
>>> E = ElementMaker(namespace="http://my.ns/", nsmap={'p':'http://my.ns/'})
>>> print(ET.tostring( E.test ))
<p:test xmlns:p="http://my.ns/"/>
</pre>
<!-- ==================== INSTANCE METHODS ==================== -->
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<td><span class="summary-sig"><a href="lxml.builder.ElementMaker-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">typemap</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">namespace</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">nsmap</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">makeelement</span>=<span class="summary-sig-default">None</span>)</span><br />
x.__init__(...) initializes x; see help(type(x)) for signature</td>
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<td><span class="summary-sig"><a name="__call__"></a><span class="summary-sig-name">__call__</span>(<span class="summary-sig-arg">x</span>,
<span class="summary-sig-arg">...</span>)</span><br />
x(...)</td>
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<span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker.__call__">source code</a></span>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a name="__getattr__"></a><span class="summary-sig-name">__getattr__</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">tag</span>)</span></td>
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<span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker.__getattr__">source code</a></span>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="lxml.builder.ElementMaker-class.html#__getattribute__" class="summary-sig-name">__getattribute__</a>(<span class="summary-sig-arg">...</span>)</span><br />
x.__getattribute__('name') <==> x.name</td>
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<span class="summary-type">a new object with type S, a subtype of T</span>
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<td><span class="summary-sig"><a href="lxml.builder.ElementMaker-class.html#__new__" class="summary-sig-name">__new__</a>(<span class="summary-sig-arg">T</span>,
<span class="summary-sig-arg">S</span>,
<span class="summary-sig-arg">...</span>)</span></td>
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<span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker.__new__">source code</a></span>
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<span class="summary-type"> </span>
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<tr>
<td><span class="summary-sig"><a href="lxml.builder.ElementMaker-class.html#__reduce__" class="summary-sig-name">__reduce__</a>(<span class="summary-sig-arg">...</span>)</span><br />
helper for pickle</td>
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<span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker.__reduce__">source code</a></span>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a name="__setstate__"></a><span class="summary-sig-name">__setstate__</span>(<span class="summary-sig-arg">...</span>)</span></td>
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<span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker.__setstate__">source code</a></span>
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<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__delattr__</code>,
<code>__format__</code>,
<code>__hash__</code>,
<code>__reduce_ex__</code>,
<code>__repr__</code>,
<code>__setattr__</code>,
<code>__sizeof__</code>,
<code>__str__</code>,
<code>__subclasshook__</code>
</p>
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<!-- ==================== PROPERTIES ==================== -->
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<a name="_makeelement"></a><span class="summary-name">_makeelement</span>
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<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__class__</code>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">typemap</span>=<span class="sig-default">None</span>,
<span class="sig-arg">namespace</span>=<span class="sig-default">None</span>,
<span class="sig-arg">nsmap</span>=<span class="sig-default">None</span>,
<span class="sig-arg">makeelement</span>=<span class="sig-default">None</span>)</span>
<br /><em class="fname">(Constructor)</em>
</h3>
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x.__init__(...) initializes x; see help(type(x)) for signature
<dl class="fields">
<dt>Overrides:
object.__init__
</dt>
</dl>
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<a name="__getattribute__"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__getattribute__</span>(<span class="sig-arg">...</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker.__getattribute__">source code</a></span>
</td>
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x.__getattribute__('name') <==> x.name
<dl class="fields">
<dt>Overrides:
object.__getattribute__
</dt>
</dl>
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<a name="__new__"></a>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__new__</span>(<span class="sig-arg">T</span>,
<span class="sig-arg">S</span>,
<span class="sig-arg">...</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker.__new__">source code</a></span>
</td>
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<dl class="fields">
<dt>Returns: a new object with type S, a subtype of T</dt>
<dt>Overrides:
object.__new__
</dt>
</dl>
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<a name="__reduce__"></a>
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cellspacing="0" width="100%" bgcolor="white">
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__reduce__</span>(<span class="sig-arg">...</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="lxml.builder-pysrc.html#ElementMaker.__reduce__">source code</a></span>
</td>
</tr></table>
helper for pickle
<dl class="fields">
<dt>Overrides:
object.__reduce__
<dd><em class="note">(inherited documentation)</em></dd>
</dt>
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