libxml2 - Attribute

I'd like to read the attributes from a node in my xml - file, but i didn't
found an example for this. Could someone help me please?
I ghet the attribute count work neither.

example - xml file

<test>
<muh attr1="test1" attr2="test">ku limuh</muh>
</test>

example python - script

ctxt = doc.xpathNewCon text()
res = ctxt.xpathEval( "//test/muh")
for myres in res:
print myres.Attribute Count


File "/usr/lib/python2.2/site-packages/libxml2.py", line 189, in __getattr__
raise AttributeError, attr
AttributeError: AttributeCount