python - Search Text and replace with lxml -

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i need search text in multi-line xml file have multiple tags. xml file looks 

<?xml version="1.0" encoding="utf-8"?> <nc:data xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0">     <system xmlns="http://www.abc.xyz">       <context>             <name>context_1</name>             <host>                 <name>xyz</name>                 <tag1>                     <name>pqr</name>                     <role>s1</role>                     <tag2>test</tag2>                 </tag1>                 <tag2>                     <name>pqr</name>                     <role>s1</role>                     <tag2>test</tag2>                 </tag2>                           </host>       </context>     </system> </nc:data>

i want search appearances of text "test" in xml file , list parent tag in output. unfortunately unable so.

the python code have written : 

import os import xml  import sys  xml.dom import minidom import xml.etree.elementtree et  def xml_parsing():     '''      open('file.xml', 'rt') f:         tree = et.parse(f)         node in tree.findall('.//context'):             print node, node.tag, node.attrib             url = node.attrib.get('tag1')             print url   xml_parsing()

i getting blank result output , unable beyond it. have tried both elementtree , lxml. believe has search pattern trying find using findall.

please advise expert comments should tried now.

i tried sax way , code this:

xmldoc = minidom.parse('file.xml') reflist = xmldoc.getelementsbytagname('tag1') print reflist[0].toxml()

but returns me complete line other value between tags.

xpath expression find element, regardless of element name , location in xml document, having text value equals test //*[text()='test'] or alternatively //*[.='test'].

consider following working lxml example demonstrate finding such elements , update value :

from lxml import etree et  xml = '''<?xml version="1.0" encoding="utf-8"?> <nc:data xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0">     <system xmlns="http://www.abc.xyz">       <context>             <name>context_1</name>             <host>                 <name>xyz</name>                 <tag1>                     <name>pqr</name>                     <role>s1</role>                     <tag2>test</tag2>                 </tag1>                 <tag2>                     <name>pqr</name>                     <role>s1</role>                     <tag2>test</tag2>                 </tag2>                           </host>       </context>     </system> </nc:data>'''  tree = et.fromstring(xml) node in tree.xpath("//*[.='test']"):     #update node value new text 'foo'     node.text = 'foo'     print et.tostring(node)

output :

<tag2 xmlns="http://www.abc.xyz" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0">foo</tag2>  <tag2 xmlns="http://www.abc.xyz" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0">foo</tag2>

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