data = {'parent_key': {'key1': 'value1', 'key2': 'value2', 'key3': ['obj1', 'obj2', 'obj3'], 'problem_key': ['problem_data1', 'problem_data2', 'problem_data3']}

json_data = json.dumps(data, indent=4)

parent_key {
    "key1": "value1",
    "key2": "value2",
    "key3": [
        "obj1",
        "obj2",
        "obj3",
        ],
    "problem_key": "[n    "problem_data1",n    "problem_data2",n    "problem_data3"n    ]

{% for k, v in json_data.items %}
    <pre>{{ k }} {{ v }}</pre>
{% endfor %}