If both objects aren't either both string or unicode instances force them to unicode

def make_type_consistent(s1, s2):
    """If both objects aren't either both string or unicode instances force them to unicode"""
    if isinstance(s1, str) and isinstance(s2, str):
        return s1, s2

    elif isinstance(s1, unicode) and isinstance(s2, unicode):
        return s1, s2

    else:
        return unicode(s1), unicode(s2)