Modifying XML file using python (klish types.xml) -


the following original xml file.

<?xml version="1.0" encoding="utf-8"?> <clish_module xmlns="http://clish.sourceforge.net/xmlschema"            xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"   xsi:schemalocation="http://clish.sourceforge.net/xmlschema                      http://clish.sourceforge.net/xmlschema/clish.xsd">     <!--=======================================================-->     <ptype name="vlan_id"          pattern="(409[0-5]|40[0-8][0-9]|[1-3][0-9]{3}|[1-9][0-9]{2}|[1-9][0-9]|[1-9])"         help="number in range 1-4095"/>     <!--=======================================================-->     <ptype name="myfield"         pattern="0..99"         help="entry number"/>     <!--=======================================================--> </clish_module>

here python code modify xml file

import xml.etree.elementtree et  tree = et.parse('testxml.xml') et.register_namespace('', "http://clish.sourceforge.net/xmlschema") root = tree.getroot()  child in root:     key, value in child.items():         if value == "myfield":             print value             child.attrib['pattern'] = '1..55'  tree.write('testxml.xml', encoding="utf-8")

here resulted xml file.

<?xml version='1.0' encoding='utf-8'?> <clish_module xmlns="http://clish.sourceforge.net/xmlschema" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="http://clish.sourceforge.net/xmlschema                      http://clish.sourceforge.net/xmlschema/clish.xsd">          <ptype help="number in range 1-4095" name="vlan_id" pattern="(409[0-5]|40[0-8][0-9]|[1-3][0-9]{3}|[1-9][0-9]{2}|[1-9][0-9]|[1-9])" />            <ptype help="entry number" name="myfield" pattern="1..55" />    </clish_module>

i'm able modify content there problem in preserving format. can please share knowledge how fix issue.

after trying lot of things, tried way parsing input file , making change attribute , it's value matches

  if value == "myfield":                         fin = open("testxml.xml")                 fout = open("testx.xml", "wt")                 line in fin:                     xm= 'pattern="'+child.attrib['pattern']+'"'                     fout.write( line.replace(xm, 'pattern="1..55"') )

output

<?xml version="1.0" encoding="utf-8"?> <clish_module xmlns="http://clish.sourceforge.net/xmlschema"            xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"   xsi:schemalocation="http://clish.sourceforge.net/xmlschema                      http://clish.sourceforge.net/xmlschema/clish.xsd">     <!--=======================================================-->     <ptype name="vlan_id"          pattern="(409[0-5]|40[0-8][0-9]|[1-3][0-9]{3}|[1-9][0-9]{2}|[1-9][0-9]|[1-9])"         help="number in range 1-4095"/>     <!--=======================================================-->     <ptype name="myfield"         pattern="1..55"         help="entry number"/>     <!--=======================================================--> </clish_module>

not best solution , gives result expected


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