Mercurial > genshi > genshi-test
comparison doc/xpath.txt @ 820:1837f39efd6f experimental-inline
Sync (old) experimental inline branch with trunk@1027.
| author | cmlenz |
|---|---|
| date | Wed, 11 Mar 2009 17:51:06 +0000 |
| parents | 55cf81951686 |
| children | 09cc3627654c |
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| 500:0742f421caba | 820:1837f39efd6f |
|---|---|
| 50 * ``position()`` | 50 * ``position()`` |
| 51 * ``string()`` | 51 * ``string()`` |
| 52 * ``sum()`` | 52 * ``sum()`` |
| 53 | 53 |
| 54 The mathematical operators (``+``, ``-``, ``*``, ``div``, and ``mod``) are not | 54 The mathematical operators (``+``, ``-``, ``*``, ``div``, and ``mod``) are not |
| 55 yet supported, whereas the various comparison and logical operators should work | 55 yet supported, whereas sub-expressions and the various comparison and logical |
| 56 as expected. | 56 operators should work as expected. |
| 57 | 57 |
| 58 You can also use XPath variable references (``$var``) inside predicates. | 58 You can also use XPath variable references (``$var``) inside predicates. |
| 59 | 59 |
| 60 | 60 |
| 61 ---------------- | 61 ---------------- |
| 62 Querying Streams | 62 Querying Streams |
| 63 ---------------- | 63 ---------------- |
| 64 | 64 |
| 65 :: | 65 The ``Stream`` class provides a ``select(path)`` function that can be used to |
| 66 retrieve subsets of the stream: | |
| 66 | 67 |
| 67 from genshi.input import XML | 68 .. code-block:: pycon |
| 68 | 69 |
| 69 doc = XML('''<doc> | 70 >>> from genshi.input import XML |
| 70 <items count="2"> | |
| 71 <item status="new"> | |
| 72 <summary>Foo</summary> | |
| 73 </item> | |
| 74 <item status="closed"> | |
| 75 <summary>Bar</summary> | |
| 76 </item> | |
| 77 </items> | |
| 78 </doc>''') | |
| 79 print doc.select('items/item[@status="closed"]/summary/text()') | |
| 80 | 71 |
| 81 This would result in the following output:: | 72 >>> doc = XML('''<doc> |
| 73 ... <items count="4"> | |
| 74 ... <item status="new"> | |
| 75 ... <summary>Foo</summary> | |
| 76 ... </item> | |
| 77 ... <item status="closed"> | |
| 78 ... <summary>Bar</summary> | |
| 79 ... </item> | |
| 80 ... <item status="closed" resolution="invalid"> | |
| 81 ... <summary>Baz</summary> | |
| 82 ... </item> | |
| 83 ... <item status="closed" resolution="fixed"> | |
| 84 ... <summary>Waz</summary> | |
| 85 ... </item> | |
| 86 ... </items> | |
| 87 ... </doc>''') | |
| 82 | 88 |
| 83 Bar | 89 >>> print doc.select('items/item[@status="closed" and ' |
| 90 ... '(@resolution="invalid" or not(@resolution))]/summary/text()') | |
| 91 BarBaz | |
| 92 | |
| 84 | 93 |
| 85 | 94 |
| 86 --------------------- | 95 --------------------- |
| 87 Matching in Templates | 96 Matching in Templates |
| 88 --------------------- | 97 --------------------- |