Example in parsing XML menus

xml2json.py

# Parsing XML menu to JSON
#
# Usage:
# python xml2json.py sample.xml
#
# Example data:
# https://raw.githubusercontent.com/cms-l1-globaltrigger/cms-l1-menu/master/2019/L1Menu_Collisions2018_v2_1_0-d2/xml/L1Menu_Collisions2018_v2_1_0-d2.xml
#

import json
import argparse

# Import DOM tree parser
import xml.etree.ElementTree as etree

parser = argparse.ArgumentParser()
parser.add_argument('filename')
args = parser.parse_args()

# Load XML file
with open(args.filename) as f:
    tree = etree.parse(f)

# XPath queries to meta data
name = tree.findall('name')[0].text
uuid_menu = tree.findall('uuid_menu')[0].text
uuid_firmware = tree.findall('uuid_firmware')[0].text
grammar_version = tree.findall('grammar_version')[0].text
comment = tree.findall('comment')[0].text

# XPath queries to algorithms name and index
algorithms = []
for el in tree.findall('algorithm'):
    index = int(el.findall('index')[0].text)
    name = el.findall('name')[0].text
    algorithms.append(dict(
        name=name,
        index=index
    ))

# Convert to JSON
data = json.dumps(dict(
    name=name,
    uuid_menu=uuid_menu,
    uuid_firmware=uuid_firmware,,
    grammar_version=grammar_version,
    comment=comment,
    algorithms=algorithms
))
print(data)