Show creating XML (with optional elements) from nested JSON via jinja2 templating

xml_from_jinja.py

# -*- coding: utf-8 -*-
"""Purpose: Show creating XML from nested JSON with optional elements.

Created: 2017-09-03
Author:  dhohls@csir.co.za
"""
from __future__ import print_function
from jinja2 import Template

xml_template = """<?xml version="1.0" encoding="UTF-8"?>
<urlset>{% for val in values %}
    <person>
        <name>{{val.name}}</name>
        <surname>{{val.surname}}</surname>
        <age>{{val.age}}</age>
        {% if val.contact %}<contact>
            <email>{{val.contact.email}}</email>
            <phone>{{val.contact.phone}}</phone>
        </contact>{% endif %}
    </person>{% endfor %}
</urlset>"""

# JSON-like
values = [
    {
		"name": "John",
		"surname": "Brown",
		"age": 25,
		"contact": {
			"email": "foo",
			"phone": "011"
		}
	},
	{
		"name": "Jane",
		"surname": "Smith",
		"age": 19
	}
]

t = Template(xml_template)
print(t.render(values=values))