Split comma-separated tag_suffix[:-1] and map with _maybe_int

def _split_params(tag_prefix, tag_suffix):
    "Split comma-separated tag_suffix[:-1] and map with _maybe_int"
    if tag_suffix[-1:] != ')':
        raise ValueError, "unbalanced parenthesis in type %s%s" % (tag_prefix, tag_suffix)
    return map(_maybe_int, tag_suffix[:-1].split(','))