XML (and XHTML) Generation
==========================
The elements generator lets you easily create snippets of XML or XHTML:
>>> from cybertools.xml.element import elements as e
>>> doc = e.html(
... e.head(e.title(u'Page Title')),
... e.body(
... e.div(u'The top bar', class_=u'top'),
... e.div(u'The body stuff', class_=u'body'),
... ))
>>> print doc.render()
<html>
<head>
<title>
Page Title
</title>
</head>
<body>
<div class="top">
The top bar
</div>
<div class="body">
The body stuff
</div>
</body>
</html>
An XML element thus created may be converted to an ElementTree (the standard
implementation in fact uses an lxml.etree structure as its basis):
>>> doc.renderTree()
'<html><head><title>Page Title</title></head><body><div class="top">The top bar</div><div class="body">The body stuff</div></body></html>'
>>> tree = doc.makeTree()
>>> tree.findtext('head/title')
'Page Title'
>>> xml = ('<html><head><title>Page Title</title></head><body>'
... '<div class="top">The top bar</div>'
... '<div class="body">The body stuff</div></body></html>')
>>> from cybertools.xml.element import fromXML
>>> doc = fromXML(xml)
>>> print doc.render()
<html>
<head>
<title>
Page Title
</title>
</head>
<body>
<div class="top">
The top bar
</div>
<div class="body">
The body stuff
</div>
</body>
</html>
Alternative Notation
--------------------
We can also create such a structure by successively adding elements
just by accessing an element's attributes:
>>> doc = e.html
>>> dummy = doc.head.title(u'Page Title')
>>> body = doc.body
>>> div1 = body.div(u'The top bar', class_=u'top')
>>> div2 = body.div(u'The body stuff', class_=u'body')
>>> print doc.render()
<html>
<head>
<title>
Page Title
</title>
</head>
<body>
<div class="top">
The top bar
</div>
<div class="body">
The body stuff
</div>
</body>
</html>
>>> for text in (u'Welcome', u'home'):
... p = div2.p(text, style='font-size: 80%;')
>>> print doc.render()
<html>...<p...>...</p>...
>>> x = p('Some more text').b('bold text')
>>> x = p('and normal again')
>>> print p.render()
<p...>...home...Some more text
<b>...bold text...</b>
...and normal again
</p>
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