Minor modification, found out why my code wasn't working

sources/scripts/xml_cmd.py

+#!/usr/bin/python
+from sys import argv
+from xml.etree.ElementTree import parse
+
+# Test if file argv[1] exists
+
+# Open the file argv[1] and parse it
+tree = parse(argv[1])
+root = tree.getroot()
+
+# Command lines creation
+for child in root:
+	print child.tag, child.attrib