def _utf8_list_to_ascii_tuple(utf8_list):
    """
    Convert unicode strings in a list of lists to ascii in a list of tuples.

    :param utf8_list: A nested list of unicode strings.
    :type utf8_list: list
    """
    for n, utf8 in enumerate(utf8_list):
        utf8_list[n][0] = str(utf8[0])
        utf8_list[n][1] = str(utf8[1])
        utf8_list[n] = tuple(utf8)
Convert unicode strings in a list of lists to ascii in a list of tuples.

    :param utf8_list: A nested list of unicode strings.
    :type utf8_list: list