python xml有效性判断

#encoding= utf-8
 
 

  import xml.etree.ElementTree as ET
 
 

  
 

  try:
 
 

      ET.parse("xml1.xml")
 
 

      print u"ok"
 
 

  except Exception,e:
 
 

      print u"error"
 
 

      print u"error:",e