structure.py

INVOICE_ID = [ 
    ['Tahun', 4, 'N'],
    ['Kode', 2, 'N'],
    ['SSPD No', 6, 'N'],
    ]

INVOICE_ID_LENGTH = 0
for nama, size, tipe in INVOICE_ID:
    INVOICE_ID_LENGTH += size

INVOICE_ID_V2 = [
    ['Provinsi', 2, 'N'],
    ['Kabupaten', 2, 'N'],
    ['Jenis Pajak', 2, 'N'],
    ['Tahun', 2, 'N'],
    ['Kode', 2, 'N'],
    ['SSPD No', 6, 'N'],
    ]

INVOICE_ID_LENGTH_V2 = 0
for nama, size, tipe in INVOICE_ID_V2:
    INVOICE_ID_LENGTH_V2 += size