why the conut( ) can not get the number?

水静流深 1248283536 at qq.com
Sun Dec 9 01:33:06 CET 2012

i wnat to get the number of  a atrributes in a xpath,here is my code,why i can not get the number ? 
import urllib
import lxml.html
for order,node in enumerate(root.xpath('//li[@class="toctree-l1"]')):
  print order,node.xpath('.//a[count(*)]')
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