Martin Aspeli wrote:

Hi,

I'd like to quickly/efficiently get a list of all <?xml-stylesheet ?> processing instructions in a given document.

I have managed to find it via root_tree.getprevious(), but it seems I need to search through the siblings here to find the <?xml-stylesheet ?> if indeed there is one.

I'm using the HTML parser.

Is there a more natural API?

Also, serialising using lxml.html.tostring() seems to lose the <?xml-stylesheet ?> PI. Is this by design?

Mmmm.... and another thing: once I get the HtmlProcessingInstruction node, how can I get the value of its pseudo-attributes (href and type, in this case)? The attr dict is empty... Martin -- Author of `Professional Plone Development`, a book for developers who want to work with Plone. See http://martinaspeli.net/plone-book

Hi, Martin Aspeli wrote:

I'd like to quickly/efficiently get a list of all <?xml-stylesheet ?> processing instructions in a given document.

reversed( el for el in root.itersiblings(preceding=True) if el.tag is etree.ProcessingInstruction and el.target == "xml-stylesheet" )

Also, serialising using lxml.html.tostring() seems to lose the <?xml-stylesheet ?> PI. Is this by design?

You need to wrap the root element in an ElementTree and serialise that. Stefan