How to get parent tag while using XPaths in xml.etree.elementree with python 2.6.4
Frage
I am newbie to this forum.
I am trying to retrieve data from xml.etree.cElementTree.
i have the following code
Code Snippet
import xml.etree.cElementTree as ET
xmldata ="""
<pipeline>
<ep_150>
<stage name="lay" longname="layout" department="layout" process="production">
<review name="R1" reviewer="sridhar reddy" role="supervisor" id="p1234">
</review>
</stage>
<stage name="lip" longname="lipsync" department="lipsync" process="production">
<review name="R2" reviewer="someone" role="supervisor" id="p2345">
</review>
</stage>
<stage name="blk" longname="blocking" department="animation" process="production">
<review name="R3" reviewer="sudeepth" role="supervisor" id="p4645" dependson='R1'>
</review>
<review name="R4" reviewer="chandu" role="director" id="p5678">
</review>
</stage>
<stage name="pri" longname="primary" department="animation" process="production">
<review name="R5" reviewer="sudeepth" role="supervisor" id="p4645" style="dep" >
</review>
<review name="R6" reviewer="sudeepth" role="bld_supervisor" id="p2556" style="dep">
</review>
</stage>
<stage name="sec" longname="secondary" department="animation" process="production">
<review name="R7" reviewer="sha" role="supervisor" id="p1234" style="dep">
</review>
<review name="R8" reviewer="chandu" role="director" id="p5678">
</review>
</stage>
</ep_150>
</pipeline>
"""
root = ET.fromstring(xmldata)
stages = root.findall("./ep_150/stage")
print 'Stages in animation department....\n'
for stage in stages:
if stage.attrib['department']=='animation':
print stage.attrib['name']
review = root.findall("./ep_150/stage/review")
print '\n\nreviews for id=p4645\n'
for rev in review:
if rev.attrib['id']=='p4645':
print (rev.attrib['name'])
with the above code i am getting the result as below
Stages in animation department....
blk
pri
sec
reviews for id=p4645
R3
R5
But i need the output for second half as
reviewes for id=p4645
blk - R3
pri - R5
i.e, i need the parent tag of the element
Lösung
The children don't know about their parents but the parents know about their children so you have to structure your code accordingly :-
stages = root.findall("./ep_150/stage")
print '\n\nreviews for id=p4645\n'
for stage in stages:
for rev in stage.findall('review'):
if rev.attrib['id']=='p4645':
print stage.attrib['name'], rev.attrib['name']
See http://effbot.org/zone/element.htm#accessing-parents
Unrelated to the answer. You can move those if's inside the findall argument if you like :-
root = ET.fromstring(xmldata)
stages = root.findall("./ep_150/stage[@department='animation']")
print 'Stages in animation department....\n'
for stage in stages:
print stage.attrib['name']
stages = root.findall("./ep_150/stage")
print '\n\nreviews for id=p4645\n'
for stage in stages:
for rev in stage.findall("review[@id='p4645']"):
print stage.attrib['name'], rev.attrib['name']
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