def parse_basic_type_str(old_normalizer):
    """
    Modifies a normalizer to automatically parse the incoming type string.  If
    that type string does not represent a basic type (i.e. non-tuple type) or is
    not parsable, the normalizer does nothing.
    """
    @functools.wraps(old_normalizer)
    def new_normalizer(type_str, data):
        try:
            abi_type = parse(type_str)
        except ParseError:
            # If type string is not parsable, do nothing
            return type_str, data

        if not isinstance(abi_type, BasicType):
            return type_str, data

        return old_normalizer(abi_type, type_str, data)

    return new_normalizer