def get_person_oldest_date(person_id):
    ''' Returns oldest date of cached data for person ID, None if not available. '''
    cache_oldest_date = get_cache_oldest_date('pid:' + str(person_id))

    if cache_oldest_date:
        return cache_oldest_date
    return datetime.now().replace(microsecond=0)
def get_person_oldest_date(person_id):
    ''' Returns oldest date of cached data for person ID, None if not available. '''
    cache_oldest_date = get_cache_oldest_date('pid:' + str(person_id))

    if cache_oldest_date:
        return cache_oldest_date
    return datetime.now().replace(microsecond=0)
def get_person_oldest_date(person_id):
    """
    Returns oldest date of cached data for person ID, None if not available
    """
    return get_cache_oldest_date('pid:' + str(person_id))
def get_person_oldest_date(person_id):
    """
    Returns oldest date of cached data for person ID, None if not available
    """
    return get_cache_oldest_date('pid:' + str(person_id))