Module path

Basic support for evaluating XPath expressions against streams.

>>> from genshi.input import XML
>>> doc = XML('''<doc>
...  <items count="4">
...       <item status="new">
...         <summary>Foo</summary>
...       </item>
...       <item status="closed">
...         <summary>Bar</summary>
...       </item>
...       <item status="closed" resolution="invalid">
...         <summary>Baz</summary>
...       </item>
...       <item status="closed" resolution="fixed">
...         <summary>Waz</summary>
...       </item>
...   </items>
... </doc>''')
>>> print(doc.select('items/item[@status="closed" and '
...     '(@resolution="invalid" or not(@resolution))]/summary/text()'))
BarBaz

Because the XPath engine operates on markup streams (as opposed to tree structures), it only implements a subset of the full XPath 1.0 language.