How to Read and write xml file in python

We can easily Read and write xml in file using python. In python one library is present name xml, in this library some module is there name as etree, dom, sax, parsers. By the help of these modules you can read and write xml in file easily.

We can read and write xml by xml tree or dom

Write xml data in file

import xml
xml_file = open("customer_data.xml", "wb")
xml_file.write('

    
        1
        2008
        141100
        
        
    
    
        4
        2011
        59900
        
    
    
        68
        2011
        13600
')
xml_file.close()

Xml parsing or read xml from file

Example: 1
File customer_data.xml

<Settings>

<ComputerNameIPs value="" name=”” />

<ComputerConfig value="" />

<ComputerTarget value="" />

<ComputerLoginCredentials value="" >

</Settings>
Python code

import xml.etree.ElementTree as ET
tree = ET.parse('country_data.xml')
root = tree.getroot()

for rank in root.iter(“ComputerNameIPs”):
    rank.attrib["value"]=’Ashish’     #this is for writing
    rank.attrib["name"]=’computer’     
    tree.write('country_data.xml')

for rank in root.iter(“ComputerNameIPs”):
    data=rank.attrib["value"]        #this is for reading
    print data

for roots in root:
    print root.tag	             #it will show all tag which is inside 
    print root.attrib[‘value’]       #it will show any attribute in tag

Example-2

File customer_data.xml
    
        1
        2008
        141100
        
        
    
    
        4
        2011
        59900
        
    
    
        68
        2011
        13600
        
Python code

for child in root:
     print(child.tag, child.attrib)

output... 
country {'name': 'Liechtenstein'} 
country {'name': 'Singapore'} 
country {'name': 'Panama'}

print root[0][1].text

or 

for country in root.findall('country'):
   if .find('year').text==’2008’:
       rank = country.find('year').text
       print rank

output…
  '2008' 

Remove  and appending xml data  

Python code

for roots in root:
	for roo in roots:
  		if roo.tag =='year':
     		   roots.remove(roo)             #this is for removing xml data
     		   tree.write('country_data.xml')

	    newNode1 = ET.Element('rating')
            roots.append(newNode1)               #this is for adding data
            tree.write('country_data.xml')

Output...

    
        1
        </ rating >
        141100
        
        
    
    
        4
        59900
        
	</ rating >
    
    
        68
        13600
        
        
	</ rating >
    

Modifying xml data

for rank in root.iter('rank'):
   new_rank = int(rank.text) + 1
   rank.text = str(new_rank)
   rank.set('updated', 'yes')
   tree.write('output.xml')
 

Output...

    
        2
        2008
        141100
        
        
    
    
        5
        2011
        59900
        
    
    
        69
        2011
        13600