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Re: [libvirt] [RFC] Unify KVM kernel-space and user-space code into a single project



[snip]
>> I was thinking of something like:
>> domain.get_attribute("vncdisplay")
>>
>> Because it's a shame to have to use virsh as a wrapper (or XML file
>> parsing) and re-do all the work that was done to get to the domain
>> object when all your really want is just an attribute..
> 
> You can already do that very simply in python using lxml
>  
>    from lxml import etree
>    tree = etree.parse(domain.XMLDesc())
>    r = tree.xpath('/domain/devices/graphics[ type='vnc']/@port')
> 
Hmmm, cant seem to get that to work:
libvirt_server_util.py", line 159, in detect_session_vncdisplay
    tree = etree.parse(domain.XMLDesc(0))
File "lxml.etree.pyx", line 2692, in lxml.etree.parse
(src/lxml/lxml.etree.c:49594)
File "parser.pxi", line 1500, in lxml.etree._parseDocument
(src/lxml/lxml.etree.c:71364)
File "parser.pxi", line 1529, in lxml.etree._parseDocumentFromURL
(src/lxml/lxml.etree.c:71647)
File "parser.pxi", line 1429, in lxml.etree._parseDocFromFile
(src/lxml/lxml.etree.c:70742)
File "parser.pxi", line 975, in lxml.etree._BaseParser._parseDocFromFile
(src/lxml/lxml.etree.c:67740)
File "parser.pxi", line 539, in
lxml.etree._ParserContext._handleParseResultDoc
(src/lxml/lxml.etree.c:63824)
File "parser.pxi", line 625, in lxml.etree._handleParseResult
(src/lxml/lxml.etree.c:64745)
File "parser.pxi", line 563, in lxml.etree._raiseParseError
(src/lxml/lxml.etree.c:64060)
IOError: Error reading file '<domain type='qemu' id='1'>
  <name>Test</name>
  <uuid>bd4aa2fa-a086-e8b2-8bc5-1de3fc591958</uuid>

...

</domain>
': failed to load external entity "<domain type='qemu' id='1'>
  <name>Test</name>

...

</domain>
"


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