test_admin_form.py

def get_inital_data(response):
    data = {}
    for inline in response.context_data['inline_admin_formsets']:
        form = inline.formset.management_form
        for k, v in form.initial.iteritems():
            data[form.prefix + '-' + k] = v
    form = response.context_data['adminform'].form
    for field_name in form.changed_data:
        data[field_name] = form.fields[field_name].initial
    return data