def file_to_table(filename):
    f = open(filename, 'r')
    lines = f.readlines()
    f.close()

    to_d_liste = []

    for line in lines:
        line = line.strip('\n')
        line = line.split(',')

        new_line = []
        for element in line:
            if element.isdigit():
                element = int(element)
            new_line.append(element)

        to_d_liste.append(new_line)

    return to_d_liste


table = file_to_table('box_b.txt')

print(table)