def get_largest_logo(logos):
    """
    Given a list of logos, this one finds the largest in terms of perimeter
    :param logos: List of logos
    :return: Largest logo or None
    """
    if len(logos) >= 1:
        logo = max(logos, key=lambda x: int(x.get('height', 0)) + int(x.get('width', 0))).get('value')
        return logo