[lxml-dev] Avoiding re-parsing for document loading
I have an XSLT that accesses a number of other documents. These other documents are also created in lxml. Is there a way to pass them to my stylesheet without incurring an additional parse? Laurence
http://codespeak.net/lxml/resolvers.html I believe that's what you want. If you don't mind making your XSLT bound to your lxml setup, you could also make custom XSLT/XPath extension functions that returned nodesets. --Paul On Jan 30, 2009, at 10:04 AM, Laurence Rowe wrote:
I have an XSLT that accesses a number of other documents. These other documents are also created in lxml. Is there a way to pass them to my stylesheet without incurring an additional parse?
Laurence _______________________________________________ lxml-dev mailing list lxml-dev@codespeak.net http://codespeak.net/mailman/listinfo/lxml-dev
Sadly this doesn't work:
Traceback (most recent call last):
File "blocks.py", line 72, in ?
output = render(page_path, layout_path, tile_path)
File "blocks.py", line 59, in render
layout_transform = XSLT(compiler(layout))
File "xslt.pxi", line 505, in lxml.etree.XSLT.__call__
(src/lxml/lxml.etree.c:103335)
File "lxml.etree.pyx", line 227, in
lxml.etree._ExceptionContext._raise_if_stored
(src/lxml/lxml.etree.c:6442)
File "xslt.pxi", line 90, in lxml.etree._xslt_resolve_from_python
(src/lxml/lxml.etree.c:99907)
TypeError: Cannot convert lxml.etree._ElementTree to lxml.etree._InputDocument
I have to use one of return_{filename|file|string|empty} which means
serializing the document and reparsing.
Laurence
2009/1/30 Paul Everitt
http://codespeak.net/lxml/resolvers.html
I believe that's what you want. If you don't mind making your XSLT bound to your lxml setup, you could also make custom XSLT/XPath extension functions that returned nodesets.
--Paul
On Jan 30, 2009, at 10:04 AM, Laurence Rowe wrote:
I have an XSLT that accesses a number of other documents. These other documents are also created in lxml. Is there a way to pass them to my stylesheet without incurring an additional parse?
Laurence _______________________________________________ lxml-dev mailing list lxml-dev@codespeak.net http://codespeak.net/mailman/listinfo/lxml-dev
Hi, Laurence Rowe wrote:
I have an XSLT that accesses a number of other documents. These other documents are also created in lxml. Is there a way to pass them to my stylesheet without incurring an additional parse?
This might be a way to do it: http://codespeak.net/lxml/extensions.html#xslt-extension-elements That said, you should still do some performance measurements to see if parsing a document that you return from a custom resolver (called when encountering the document() function) is really expensive enough to merit a custom solution. Parsing is an impressively cheap thing in lxml/libxml2. Stefan
participants (3)
-
Laurence Rowe -
Paul Everitt -
Stefan Behnel