CSV to XML with Related Items Combined, Python 3

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from io import StringIO
import csv
import xml.etree.ElementTree as ET
import xml.dom.minidom as mn

data = '''\
Order|Line|Item|Price
123456789|1|IK123456|199.99
654987321|1|MASGE12385|29.95
654987321|2|KLEAN458792|9.99
654987321|3|LP12489|1959.95'''

curr_order = None
with StringIO(data) as f:
    reader = csv.DictReader(f, delimiter = '|')
    # BUILD A ROOT FOR THE XML TREE
    root = ET.Element("Orders")         
    
    # ITERATE THROUGH EACH ROW AS DICTIONARY 
    for d in reader:
        # CONDITIONALLY BUILD ORDER ELEMENT
        if curr_order != str(d['Order']):
            orderElem = ET.SubElement(root, "Order")        
        curr_order = str(d['Order']) 
        
        # CREATE DESCENDANTS OF ORDER
        orderElem.set('number', str(d['Order']))    
        line = ET.SubElement(orderElem, 'line', number = str(d['Line']))
        ET.SubElement(line, 'item_code').text = str(d['Item'])
        ET.SubElement(line, 'price').text = str(d['Price'])

# PRETTY PRINT OUTPUT
dom = mn.parseString(ET.tostring(root, encoding = 'utf-8'))

print(dom.toprettyxml(indent="   ", encoding = 'utf-8').decode('utf-8'))

[ + ] Show input
Absolute running time: 0.18 sec, cpu time: 0.05 sec, memory peak: 10 Mb, absolute service time: 0,25 sec