def standardize_method_to_len_3(name, padding="--", joiner=","):
    """Standardize an LCIA method name to a length 3 tuple.

    ``name`` is the current name.
    ``padding`` is the string to use for missing fields.

    """
    if len(name) >= 3:
        return (tuple(name)[:2] + (joiner.join(name[2:]),))
    else:
        return (tuple(name) + (padding,) * 3)[:3]