import lxml.html myxml=''' <cooperate> <job DecreaseHour="1" table="tpa_radio_sum"> </job>
<job DecreaseHour="2" table="tpa_radio_sum"> </job> <job DecreaseHour="3" table="tpa_radio_sum"> </job> </cooperate> ''' root=lxml.html.fromstring(myxml) nodes1=root.xpath('//job[@DecreaseHour="1"]') nodes2=root.xpath('//job[@table="tpa_radio_sum"]') print "nodes1=",nodes1 print "nodes2=",nodes2 >>> nodes1= [] nodes2= [<Element job at 0x1241240>, <Element job at 0x1362690>, <Element job at 0x13626c0>] would you mind to tell me why nodes1=[]??
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