Sort junit test files by the provided attribute

junit-sort.py

import argparse
import sys
import xml.etree.ElementTree as ET

def getChildValue(val):
    try:
        return float(val)
    except:
        return val

def sortchildrenby(parent, attr):
    parent[:] = sorted(parent, key=lambda child: getChildValue(child.get(attr)))

parser = argparse.ArgumentParser(description='Sort junit files')
parser.add_argument('--field', dest='field', default='time',
                   help='sort tests by (default: time)')

args = parser.parse_args()

lines = sys.stdin.readlines()
tree = ET.fromstring("".join(lines))

sortchildrenby(tree, args.field)
for child in tree:
    sortchildrenby(child, args.field)

print(ET.tostring(tree, encoding='utf8', method='xml'))