def normalize_events_list(old_list):
    """Internally the `event_type` key is prefixed with underscore but the API
    returns an object without that prefix"""
    new_list = []
    for _event in old_list:
        new_event = dict(_event)
        new_event['event_type'] = new_event.pop('_event_type')
        new_list.append(new_event)
    return new_list