def list_to_string(in_list, conjunction):
    """Simple helper for formatting lists contaings strings as strings.

    This is intended for simple lists that contain strings. Input will
    not be checked.

    :param in_list: List to be converted to a string.
    :param conjunction: String - conjunction to be used (e.g. and, or).
    """
    return ", ".join(in_list[:-1]) + ", {} {}".format(conjunction, in_list[-1])